研究者紹介システム

丑丸 敦史
ウシマル アツシ
大学院人間発達環境学研究科 人間環境学専攻
教授
生物関係
Last Updated :2022/01/10

研究者情報

所属

  • 【主配置】

    大学院人間発達環境学研究科 人間環境学専攻
  • 【配置】

    国際人間科学部 環境共生学科, 発達科学部 人間環境学科, 先端融合研究環, 環境保全推進センター

学位

  • 博士(理学), 京都大学

授業科目

ジャンル

  • 科学・技術 / 生物

コメントテーマ

  • 生物多様性
  • 里山
  • 水田
  • 植物生態学

研究ニュース

研究活動

研究分野

  • ライフサイエンス / 生態学、環境学

論文

  • Atushi Ushimaru, Ishii Rin, Koki R. Katsuhara

    Wiley, 2021年04月02日, Plant Biology, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Aoi Nikkeshi, Masayoshi K. Hiraiwa, Atushi Ushimaru, Kazuhiko Hoshizaki, Akifumi Makita, Inoue Mizuki

    Premise: Understanding the flower visitation history of individual pollinators is key in the study of pollination networks, but direct tracking is labor intensive and, more important, does not capture information about the previous interactions of an individual. Therefore, a protocol to detect most of the pollen species on the body surfaces of an individual pollinator could elucidate its flower visitation history. Methods and Results: Under a microscope, we observed 6.0-µL droplets from a sample solution (1.0 or 3.0 mL) containing pollen grains collected from individuals of six major pollinator functional groups. To clarify how many droplets need to be observed to detect all pollen species within the solution, we examined up to 10 droplets collected from each individual insect. Sample-based rarefaction curve analyses of the data showed that we could detect ~90% of the pollen species and the plant-pollinator links in the networks by observing six droplets. Conclusions: The rarefaction curve analysis for pollen-on-pollinator studies is a useful preliminary step for minimizing the time and labor required while maximizing the data on the flower visitation history of each individual pollinator and revealing any hidden flower-pollinator interactions.

    Wiley, 2021年02月, Applications in Plant Sciences, 9 (2), e11411, 英語, 国際誌

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    研究論文(学術雑誌)

  • Taiki Inoue, Yuki A. Yaida, Yuki Uehara, Koki R. Katsuhara, Jun Kawai, Keiko Takashima, Atushi Ushimaru, Tanaka Kenta

    Seminatural grasslands are ecosystems rich in biodiversity. However, their decline has been reported worldwide, and identification of grasslands with high conservation priority is urgently required. Recently, an increasing number of studies have reported that past vegetation history affects current biological communities. To evaluate whether the temporal continuity of grasslands promotes biodiversity, and thus can be an indicator of conservation priority, we studied vascular plant communities in old (160-1000s years) and new (52-70 years after deforestation) grasslands, as well as in forests, of Sugadaira Highland in central Japan. The number of plant species was highest in old grasslands, followed by new grasslands and forests. This pattern was much clearer in the number of grassland-dependent native and grassland-dependent endangered species, indicating the role of old grasslands as refugia for those species. The species composition differed between old and new grasslands. New grasslands had species compositions in between those of old grasslands and forests, suggesting that the plant community in new grasslands retains the influence of past forestation for more than 52 years after deforestation. Eleven indicator species were detected in old grasslands, but none in new grasslands, suggesting the uniqueness of the plant community in old grasslands. We conclude that the temporal continuity of grasslands increases plant diversity and can be an indicator of grasslands with high conservation priority.

    Wiley, 2021年01月, Ecological Research, 36 (1), 24 - 31, 英語

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    研究論文(学術雑誌)

  • T Jo, S Tomita, Y Kohmatsu, M Osathanunkul, A Ushimaru, T Minamoto

    The diversity and the abundance of amphibians have dramatically declined globally over the past 30 years, and the monitoring and conservation of their habitats is essential. However, traditional methods such as bait trapping and mark-recapture are costly, and morphological identification usually requires a high level of taxonomic expertise. Here, seasonal surveillances of Hida salamander Hynobius kimurae were performed by means of environmental DNA (eDNA) analysis with Hynobius-specific primers and a species-specific TaqMan probe. Water sampling and visual surveys were conducted seasonally in a stream in Kyoto Prefecture, Japan. Detection rates of eDNA were then calculated by real-time PCR, and eDNA site occupancy probability was estimated by multi-scale occupancy modeling. The eDNA-based detection rate of Hida salamander was 76.7%, whereas the visual survey-based detection rate was 23.3%, and target eDNA was detected at almost all sites where the presence of target species was visually confirmed. Moreover, factors relating to the site- and sample-level occurrence probabilities of the target eDNA differed depending on the developmental stage of the target species. Our findings support previous studies showing that eDNA analysis enables an effective assessment of amphibian distributions without damaging the organisms or their habitat, and we compare for the first time the site occupancy probability of amphibian eDNA throughout the life cycle of an amphibian species. The present study contributes to the development of eDNA analysis as a tool for understanding the distribution and seasonal activity of amphibian species and will thus aid in the planning of conservation measures and habitat restoration for these species.

    Inter-Research Science Center, 2020年11月19日, Endangered Species Research, 43, 341 - 352, 英語

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    研究論文(学術雑誌)

  • Atushi Ushimaru, Kei Uchida, Makihiko Ikegami, Takeshi Suka

    Elsevier, 2020年06月, Encyclopedia of the World's Biomes, 785 - 799, 英語

    [査読有り][招待有り]

    論文集(書籍)内論文

  • Koki R. Katsuhara, Naoyuki Nakahama, Taketo Komura, Masaya Kato, Yuko Miyazaki, Yuji Isagi, Motomi Ito, Atushi Ushimaru

    © 2020, Genetics Society of Japan. All rights reserved. Table 1 on p. 135 should be replaced with the corrected Table 1 shown bellow. (Table presented).

    Genetics Society of Japan, 2020年02月01日, Genes & Genetic Systems, 95 (1), 51 - 51, 英語

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    研究論文(学術雑誌)

  • Iwachido Y, Uchida K, Ushimaru A,Yokota S, Sasaki T

    Springer Science and Business Media LLC, 2020年02月, Landscape and Ecological Engineering, 106 (2), 163 - 172, 英語

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    研究論文(学術雑誌)

  • Toshiaki Jo, Arisa Fukuoka, Kei Uchida, Atushi Ushimaru, Toshifumi Minamoto

    Environmental DNA (eDNA) analysis has been used as a cost-efficient and non-invasive tool for monitoring invasive and threatened species. Previous studies typically involve two approaches; species-specific detection via PCR and multiple species detection via metabarcoding. However, the former could be costly when several species are targeted, and the latter could sometimes be insufficient to distinguish closely related species. Here, the simultaneous eDNA detection from multiple species via multiplex real-time PCR was applied to 99 ponds to evaluate the distribution of three exotic and three threatened native fish species over different seasons. We detected bluegill sunfish (Lepomis macrochirus) eDNA at 31 sites, largemouth bass (Micropterus salmoides) eDNA at 22 sites, smallmouth bass (Micropterus dolomieu) eDNA at one site, golden venus chub (Hemigrammocypris rasborella) eDNA at 11 sites, Japanese medaka (Oryzias latipes) eDNA at 26 sites, and weather loach (Misgurnus anguillicaudatus) eDNA at 41 sites. We found that eDNA detection rates were higher in early summer for all fish species. Moreover, exotic fish eDNA was detected more frequently in ponds which were easier to access by car and which have a larger surface area and higher pH. Furthermore, the detection rates of native fish eDNA were generally lower in the ponds where exotic fish eDNA was detected more frequently. Multiplex real-time PCR can help detect the distribution of exotic and threatened native species for conservation and ecosystem management. This method is expected to substantially contribute to the early detection of invasive species and the efficient protection of threatened species' habitat.

    SPRINGER, 2020年02月, BIOLOGICAL INVASIONS, 22 (2), 455 - 471, 英語

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    研究論文(学術雑誌)

  • Does sexual dimorphism exist in flowering phenology traits in anemophilous dioecious species?: a test with Rumex acetosa

    Matsuhisa Seiko; Ushimaru Atushi

    2019年10月, American Journal of Botany, 106 (10), 1356 - 1364, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Conservation and diversity of Palearctic grasslands - Editorial to the 5th EDGG special issue in Hacquetia.

    Valkó O, Labadessa R, Palpurina S, Burrascano S, Ushimaru A and Venn S

    2019年07月, Hacquetia, 18 (2), 143 - 146

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    研究論文(学術雑誌)

  • Ski runs as an alternative habitat for threatened grassland plant species in Japan

    Yuki A. Yaida, Takuma Nagai, Kazuya Oguro, Koki R. Katsuhara, Kei Uchida, Tanaka, Kenta, Ushimaru, Atushi

    2019年07月, Palaearctic Grasslands, 42, 16 - 22, 英語

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    研究論文(学術雑誌)

  • Koki R. Katsuhara, Naoyuki Nakahama, Taketo Komura, Masaya Kato, Yuko Miyazaki, Yuji Isagi, Motomi Ito, Atushi Ushimaru

    Commelina communis f. ciliata (Commelinaceae), a newly distinguished taxon, is an annual andromonoecious herb exhibiting a mixed mating system, the details of which remain unclear. We developed microsatellite markers for use in exploring the evolution of andromonoecy and mixed mating in the species. Fifteen micro satellite loci were developed using next-generation sequencing. The primer sets were used to evaluate 65 C. communis f. ciliata individuals from three populations in Japan; we found 1-13 alleles per locus and the expected heterozygosity ranged from 0.00 to 0.76. The markers are potentially useful to examine intra- and inter-species genetic structure and the mixed mating strategy of Commelina species via paternity analysis.

    GENETICS SOC JAPAN, 2019年06月, GENES & GENETIC SYSTEMS, 94 (3), 133 - 138, 英語

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    研究論文(学術雑誌)

  • Prior selfing can mitigate the negative effects of mutual reproductive interference between coexisting congeners.

    Katsuhara KR and Ushimaru A

    2019年05月, Functional Ecology, 33 (8), 1504 - 1513, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Jeff Ollerton, Sigrid Liede-Schumann, Mary E Endress, Ulrich Meve, André Rodrigo Rech, Adam Shuttleworth, Héctor A Keller, Mark Fishbein, Leonardo O Alvarado-Cárdenas, Felipe W Amorim, Peter Bernhardt, Ferhat Celep, Yolanda Chirango, Fidel Chiriboga-Arroyo, Laure Civeyrel, Andrea Cocucci, Louise Cranmer, Inara Carolina da Silva-Batista, Linde de Jager, Mariana Scaramussa Deprá, Arthur Domingos-Melo, Courtney Dvorsky, Kayna Agostini, Leandro Freitas, Maria Cristina Gaglianone, Leo Galetto, Mike Gilbert, Ixchel González-Ramírez, Pablo Gorostiague, David Goyder, Leandro Hachuy-Filho, Annemarie Heiduk, Aaron Howard, Gretchen Ionta, Sofia C Islas-Hernández, Steven D Johnson, Lize Joubert, Christopher N Kaiser-Bunbury, Susan Kephart, Aroonrat Kidyoo, Suzanne Koptur, Cristiana Koschnitzke, Ellen Lamborn, Tatyana Livshultz, Isabel Cristina Machado, Salvador Marino, Lumi Mema, Ko Mochizuki, Leonor Patrícia Cerdeira Morellato, Chediel K Mrisha, Evalyne W Muiruri, Naoyuki Nakahama, Viviany Teixeira Nascimento, Clive Nuttman, Paulo Eugenio Oliveira, Craig I Peter, Sachin Punekar, Nicole Rafferty, Alessandro Rapini, Zong-Xin Ren, Claudia I Rodríguez-Flores, Liliana Rosero, Shoko Sakai, Marlies Sazima, Sandy-Lynn Steenhuisen, Ching-Wen Tan, Carolina Torres, Kristian Trøjelsgaard, Atushi Ushimaru, Milene Faria Vieira, Ana Pía Wiemer, Tadashi Yamashiro, Tarcila Nadia, Joel Queiroz, Zelma Quirino

    Oxford University Press (OUP), 2019年01月23日, Annals of Botany, 123 (2), 311 - 325, 英語

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    研究論文(学術雑誌)

  • Jürgen Dengler, Viktoria Wagner, Iwona Dembicz, Itziar García-Mijangos, Alireza Naqinezhad, Steffen Boch, Alessandro Chiarucci, Timo Conradi, Filibeck Goffredo, Riccardo Guraino, Monika Janišová, Manuel J. Steinbauer, Svetlana Aćić, Alicia T.R. Acosta, Munemitsu Akasaka, Marc-Andre Allers, Iva Apostolova, Irena Axmanová, Branko Bakan, Alina Baranova, Manfred Bardy-Durchhalter, Sándor Bartha, Esther Baumann, Thomas Becker, Ute Becker, Elena Belonovskaya, Karin Bengtsson, José Luis Benito Alonso, Asun Berastegi, Ariel Bergamini, Ilaria Bonini, Hans Henrik Bruun, Vasyl Budzhak, Alvaro Bueno, Juan Antonio Campos

    Schweizerbart, 2018年08月17日, Phytocoenologia, 48 (3), 331 - 347

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    研究論文(学術雑誌)

  • Aoshima I, Uchida K, Ushimaru A and Sato M

    This study focuses on the importance of subjective perceptions in the valuation and conservation of urban green spaces. Because physical attributes of the natural environment are filtered through individuals' perceptions, their self-reporting of the extent of green spaces fluctuates according to their biases. However, the determinant of people's self-reporting of the extent of green spaces within neighborhoods remains unclear. An examination of the relationship between the physical attributes of green spaces and the self-reported extent of green spaces is required to address this uncertainty. Accordingly, two separate studies were conducted by establishing two types of data on green spaces: physical data derived from a Geographical Information System and questionnaire-derived self-reported data. Multiple regression analysis was performed to compare the effects of different types of physical green spaces on the self-reported extent of green spaces. The results indicated that residents' perceptions of same-sized green spaces differed considerably depending on their type. To ascertain the effects of subjective perceptions on economic valuation, a life satisfaction approach was subsequently applied within two separate analyses. In the first analysis, reflecting a normal pattern, the relationship between life satisfaction and the area of green space was examined, and in the second analysis, the self-reported extent of green spaces was used as an intermediate variable between green spaces and life satisfaction. A comparison of the estimated values from the two analyses revealed significant differences, depending on whether self-reported green spaces were used as an intermediate variable. Specifically, values of urban green spaces fluctuated more than those of forests in the case of self-reported green spaces. Although urban planners and experts generally emphasize the physical attributes of green spaces, such as area, these results indicate that it is critical to consider people's perceptions.

    ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2018年08月, Urban Forestry & Urban Greening, 34, 166 - 174, 英語

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    研究論文(学術雑誌)

  • Kei Uchida, Hiroki Fujimoto, Atushi Ushimaru

    The biodiversity of agricultural landscapes has been noticeably affected by rapid urbanization. Although many studies have examined species diversity per unit area (alpha diversity), knowledge about the patterns of species turnover (beta diversity) in urban areas remains limited. Furthermore, most beta diversity studies have focused on spatial heterogeneity however, losses of temporal heterogeneity resulting from urbanization remain limited. In this study, we examined how urbanization is associated with decreases in the seasonal heterogeneity of species composition, which could be used as an indicator of the loss of seasonality by ecologists and policy makers aiming to conserve biodiversity. We investigated (1) changes in species richness based on seasonal averages (alpha diversity) and (2) the seasonal turnover of species composition (beta diversity) for flowering plants and butterflies along a rural-urban gradient in semi-natural grasslands. The response variables were alpha and beta diversity for flowering plants and butterflies, and the explanatory variables were urban areas within a 1-km radius of the center of each site. Increasing urban area caused both the seasonal alpha and beta diversity of flowering plants and butterflies to decline. These results supported the homogenization hypothesis for the seasonality of plants and butterflies in semi-natural grasslands of dominant urban areas in East Asia. Future studies should focus on investigating how urbanization is causing both declines in seasonality and changes in the spatial heterogeneity of species composition and associated biodiversity loss. Ecologists and policy makers should focus on developing strategies to halt the loss of temporal biological heterogeneity to maintain biodiversity.

    Elsevier GmbH, 2018年06月01日, Basic and Applied Ecology, 29, 1 - 11, 英語

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    研究論文(学術雑誌)

  • Historical changes in grassland area determined the demography of semi-natural grassland butterflies in Japan

    NAKAHAMA N, UCHIDA K, USHIMARU A, ISAGI Y

    Semi-natural grassland areas expanded worldwide several thousand years ago following an increase in anthropogenic activities. However, semi-natural grassland habitat areas have been declining in recent decades due to changes in landuse, which have caused a loss of grassland biodiversity. Reconstructing historical and recent demographic changes in semi- natural grassland species

    2018年02月, Heredity, 121, 151 - 168, 英語

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    研究論文(学術雑誌)

  • Masayuki Sato, Atushi Ushimaru, Toshifumi Minamoto

    This study investigated the effect of valuators' personal history and beliefs on valuation of ecosystem services around Mt. Rokko, which is located near Kobe, a major city in Japan. Special attention was paid to how differences in lifestyle, access to nature, and experiences during childhood influence willingness to pay (WTP) for peri-urban ecosystem conservation. The estimated values (median: 1858 JPY) were relatively higher than in previous case studies including one on the World Heritage forest in the country, but the value was not outlier of the literature. From the simple model estimation, we focused on the effect of individual differences. The full model including information of personal experience with nature revealed differences in WTP among residents. The basic characteristics of age and income were found to have a significant effect. Interestingly, it was also found that certain experiences during childhood had a significant effect on increasing WTP for ecosystem and biodiversity conservation. These findings suggest the importance of considering the diversity of valuators in ecosystem valuation studies under urbanization processes, and it also warns the extinction of experience with nature under on going urbanization for urban ecosystem conservation.

    ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2017年12月, URBAN FORESTRY & URBAN GREENING, 28, 110 - 117, 英語

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    研究論文(学術雑誌)

  • 満足度指標を用いたとし緑地の経済価値評価

    青島一平, 内田圭, 丑丸敦史, 佐藤真行

    2017年07月, 環境科学会誌, 30 (4), 238 - 249, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • Koki R. Katsuhara, Shumpei Kitamura, Atushi Ushimaru

    Despite the well-known visual attraction function of angiosperm petals, additional roles of these floral organs (e.g. the provision of landing-site platforms for pollinators) have rarely been examined. This is likely because most petals perform multiple functions, making it difficult to isolate the importance of landing sites in pollination success. We investigated the landing-site function of dull-coloured pinnately branched petals in Mitella pauciflora flowers, which are predominantly pollinated by fungus gnats. We conducted a field experiment, in which the effects of experimental petal removal on pollinators' approach, landing and visit duration and floral reproductive success were examined in naturally pollinated flowers. According to direct and time-lapse camera observations, petal removal did not influence pollinators' approach frequency or visit duration, but did significantly decrease their landings. Fruit set and pollen dispatch both significantly decreased with petal removal, indicating that petals promote female and male reproductive success in M.pauciflora by facilitating pollinator landing. This demonstrates that inconspicuous petals primarily have a landing-site function rather than a visual attraction function in M.pauciflora. Discriminating between diverse petal functions is a challenging problem, and new approaches are required to elucidate the functional features of angiosperm flowers. A is available for this article.

    WILEY, 2017年06月, FUNCTIONAL ECOLOGY, 31 (6), 1193 - 1200, 英語

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    研究論文(学術雑誌)

  • Masayoshi K. Hiraiwa, Atushi Ushimaru

    Functional diversity loss among pollinators has rapidly progressed across the globe and is expected to influence plant–pollinator interactions in natural communities. Although recent findings suggest that the disappearance of a certain pollinator functional group may cause niche expansions and/or shifts in other groups, no study has examined this prediction in natural communities with high plant and pollinator diversities. By comparing coastal pollination networks on continental and oceanic islands, we examined how community-level flower visit patterns are influenced by the relative biomass of long-tongued pollinators (RBLP). We found that RBLP significantly correlated with pollinator functional diversity and was lower in oceanic than in continental islands. Pollinator niches shifted with decreasing RBLP, such that diverse species with various proboscis lengths, especially short-tongued species, increasingly visited long-tubed flowers. However, we found no conspicuous negative impacts of low RBLP and the consequent niche shifts on pollinator visit frequencies to flowers in oceanic island communities. Notably, fruit set significantly decreased as RBLP decreased in a study plant species. These results suggest that niche shifts by other functional groups can generally compensate for a decline in long-tongued pollinators in natural communities, but there may be negative impacts on plant reproduction.

    The Royal Society, 2017年01月11日, Proceedings of the Royal Society B: Biological Sciences, 284 (1846), 20162218 - 20162218, 英語

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    研究論文(学術雑誌)

  • 雌雄異株樹木イヌツゲにおける栄養生長形質の性的二型.

    松久聖子,柳沢直,丑丸敦史

    2017年, 岐阜県植物研究会誌, 33, 1 - 7, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • ハナアブ類の海浜植物への訪花 -伊豆諸島と本州の比較-

    平岩 将良, 丑丸 敦史

    双翅目談話会, 2016年11月, はなあぶ, 42, 43 - 46, 日本語

    研究論文(学術雑誌)

  • 訪花昆虫の体表付着花粉分離手法の確立

    日下石 碧, 平岩 将良, 丑丸 敦史, 星崎 和彦, 蒔田 明史, 井上 みずき

    Describing plant-pollinator interaction webs has provided a basis of evolutionary ecol- ogy of plant reproduction and mutualistic network analyses. Although most previous studies described plant-pollinator interactions by observing pollinator visits to owers, some inter- actions could be missed by the pollinator observation. Hence, recording pollen grains on pollinator bodies

    日本花粉学会, 2016年09月, 日本花粉学会会誌, 62 (1), 3 - 7, 日本語

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    研究論文(学術雑誌)

  • Kei Uchida, Masayoshi K. Hiraiwa, Atushi Ushimaru

    The effect of land-use changes on plant diversity is an important issue, as plant diversity is vital to maintaining of threatened insect diversity in agro-ecosystems. Although many studies have examined patterns of a few threatened species, few studies have examined a large number of threatened species while comparing organisms of different trophic levels. Observed and expected community assembly patterns of common and threatened species should be evaluated along land-use gradients in agro-ecosystems, using species richness and red list indicator (RLI). This study examined local and regional diversity of plants and herbivorous insects among abandoned, traditional, and intensified land-use types in semi-natural grasslands and compared observed and expected values via null model analysis. This study showed that the richness and RH of plants and herbivorous insects were maintained in the traditional land-use. However threatened plants and herbivorous insects at sites of land abandonment and intensified use were significant lower than null model expectations. Although, plant richness, rather than RLI, was responsible for maintaining richness and the RLIs of herbivorous insects, plant richness did not linearly correlate with plant RLIs. Threatened plants did not depend on plant richness, it will be vital to identify and conserve unique environments for diversity of plants and herbivores. In conclusion, we should reintroduce traditional land-use practices in intensified use and abandoned grasslands. National and local governmental support for the appropriate management of semi-natural grasslands is beneficial for biodiversity conservation at both the local (e.g., present study area) and national (Japanese) levels. (C) 2016 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2016年09月, BIOLOGICAL CONSERVATION, 201, 270 - 276, 英語

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    研究論文(学術雑誌)

  • Traditional burning and mowing practices support high grassland plant diversity by providing intermediate levels of vegetation height and soil pH

    Yuko K. Nagata, Atushi Ushimaru

    2016年06月, Applied Vegetation Science, 19, 567 - 577, 英語

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    研究論文(学術雑誌)

  • Kei Uchida, Tadashi Shinohara, Sogo Takahashi, Naoyuki Nakahama, Yasuoki Takami, Atushi Ushimaru

    Celes akitanus was rediscovered in semi-natural grasslands in Japan. This species is one of the most endangered insects in Japan; most local populations were thought to be extinct. Reliable records of this rare species had been obtained only from Yamagata, Niigata, Tokyo and Nagano Prefectures. We compared the morphology of the holotype of Oedipoda akitana (= C. akitanus) and newly collected specimens and found that they matched with each other. The species was redescribed based on the holotype and new specimens. A molecular phylogenetic analysis involving other acridid species indicated that our samples were practically identical to C. akitanus from China. We conclude that the specimens we collected are C. akitanus, which has been rediscovered in Japan after about 30years. Because the discovered populations were restricted to narrow and scattered areas, conservation of these populations should be a high priority. Population monitoring and habitat assessment are required. Because C. akitanus and many other endangered species are found in the grassland areas, these habitats should be protected and maintained.

    WILEY-BLACKWELL, 2016年04月, ENTOMOLOGICAL SCIENCE, 19 (2), 89 - 96, 英語

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    研究論文(学術雑誌)

  • Naoyuki Nakahama, Kei Uchida, Atushi Ushimaru, Yuji Isagi

    Recent global land-use changes have led to reductions in many herbaceous plant species in semi-natural grassland landscapes. Changes in management frequency and intensity are known to cause declines in plant populations. However, little is known about the impact of changes in the timing of management practices on the genetic diversity as well as the reproductive success of rare semi-natural grassland species. We determined the suitable management (mowing) timing for Vincetoxicum pycnostelma Kitag. (Apocynaceae; Asclepiadoideae), an endangered summer- and autumn-blooming semi-natural grassland herb. We examined 15 V. pycnostelma populations to assess the effects of mowing timing on the genetic diversity of each population using nine microsatellite markers and on pollination and reproductive success. Pollination success was not affected by flowering timing. Mowing during the mid- to late flowering and fruiting periods of V. pycnostelma (July-September) had a significant negative effect on the number of inflorescences and total fruits produced, whereas mowing before flowering and growing periods (April, May and November-March) had positive effects on the number of inflorescences and fruits, respectively. Furthermore, mowing during the mid- to late flowering and fruiting periods also caused a significant decrease in genetic diversity. Our results demonstrated that mowing events during the mid- to late flowering and fruiting periods caused significant declines in the genetic diversity and/or reproductive success of V pycnostelma. By contrast, mowing before flowering periods significantly enhanced reproductive success. To conserve semi-natural grassland herb diversity, mowing should be avoided during seasons when the flowering and fruiting periods of many endangered species overlap. (C) 2016 Elsevier B.V. All rights reserved.

    ELSEVIER, 2016年04月, AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 221, 20 - 27, 英語

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    研究論文(学術雑誌)

  • Kei Uchida, Sogo Takahashi, Tadashi Shinohara, Atushi Ushimaru

    Biodiversity declines have been driven by land-use changes in semi-natural grasslands worldwide. This is thought to be because threatened species are unable to compete with generalist species, which are better adapted to the new environments created by modern land-use management. Many studies have separately examined biodiversity declines resulting from land abandonment and intensified use, however few have examined their unified effects on biodiversity. In addition, we still do not fully understand the relative importance of decreasing habitat area in comparison to changes in land-use practice with regard to biodiversity. To clarify the roles of these interconnected variables, we compared the diversity of threatened and common herbivorous insects and plants among four land-use types (traditional, annual burning, annual mowing, and abandoned) during 2012 and 2013. Next, we examined whether a relationship exists between herbivorous insects and environmental variables (species richness of plants, as well as current and historical grassland areas). We showed that land-use changes (annual burning, annual mowing and/or land abandonment) diminished the diversity of threatened butterflies, orthopterans, and plants. Herbivorous insects were affected by land-use practices rather than grassland area. Our results suggest that to conserve threatened species in semi-natural grasslands, we should reintroduce traditional land-use practices in areas that currently experience modern practices, such as annual mowing and burning. The reintroduction of traditional management practices would allow for the recovery of plant biodiversity, thereby increasing herbivorous insect diversity. (C) 2016 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2016年04月, AGRICULTURE ECOSYSTEMS & ENVIRONMENT, 221, 156 - 162, 英語

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    研究論文(学術雑誌)

  • 福岡有紗, 高原輝彦, 松本宗弘, 兵庫県立農業高校生物部, 丑丸敦史, 源利文

    In recent years, the degradation of biodiversity has advanced significantly, especially in freshwater ecosystems. To conserve rare species, the distribution of the target species should be known, even if the density is very low. Traditional habitat surveys using direct catches or observations require much time, labor, and expertise. Over the last decade, environmental DNA (eDNA) analysis methods that complement traditional surveys have been developed. In the present study, we developed an eDNAbased detection method for a Cyprinidae species, Hemigrammocypris rasborella, and applied it in natural habitats. First, we tested our method in 11 irrigation ponds for which information on the distribution of H. rasborella was available. The eDNA detection results matched completely with the known presence/absence data. Next, we applied this method to 81 irrigation ponds for which no distribution information was available, and detected the eDNA of H. rasborella in 6 ponds. Subsequently, we conducted capture surveys in the 6 eDNA-positive ponds and found the species in 5 ponds. These results suggest that eDNA analysis is useful for the monitoring of rare species.

    Tohoku University, 2016年, 日本生態学会誌, 66 (3), 613 - 620, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • Aoi Nikkeshi, Daiki Kurimoto, Atushi Ushimaru

    PREMISE OF THE STUDY: The evolutionary shift from radial to bilateral symmetry in flowers is generally associated with the evolution of low flower-size variation. This phenomenon supports the hypothesis that the lower size variation in bilateral flowers can be attributed to low pollinator diversity. In this study, we propose two other hypotheses to explain low flower-size variation in bilateral symmetrical flowers. To test the three hypotheses, we examined the relative importance of pollinator diversity, composition, and bilateral symmetry itself as selective forces on low flower-size variation. METHODS: We examined pollinator diversity and composition and flower-size variation for 36 species in a seminatural ecosystem with high bee richness and frequent lepidopteran visitation. KEY RESULTS: Bilateral flowers were more frequently visited than radial flowers by larger bees, but functional-group diversity of the pollinators did not differ between symmetry types. Although bilateral flowers had significantly lower flower-size variation than radial flowers, flower-size variation did not vary with pollinator diversity and composition but was instead related to bilateral symmetry. CONCLUSIONS: Our results suggest that the lower size variation in bilateral flowers might have evolved under selection favoring the control of pollinator behavior on flowers to enhance the accurate placement of pollen on the body of the pollinator, independent of pollinator type. Because of the limited research on this issue, future work should be conducted in various types of plant-pollinator communities worldwide to further clarify the issue.

    BOTANICAL SOC AMER INC, 2015年12月, AMERICAN JOURNAL OF BOTANY, 102 (12), 2032 - 2040, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Seiko Matsuhisa, Atushi Ushimaru

    PREMISE OF THE STUDY: Sexual floral dimorphism may have evolved under pollinator-mediated natural selection by which female and male functions are differently influenced. We hypothesized that mating success is differently influenced by display size between sexes, under which sexual dimorphism in flowering schedule has evolved in dioecious species. METHODS: We examined sexual dimorphism in the total number of flowers per shoot, maximum daily display size, longevity of individual flowers, and flowering synchrony (maximum proportion of open flowers) in three dioecious Ilex species (I. pedunculosa, I. serrata, and I. crenata) whose female flowers are not smaller than male flowers. We compared pollinator response to natural variation of daily display size between sexes. We also examined the effect of display size on female and male success (fruit set and pollen deposition and removal). KEY RESULTS: In the three species, male shoots produced significantly more flowers than female shoots did. Although female flowers lasted longer and opened more synchronously than male flowers, maximum daily display size was larger on male shoots than on female shoots. Fruit set was significantly pollen-limited in the field in all species. Pollen deposition and/or fruit set increased with female display size, whereas pollen removal decreased or was approximately constant with male display size in the three species. CONCLUSIONS: We suggest that sexual dimorphism in floral longevity and flowering synchrony might enhance both female and male success in relation to the display size-mating success (pollinator attraction) association irrespective of flower size dimorphism.

    BOTANICAL SOC AMER INC, 2015年07月, AMERICAN JOURNAL OF BOTANY, 102 (7), 1187 - 1197, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ryohei G. Ohara, Atushi Ushimaru

    QuestionsAre there positive edge effects on beta- and alpha-diversity of plant species across semi-natural grassland-secondary forest gradients located within a traditional agricultural landscape? Is beta-diversity (dissimilarity in plant species composition between two given plots) well explained by environmental differences for both grasslands and forests? Do gradients of environmental factors created by forest edges influence spatial variation in alpha-diversity from edges to grasslands and forests? LocationSemi-natural grasslands and secondary forests (or conifer plantation) around paddy fields in a traditional agricultural landscape, western Japan. MethodsVegetation survey and environmental (soil water content and sunlight) measurements were conducted on 11 transects passing through grassland-forest ecosystems. Spatial variations in plant beta- and alpha-diversity and environmental variables and their relationships were examined. ResultsWe quantitatively demonstrated common positive edge effects on beta-diversity in both grasslands and forests. Our results suggest that among-edge variations in light conditions, which likely depend on edge aspect and forest type, promote high grassland plant beta-diversity in the vicinity of edges. However, the high beta-diversity of forest floor communities in the proximity of edges cannot be explained by this mechanism. Alpha-diversity tended to be lower within grassland plots located around edges than in grassland interiors, while the richness of the forest community increased toward the edge. This alpha-diversity pattern was suggested to be attributable to resource gradients created by the forest edges. ConclusionsAlthough plant alpha-diversity may not be consistently high in the vicinity of edges, beta-diversity in the communities bordering grassland-forest edges will generally be high in the traditional agricultural landscape. Thus, maintenance of environmental heterogeneity among grassland-forest edges in agricultural ecosystems should be prioritized for local biodiversity conservation.

    WILEY-BLACKWELL, 2015年07月, APPLIED VEGETATION SCIENCE, 18 (3), 493 - 502, 英語

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    研究論文(学術雑誌)

  • Michio Kondoh, Akihiko Mougi, Atushi Ushimaru, Kensuke Nakata

    Springer Science $\mathplus$ Business Media, 2015年04月, Theor Ecol, 9 (1), 15 - 25, 英語

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    研究論文(学術雑誌)

  • Sou Fukumoto, Atushi Ushimaru, Toshifumi Minamoto

    1. To prevent the invasion of exotic species causing a decline in an endangered endemic species, it is important to determine the distribution of both species at an early stage, when the density of the exotic species is still low, and to manage the invasion immediately. However, distinguishing between closely related species is difficult because they share similar characteristics. 2. The identification of DNA fragments sampled from a body of water (environmental DNA) has become a popular technique for rapidly determining the distribution of a target species. In this study, we analysed environmental DNA in water samples from 37 sites across the Katsura River basin in Japan. We used TaqMan real-time PCR to distinguish the Japanese giant salamander Andrias japonicus from the closely related Chinese giant salamander Andrias davidianus, which is known to invade Japanese rivers and hybridize with the Japanese species. 3. In environmental samples, we detected mtDNA of the endemic species at 25 sites and mtDNA of the exotic species at nine sites. The DNA detection sites were concentrated in the upstream region. The exotic species DNA was found beyond the limits of an earlier capturing survey. 4. Synthesis and applications. Using environmental DNA to monitor the two salamander species requires less time and effort than traditional surveys, so a wide-ranging survey can be conducted rapidly. Our results showed that performing three environmental DNA surveys for each site between autumn and winter is desirable for giant salamanders. Further collection of environmental DNA, in combination with conventional population surveys, will provide valuable information that can help protect rare endemic species in a variety of aquatic ecosystems and can help monitor the invasion of exotic species.

    WILEY-BLACKWELL, 2015年04月, JOURNAL OF APPLIED ECOLOGY, 52 (2), 358 - 365, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Kei Uchida, Atushi Ushimaru

    Summary: Although traditional land-use and management practices are known to enhance environmental heterogeneity in agricultural lands, loss of heterogeneity resulting from recent land-use changes can lead to spatiotemporal β-diversity losses (biotic homogenization). However, patterns and causes of β-diversity loss, especially at a within-field scale, have remained unexplored. We examined β-diversity declines in plants, butterflies and orthopterans resulting from land abandonment and intensification in semi-natural grasslands on paddy margins at a within-field scale in relation to changes in disturbance frequency and surrounding landscapes by surveying eight abandoned, thirteen traditional and ten intensive paddy terraces. Three indices, the additive partitioning of species richness (βadd) and the turnover (βtu) and nestedness (βne) components of Jaccard dissimilarity of plants and herbivores, were used to evaluate different aspects of β-diversity. We hypothesized that biotic homogenization due to abandonment and intensification would be expressed as low spatiotemporal βadd and βtu, low spatial βne and high temporal βne. The spatial and temporal βadd of plants and herbivores were higher in traditional terraces than in others. Changes in mowing frequency caused direct declines in butterfly βadd and indirectly decreased herbivore βadd through diminished plant βadd in abandoned and intensified terraces. Neighbouring forests increased plant spatial and butterfly temporal βadd and βtu. Abandoned terraces had higher orthopteran spatial and plant temporal βtu than traditional terraces. Mowing frequency generally did not influence spatial and temporal βtu of plants and herbivores. In intensive terraces, temporal βne of plants were higher than in traditional terraces, suggesting dominance by plant species sharing similar phenologies. Synthesis and applications. These results suggest that traditional mowing practices are essential for maintaining plant and herbivore βadd, and consequently, species pools within terraces. The higher spatial or temporal species turnover of plants and orthopterans in abandoned terraces and higher temporal plant nestedness in intensive than in traditional terraces were not due to increases in species pools within terraces. Because within-terrace environmental heterogeneity is thought to remain in abandoned and intensive terraces, we recommend reduction in mowing frequency in intensive terraces and reintroduction of mowing in abandoned terraces for biodiversity restoration. These results suggest that traditional mowing practices are essential for maintaining plant and herbivore βadd, and consequently, species pools within terraces. The higher spatial or temporal species turnover of plants and orthopterans in abandoned terraces and higher temporal plant nestedness in intensive than in traditional terraces were not due to increases in species pools within terraces. Because within-terrace environmental heterogeneity is thought to remain in abandoned and intensive terraces, we recommend reduction in mowing frequency in intensive terraces and reintroduction of mowing in abandoned terraces for biodiversity restoration.

    Blackwell Publishing Ltd, 2015年, Journal of Applied Ecology, 52 (4), 1033 - 1043, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Kei Uchida, Atushi Ushimaru

    Declines in plants and herbivorous insects due to land use abandonment and intensification have been studied in agricultural areas worldwide. We tested four hypotheses, which were complementary rather than mutually exclusive, to understand the mechanisms driving biodiversity declines due to abandonment and intensification. These predict that biodiversity decline is caused by a decline in resource diversity, changes in disturbance regime, surrounding landscape conversion, and a decrease in biomass production. We compared plant richness and butterfly and orthopteran richness and diversity among three land use types in seminatural grasslands: abandoned, traditional, and intensified terraces. Then, we examined effects of changes in resource (plant) richness, frequency of disturbance (mowing), and surrounding landscapes on butterfly and orthopteran diversity to understand the mechanisms driving decline after land abandonment and intensification. Plant and herbivore richness and diversity were significantly lower in abandoned and intensified grasslands than in traditional grasslands. This trend was consistent throughout the seasons in both years of the study. Changes in mowing frequency and surrounding landscape explained plant richness declines as a consequence of land abandonment and intensification. Declines in herbivorous insects were explained by plant richness declines and changes in mowing frequency, but not by landscape changes. Plant and herbivore richness were maximized at an intermediate mowing frequency (approximately twice per year), which is typical practice on traditional terraces. This is the first report demonstrating that the intermediate disturbance hypothesis explained well the biodiversity declines in agricultural ecosystems. The richness and diversity responses of herbivore functional groups to plant richness, mowing frequency, and surrounding landscapes were generally inconsistent with predictions. We found significant trends in which butterfly and orthopteran species with low abundance in traditional terraces were lost in abandoned and/or intensive terraces. This may suggest that the number of individuals of most herbivorous species decreased randomly with respect to life-history traits following a decline in plant richness after changes in disturbance frequency. This study demonstrates that declines in herbivorous insects can be explained by multiple factors, and provides a unified explanation for biodiversity declines in both abandoned and intensified use of agricultural lands, which have often been studied separately.

    WILEY, 2014年11月, ECOLOGICAL MONOGRAPHS, 84 (4), 637 - 658, 英語

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    研究論文(学術雑誌)

  • Atushi Ushimaru, Atsumi Kobayashi, Ikumi Dohzono

    Although land-use changes such as urbanization have dramatically altered plant-pollinator interactions, little is known about their effects on pollen limitation and floral traits. In this study, we examined pollinator visit frequency, reproductive success, and floral trait measurements in 12 populations of the annual andromonoecious Commelina communis in an urban-rural area Pollinator and mate availability decreased significantly with developed land area around the study site. Most urbanized populations suffered from significant pollinator-limited male and/or female reproductive success. High fruit set in urbanized populations may suggest the presence of high reproductive assurance by selfing. The stigma height and degree of herkogamy significantly decreased with increased pollinator limitation. Petal length, anther height, and/or the pollen : ovule ratio tended to be low in pollinator- and mate-limited urban populations. One urban population with high pollinator availability had flowers with higher herkogamy and stigma height compared to rural populations. These results suggest that urbanization may provide diverse selective forces that could affect the phenotypic variation in floral traits.

    UNIV CHICAGO PRESS, 2014年08月, AMERICAN NATURALIST, 184 (2), 258 - 267, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 兵庫県西谷地区における準絶滅危惧種スズサイコVincetoxicum pycnostelma Kitag.の繁殖特性及び訪花昆虫相

    中濱直之, 井鷺佑司, 丑丸敦史

    関西自然保護機構, 2014年01月, 地域自然史と保全, 35 (1), 115 - 123, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • Takeshi Osawa, Hiromune Mitsuhashi, Atushi Ushimaru

    Although several studies have demonstrated that disturbance contributes to species' diversity, little emphasis has been placed on the identification of species' coexistence mechanisms related to life history traits. In this study, we compared species' richness and components of plant communities around river confluences to explore how disturbance promotes the coexistence of species with different life history traits. Sites upstream and downstream of confluences are ideal for such comparisons because they draw on the same species' pools and have similar ambient conditions, but differ markedly in the extents of flooding disturbance. We compared sites upstream and downstream of confluences by calculating species' richness and community similarity indices for several life history traits in both summer and spring. In summer, the combined richness of all the species, of annual- and summer-flowering species, was higher downstream from confluences than upstream, but this was not the case for perennials. Similarity analyses suggested that plant communities are constructed according to a neutral process, whereby interactions between the coexisting species are neutral. However, in spring, species' richness was similar upstream and downstream of confluences for all life history traits. Similarity analyses suggested that under these circumstances, the communities were constructed through a species-sorting process i.e., each life history trait had a distinct habitat preference. Thus, the relative strengths of different community assembly processes may change seasonally. We concluded that species groups differing in their responses to disturbance may coexist in a single community. Thus, community structuring following disturbance may involve two processes: a neutral and a species-sorting process. The relative importance of each may vary between species' life history traits and between seasons, and the interaction may account for current community structures. © 2014 Springer Science+Business Media Dordrecht.

    Kluwer Academic Publishers, 2014年, Plant Ecology, 215 (6), 597 - 612, 英語

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    研究論文(学術雑誌)

  • Yuta Uematsu, Atushi Ushimaru

    Examining the causes of interspecific differences in susceptibility to bidirectional land-use changes (land abandonment and use-intensification) is important for understanding the mechanisms of global biodiversity loss in agricultural landscapes. We tested the hypothesis that rare (endangered) plant species prefer wet and oligotrophic areas within topography- and management-mediated resource (soil water content, nutrient, and aboveground biomass) gradients, making them more susceptible to both abandonment and use-intensification of agricultural lands. We demonstrated that topography and management practices generated resource gradients in seminatural grasslands around traditional paddy terraces. Terraced topography and management practices produced a soil moisture gradient within levees and a nutrient gradient within paddy terraces. Both total and rare species diversity increased with soil water content. Total species diversity increased in more eutrophied areas with low aboveground biomass, whereas rare species diversity was high under oligotrophic conditions. Rare and common species were differentially distributed along the human-induced nutrient gradient, with rare species preferring wet, nutrient-poor environments in the agricultural landscapes studied. We suggest that conservation efforts should concentrate on wet, nutrient-poor areas within such landscapes, which can be located easily using land-use and topography maps. This strategy would reduce the costs of finding and conserving rare grassland species in a given agricultural landscape.

    ECOLOGICAL SOC AMER, 2013年09月, ECOLOGICAL APPLICATIONS, 23 (6), 1357 - 1366, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Nakata, K., Ushimaru, A.

    2013年, Behaviour, 150 (1), 103 - 114, 英語

    研究論文(学術雑誌)

  • Chihiro Fukada, Shingo Kaneko, Masashi Yokogawa, Tomiki Kobayashi, Atushi Ushimaru, Yuji Isagi

    Springer Science and Business Media LLC, 2012年06月, Conservation Genetics Resources, 4 (2), 495 - 497, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Tatsunori Iwata, Osamu Nagasaki, Hiroshi S. Ishii, Atushi Ushimaru

    Wiley, 2012年01月, New Phytologist, 193 (1), 196 - 203, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Marina Tsuji, Atushi Ushimaru, Takeshi Osawa, Hiromune Mitsuhashi

    Major drivers of amphibian declines via urbanization include land-use changes that cause loss, fragmentation, splits, and degradation of habitat. The effects of these changes in habitat conditions on the persistence of populations are expected to differ among species depending on their dispersal habits: species with strong site fidelity would likely be more affected by habitat loss and degradation, whereas species with highly dispersive habits would be more threatened by habitat fragmentation and split (the dispersal-dependent-decline hypothesis). To test this hypothesis, we examined the distribution patterns of two paddy-associated frog species (Pelophylax nigromaculatus and Hyla japonica) with different dispersal habits along a rural-urban gradient of the Osaka-Kobe metropolitan area, Japan. Our results partially support the dispersal-dependent-decline hypothesis in that the species with strong site fidelity, i.e., P. nigromaculatus, was threatened by habitat-area (agricultural field) decline and habitat-quality degradation (prevalence of concrete levees) rather than by habitat fragmentation. To the best of our knowledge, our study is the first report that suggests paddy-associated amphibian declines via urbanization in the Asian region. However, the second half of the hypothesis, i.e., that the dispersive species (H. japonica) would be more strongly affected by habitat fragmentation via roads and habitat split via declines in surrounding forests was not supported. The lack of support for this portion of the hypothesis may be due to the high adaptability of H. japonica to artificial landscapes. We discuss the value of the dispersal-dependent-decline hypothesis for conservation planning in agricultural lands of urban areas. (C) 2011 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2011年12月, LANDSCAPE AND URBAN PLANNING, 103 (3-4), 318 - 325, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Takeshi Osawa, Hiromune Mitsuhashi, Yuta Uematsu, Atushi Ushimaru

    Species-occurrence data sets tend to contain a large proportion of zero values, i.e., absence values (zero-inflated). Statistical inference using such data sets is likely to be inefficient or lead to incorrect conclusions unless the data are treated carefully. In this study, we propose a new modeling method to overcome the problems caused by zero-inflated data sets that involves a regression model and a machine-learning technique. We combined a generalized liner model (GLM). which is widely used in ecology, and bootstrap aggregation (bagging), a machine-learning technique. We established distribution models of Vincetoxicum pycnostelma (a vascular plant) and Ninox scutulata (an owl), both of which are endangered and have zero-inflated distribution patterns, using our new method and traditional GLM and compared model performances. At the same time we modeled four theoretical data sets that contained different ratios of presence/absence values using new and traditional methods and also compared model performances. For distribution models, our new method showed good performance compared to traditional GLMs. After bagging, area under the curve (AUC) values were almost the same as with traditional methods, but sensitivity values were higher. Additionally, our new method showed high sensitivity values compared to the traditional GLM when modeling a theoretical data set containing a large proportion of zero values. These results indicate that our new method has high predictive ability with presence data when analyzing zero-inflated data sets. Generally, predicting presence data is more difficult than predicting absence data. Our new modeling method has potential for advancing species distribution modeling. (C) 2011 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2011年09月, ECOLOGICAL INFORMATICS, 6 (5), 270 - 275, 英語

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    研究論文(学術雑誌)

  • Atushi Ushimaru, Motomi Genkai-Kato

    An individual of modular organisms, such as plants and fungi, consists of more than one module that is sometimes physically and physiologically connected with each other. We examined effects of translocation costs, resource-fitness relationships and original resource conditions for modules on the optimal resource translocation strategy for reproductive success in modular organisms with simple models. We considered two types of translocation cost: amount-dependent and ratio-dependent costs. Three optimal resource translocation strategies were recognized: all resource translocation (ART), partial resource translocation (PRT), and no resource translocation (NRT). These strategies depended on the translocation cost, shape of resource-fitness curve, and original resource condition for each module. Generally, a large translocation cost and a concave resource-fitness relationship promoted NRT or PRT. Meanwhile, a small translocation cost and convex resource-fitness relationship facilitated ART. The type of translocation cost did not strongly affect the optimal resource translocation patterns, although ART was never an optimal strategy when the cost was ratio-dependent. Resource translocation patterns found in modular plants were discussed in the light of our model results.

    SPRINGER, 2011年07月, EVOLUTIONARY ECOLOGY, 25 (4), 885 - 898, 英語

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    研究論文(学術雑誌)

  • Takeshi Osawa, Hiromune Mitsuhashi, Hideyuki Niwa, Atushi Ushimaru

    1. While flooding creates diverse habitats for plants and animals in riparian ecosystems, it presents a nuisance to human settlement. Thus, such areas that are frequently disturbed by flooding are more likely to experience strong artificial control measures. 2. This hypothesis was tested and a method was developed to identify these areas using river maps. The effects of two terrain components that could potentially influence flooding frequency (the number of confluences and the degree of meandering per unit area) on both the distribution of threatened species and the degree of artificial modification were examined at two different scales (grid sizes) using two riparian data sources. 3. The numbers of threatened plant species and artificial constructions increased with the number of confluences and the degree of meandering per unit area. The number of threatened plant species was not correlated with the number of artificial constructions. 4. In addition, the results suggest that confluences and meanderings provide different habitat conditions for threatened plant species. Confluences may provide more frequently disturbed habitats, whereas meanderings may provide relatively stable habitats. 5. Based on these results, through flooding, both confluences and meanderings are important for creating and maintaining the diverse habitats used by threatened species, but these habitats are also currently threatened by artificial controls. We suggest that a per-unit-area confluence density and river length map is a helpful tool for locating local biodiversity hot spots. The identification of major reservoirs of biodiversity that are currently threatened can improve conservation and management planning. Copyright (C) 2011 John Wiley & Sons, Ltd.

    WILEY-BLACKWELL, 2011年06月, AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS, 21 (4), 358 - 363, 英語

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    研究論文(学術雑誌)

  • Riyou Tsujino, Noboru Fujita, Masao Katayama, Daiju Kawase, Kiyoshi Matsui, Akihiro Seo, Tetsuya Shimamura, Yasuhiro Takemon, Nozomi Tsujimura, Takakazu Yumoto, Atushi Ushimaru

    We studied vegetation changes in a small floating mat bog in Mizorogaike Pond (Kyoto, Japan), which had experienced a severe decrease in the number and area of hummocks caused by nutrient loading in the 1960s and 1970s, to examine whether reducing the extent of nutrient loading can restore degraded wetland vegetation. However, nutrient loading in the region has been minimized since the 1980s. We examined the distributions of hummocks and Sphagnum cuspidatum mats in 1980, 1988, and 2006, as well as nine major vascular plants that dominated the hollows on the floating mat in 1980 and 2006. The total area of normal hummocks formed by Sphagnum palustre increased from 5865.3 m(2) in 1980 to 5913.6 m(2) in 1988 and 8485.2 m(2) in 2006. The total area of the S. cuspidatum mats also changed, from 416.4 m(2) in 1980 to 322.3 m(2) in 1988 and 1012.5 m(2) in 2006. Examination of the spatial distribution patterns of major plants revealed that emergent plants decreased in the northern part of the mat, but increased in the southern part. Thus, the improved pond water quality was effective at restoring hummocks, although nutrient loading may have caused some irreversible changes in the wetland vegetation.

    Springer Science and Business Media LLC, 2010年12月, Limnology, 11 (3), 289 - 297, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 兵庫県宝塚市西谷地区における里草地の草本植物相.

    植松 裕太, 武田 義明, 丑丸 敦史

    2010年12月, 関西自然保護機構会誌, 32:85-98., 日本語

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    研究論文(学術雑誌)

  • Takeshi Osawa, Hiromune Mitsuhashi, Hideyuki Niwa, Atushi Ushimaru

    Wiley, 2010年11月, Ecological Research, 25 (6), 1161 - 1169, 英語

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    研究論文(学術雑誌)

  • Takeshi Osawa, Hiromune Mitsuhashi, Hideyuki Niwa, Atushi Ushimaru

    Bentham Science Publishers Ltd., 2010年07月22日, The Open Ecology Journal, 3 (1), 48 - 58, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Takeshi Osawa, Hiromune Mitsuhashi, Atushi Ushimaru

    Springer Science and Business Media LLC, 2010年07月, Plant Ecology, 209 (1), 95 - 108, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yuta Uematsu, Tatsuro Koga, Hiromune Mitsuhashi, Atushi Ushimaru

    Elsevier BV, 2010年02月, Agriculture, Ecosystems & Environment, 135 (4), 304 - 309, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Ikumi Dohzono, Yasuoki Takami, Fujio Hyodo

    Springer Science and Business Media LLC, 2009年07月, Oecologia, 160 (4), 667 - 674, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Ryuji Yonekura, Hiroki Yamanaka, Atushi Ushimaru, Kazuaki Matsui, Kimiko Uchii, Atsushi Maruyama

    Asymmetry in the competition abilities between invasive and native consumers can potentially influence the colonization success by invasive species. We tested whether a subsidy of allochthonous prey enhanced an asymmetric competition between invasive bluegill (Lepomis macrochirus) and two native cyprinid fish, that is, stone moroko (Pseudorasbora parva) and tamoroko (Gnathopogon elongatus elongatus). A field experiment was conducted using enclosures wherein the strength of interspecific competition and the presence/absence of allochthonous prey were manipulated. The experiment revealed that allochthonous prey alleviated the limitation of fish growths caused by a severe competition for aquatic prey resources. However, the importance of allochthonous prey differed considerably between invasive bluegill and the two native cyprinids. Individual bluegills grew faster when the allochthonous prey was supplied, whereas no difference in growth was observed in the two cyprinids whether or not allochthonous prey was supplied. Interestingly, the importance of allochthonous prey on the total amount of bluegill growth varied depending on the numerical abundance of native cyprinid competitors, and this importance increased when the native cyprinids were abundant. These findings indicated that allochthonous prey provides an asymmetric growth benefit to invasive bluegills over the two native cyprinids by alleviating asymmetrically the competition strength in a Japanese pond, especially under the conditions of severe interspecific resource competition and a limitation in the utilization of in situ prey resources.

    SPRINGER, 2009年06月, BIOLOGICAL INVASIONS, 11 (6), 1347 - 1355, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 総説へのコメント : なぜ個体は多くの花をもつのか? (コメント,宮地賞受賞者総説)

    丑丸敦史

    2008年, 日本生態学会誌, 58 (3), 170 - 172, 日本語

    研究論文(その他学術会議資料等)

  • Atushi Ushimaru, Chikako Ishida, Shoko Sakai, Mitsue Shibata, Hiroshi Tanaka, Kaoru Niiyama, Tohru Nakashizuka

    Informa UK Limited, 2008年01月, Journal of Apicultural Research, 47 (4), 296 - 303, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Satoshi Kikuchi, Ryuji Yonekura, Atsushi Maruyama, Nao Yanagisawa, Maiko Kagami, Michiko Nakagawa, Suzuki Mahoro, Yukihiko Kohmatsu, Aya Hatada, Shumpei Kitamura, Kensuke Nakata

    We compared the amount of variation in flower size between autogamous and insect-pollinated species to examine the hypothesis that pollinator-mediated selection stabilizes flower size in plant populations. One would expect the flower size variation to be larger in selfing species that are less affected by pollinator-mediated stabilizing selection than in insect-pollinated species. The results of phylogenetic comparisons between autogamous and insect-pollinated flowers supported the pollinator-mediated stabilizing selection hypothesis, although the non-phylogenetic comparison did not. According to our results, we discuss the factors influencing the flower size variation.

    2007年02月14日, Nordic Journal of Botany, 24 (5), 593 - 598, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Takeshi Watanabe, Kensuke Nakata

    Wiley, 2007年02月, American Journal of Botany, 94 (2), 249 - 258, 英語

    [査読有り]

    研究論文(学術雑誌)

  • R. Tsujino, K. Matsui, A. Ushimaru, A. Seo, D. Kawase, H. Uchihashi, K. Suzuki, J. Takahashi, T. Yumoto, Y. Takemon

    2007年, Japanese Journal of Conservation Ecology, 12 (1), 20 - 27, 日本語

    [査読有り]

  • 深泥池湿原へのニホンジカの侵入と植生に対する採食圧

    辻野 亮, 松井 淳, 丑丸 敦史, 瀬尾 明弘, 川瀬 大樹, 内橋 尚妙, 鈴木 健司, 高橋 淳子, 湯本 貴和, 竹門 康弘

    2007年, 保全生態学研究, 12:20-27., 日本語

    [査読有り]

    研究論文(学術雑誌)

  • A. USHIMARU, D. KAWASE, A. IMAMURA

    Wiley, 2006年08月, Functional Ecology, 20 (4), 585 - 591

    [査読有り]

    研究論文(学術雑誌)

  • 科学・技術的課題に対する市民のエンパワーメント・システムの構築

    伊藤 真之, 小川 正賢, 武田 義明, 丑丸 敦史, 田結庄 良昭, 蛯名 邦禎, 近江戸 伸子, 白杉 直子, 長坂 耕作, 田中 成典, 讃岐田 訓, 信川 貴子

    2005年09月, 科教研報, 20・2, 47-51, 日本語

    研究論文(学術雑誌)

  • Why do bilaterally symmetrical flowers orient vertically? Flower orientation influences pollinator landing behaviour

    A Ushimaru, F Hyodo

    Flower orientation is an important character influencing plant fitness. Zygomorphic flowers are known to orient vertically. We conducted field experiments in which we changed the flower angle of zygomorphic Commelina communis to determine how flower orientation affects pollinator behaviour. We confirmed that Commelina flowers oriented vertically like other zygomorphic flowers. Then, we artificially prepared control, upward- and downward-oriented flowers and exposed them to natural pollinators (syrphid flies and bumblebees). We found that the frequency of approach by syrphid flies and bumblebees was not influenced by flower angle, but there were fewer landings on downward-oriented flowers than on control and upward-oriented flowers. Moreover, the upward flower orientation increased illegitimate landings (landing on the flower without touching the stigmas or mating-related anthers) compared with controls. Thus, vertical flower orientation in zygomorphic flowers serves to control pollinator landings. Our findings suggest that deviations from vertical orientation may reduce fitness in C communis by reducing the efficiency of insect-mediated pollen transfer.

    EVOLUTIONARY ECOLOGY LTD, 2005年01月, EVOLUTIONARY ECOLOGY RESEARCH, 7 (1), 151 - 160, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Difference in web construction behavior at newly occupied web sites between two Cyclosa species

    K Nakata, A Ushimaru

    Animals make decisions based on subjective assessments of their environment. To determine their future foraging activities, animals probably assess food availability from past foraging experiences. Thus, foraging also functions as a way for animals to collect information, with the uncertainty of an assessment decreasing as foraging activity increases. This suggests that different needs for a correct assessment may affect the investment made in foraging activities. Orb-web spiders sometimes relocate their webs and relocation rate differs among species. After web relocation, several spider species have been reported to construct the first webs at newly occupied web sites using less silk than usual, possibly to avoid the risk of an overinvestment at sites where food availability has not been determined. Nevertheless, they may pay a cost, because of inadequate decision-making, if webs constructed with less silk convey less information and increase the uncertainty of an assessment. We expect that stronger site tenacity necessitates a greater requirement for correct assessment of web site and the degree to which spiders reduce the amount of web silk in the first web after web relocation is smaller in species that use the same site longer. To test this hypothesis, we examined web construction in two orb-web spiders, Cyclosa octotuberculata and C. argenteoalba. At the same time we found that these two species exhibit different web-site tenacity, as C. octotuberculata does not relocate its webs as frequently as does C. argenteoalba. After artificially induced web relocation, C. argenteoalba constructed webs that were initially smaller and contained only about 2/3 of the silk in control webs that were constructed at the original site. In contrast, C. octotuberculata did not exhibit such decreases in web size or in the amount of web silk used. This result is consistent with our hypothesis.

    BLACKWELL VERLAG GMBH, 2004年05月, ETHOLOGY, 110 (5), 397 - 411, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Satoshi Kikuchi, Ryuji Yonekura, Atsushi Maruyama, Nao Yanagisawa, Maiko Kagami, Michiko Nakagawa, Suzuki Mahoro, Yukihiko Kohmatsu, Aya Hatada, Shumpei Kitamura, Kensuke Nakata

    We compared the amount of variation in flower size between autogamous and insect-pollinated species to examine the hypothesis that pollinator-mediated selection stabilizes flower size in plant populations. One would expect the flower size variation to be larger in, selfing species that are less affected by pollinator-mediated stabilizing selection than in insect-pollinated species. The results of phylogenetic comparisons between autogamous and insect-pollinated flowers supported the pollinator-mediated stabilizing selection hypothesis, although the non-phylogenetic comparison did not. According to our results, we discuss the factors influencing the flower size variation.

    WILEY-BLACKWELL, 2004年, NORDIC JOURNAL OF BOTANY, 24 (5), 593 - 598, 英語

    [査読有り]

    研究論文(学術雑誌)

  • ATUSHI USHIMARU, TOMOYUKI ITAGAKI, HIROSHI S. ISHII

    Wiley, 2003年12月, Plant Species Biology, 18 (2-3), 103 - 106, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Effect of floral organ sizes on female reproductive success in Erythronium japonicum (Liliaceae)

    A Ushimaru, A Fukui, A Imamura

    We examined the effects of floral organ size on female reproductive success in self-incompatible Erythronium japonicum. We measured tepal size and anther-stigma separation and investigated the relationship between these measurements and fruiting and seeding success. We found that tepal length was positively correlated with fruiting success and the number of seeds per fruit. This suggests that pollinator attraction is affected by tepal length in E. japonicum and that the number of pollinator visits affects female reproductive success. Anther-stigma separation was the most variable floral trait measured and was not correlated with either fruiting or seeding success in this species, suggesting that the proportion of outcross pollen deposited on stigmas by pollinators does not increase with anther-stigma separation. This is inconsistent with a previous report on Etyyhtonium. grandiflorum. Pollinator size might explain this interspecific difference in the effect of anther-stigma separation on female reproductive success.

    BOTANICAL SOCIETY OF KOREA, 2003年12月, JOURNAL OF PLANT BIOLOGY, 46 (4), 245 - 249, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Variation in floral organ size depends on function: a test with Commelina communis, an andromonoecious species

    A Ushimaru, T Itagaki, HS Ishii

    We measured the size of floral organs in andromonoecious Conirnelina communis to test the hypothesis that pollinator-mediated selection might regulate variation in the size of floral organs. We compared variation in floral organ size between C. communis perfect flowers, with fertile pistils, and C. communis staminate flowers, with sterile pistils. We hypothesized that variation in size of the sexually functionless pistil would be large. We found supporting evidence from eight C. communis populations. These results suggest that pollinator-mediated selection may have stabilized variation in the style length of perfect flowers. We also found differences in variation in length among three different types of anthers in both perfect and staminate flowers, only two of which produce fertile pollen. This is consistent with our prediction that mating-related organs should vary less in size than attraction-related organs.

    EVOLUTIONARY ECOLOGY LTD, 2003年05月, EVOLUTIONARY ECOLOGY RESEARCH, 5 (4), 615 - 622, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Using past experience in web relocation decisions enhances the foraging efficiency of the spider Cyclosa argenteoalba

    K Nakata, A Ushimaru, T Watanabe

    The purpose of this study is to test whether the integration of past and present foraging experience in web relocation decision enhances foraging efficiency of the spider Cyclosa argenteoalba in its natural environment. We measured daily changes in the prey availability at several fixed sites in a natural environment and constructed a model environment based on these observational data. In the model environment, we simulated the behavior of spiders that foraged and relocated their webs according to several decision rules, which differed in terms of how a spider used its past experience. Results of the simulation revealed that the less past experience is discounted in making web relocation decisions, the more prey the spider is expected to capture. The expected number of web relocations decreased as spiders kept past foraging experience longer. These results suggest that C. argenteoalba enhances foraging efficiency by using past foraging experience for long times in the decision of web relocation in its natural environment.

    KLUWER ACADEMIC/PLENUM PUBL, 2003年05月, JOURNAL OF INSECT BEHAVIOR, 16 (3), 371 - 380, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 白神山地における異なった構造をもつブナ林の動態モニタリング.

    1. 中静 透,斎藤宗勝,松井 淳,蒔田明史,神林友広,正木 隆,長池卓男,杉田久志,金指達郎,関剛,太田敬之,櫃間 岳,八木貴信,橋本徹,酒井暁子,壁谷大介,高田克彦,星崎和彦,丑丸敦史,阿部みどり,大場信太郎,福田貴文,新井伸昌,上迫正人,田中健太,市栄智明,鈴木まほろ,乾陽子,中川弥智子,黒川紘子,藤森直美,鮫島弘光,畑田 彩,堀真人,沢田信一

    2003年, 東北森林学会誌, 8, 67 - 74, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • The evolution of flower allometry in selfing species

    A Ushimaru, K Nakata

    Allometric relationships of floral organs were compared in related outcrossing (herkogamous) and selfing (autonomously self-pollinated) species in the genera Mazus and Hosta to determine how floral traits have evolved under selection favouring autonomous self-pollination. Autogamous Scutellaria dependens was also examined. We measured several floral traits in the five species. Selfing species had a steeper slope of the log-log regression and correlation coefficient for the filament-stigma height relationship than related outcrossing species. In three selfing species, the filament-stigma correlation was stronger than the petal-filament and petal-stigma correlations. Outcrossing species had weaker filament-stigma correlations than the other correlations. These findings suggest that, in selfing species, the placement of the stigma close to the anthers has evolved under selection favouring autogamy and that filament-stigma correlations might have evolved together with mating-system evolution in flowering plants.

    EVOLUTIONARY ECOLOGY LTD, 2002年12月, EVOLUTIONARY ECOLOGY RESEARCH, 4 (8), 1217 - 1227, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Akio Imamura

    We investigated floral size variation and the relationship between floral display and pollinator and predispersal seed predator attraction in an achlorophyllous, myco-heterotrophic plant, Monotropastrum globosum. We found substantial variation in flower size in this species, similar to reports for other myco-heterotrophic plants. We examined the effects of flower size and number on female reproductive success by measuring pollination and fruiting success and predispersal seed predation. We found no evidence that pollinators (bumblebees) responded to either flower size or number, but predispersal seed predators (Lepidopteran larvae) preferred plants with larger, more numerous flowers, although predation frequency was not high. Therefore, we did not detect any effect of larger floral displays on female reproductive success in this species. Flower size independent pollination success and low predation pressure might allow the large floral size variation in M. globosum. The percentage of fruiting flowers was lower than that of pollinated flowers and larger flowers tended to set fruit more often than smaller ones, suggesting that fruit set in M. globosum is resource-limited.

    2002年12月, Plant Species Biology, 17 (2-3), 147 - 153, 英語

    [査読有り]

    研究論文(学術雑誌)

  • T Watanabe, T Tanigaki, H Nishi, A Ushimaru, T Takeuchi

    We conducted a quantitative analysis of geographic color variation in two species of dung beetles: Geotrupes auratus and G. laevistriatus. The reflectance of the dorsal surfaces was measured from 300 to 700 nm using a spectrophotometer. The reflectance curves for both beetles were bimodal; there were two distinct peaks, namely, the a peak, between 400 and 700 nm, and the beta peak at around 300 nm. A stepwise discriminant analysis indicated that geographic color variation in Geotrupes beetles was primarily characterized by a shift of the a peak. Using beetles from three locations, we compared the wavelength (nm) of the alpha peak (lambdamax(alpha)) and its reflectance intensity (R(alpha)) to investigate sex and population differences. Intraspecific geographic variation in coloration was effectively detected by discriminant analysis of spectral reflectance curves. Our results showed that G. auratus and G. laevistriatus had similar coloration within each sampling location. Our study also revealed hidden sex differences in R(alpha); R(alpha) of males were significantly higher than those of females in both species. Since the dorsal surface of the beetles shows remarkable color variation, and coloration can be assessed objectively using reflectance spectra, Geotrupes beetles may be good model organisms to investigate geographic color variation.

    ZOOLOGICAL SOC JAPAN, 2002年03月, ZOOLOGICAL SCIENCE, 19 (3), 351 - 358, 英語

    [査読有り]

    研究論文(学術雑誌)

  • KIYOSHI MATSUI, Atushi USHIMARU, NOBORU FUJITA

    Wiley, 2001年12月, Plant Species Biology, 16 (3), 231 - 235, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Kensuke Nakata

    University of Chicago Press, 2001年11月, International Journal of Plant Sciences, 162 (6), 1307 - 1311, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Kiyoshi Matsui

    Wiley, 2001年08月, Nordic Journal of Botany, 21 (4), 397 - 399, 英語

    [査読有り]

    研究論文(学術雑誌)

  • KENSUKE NAKATA, ATUSHI USHIMARU

    Elsevier BV, 1999年06月, Animal Behaviour, 57 (6), 1251 - 1255, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Atushi Ushimaru, Kihachiro Kikuzawa

    Wiley, 1999年03月, American Journal of Botany, 86 (3), 436 - 446, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Idoia Biurrun, Remigiusz Pielech, Iwona Dembicz, François Gillet, Łukasz Kozub, Corrado Marcenò, Triin Reitalu, Koenraad Van Meerbeek, Riccardo Guarino, Milan Chytrý, Robin J. Pakeman, Zdenka Preislerová, Irena Axmanová, Sabina Burrascano, Sándor Bartha, Steffen Boch, Hans Henrik Bruun, Timo Conradi, Pieter De Frenne, Franz Essl, Goffredo Filibeck, Michal Hájek, Borja Jiménez‐Alfaro, Anna Kuzemko, Zsolt Molnár, Meelis Pärtel, Ricarda Pätsch, Honor C. Prentice, Jan Roleček, Laura M. E. Sutcliffe, Massimo Terzi, Manuela Winkler, Jianshuang Wu, Svetlana Aćić, Alicia T. R. Acosta, Elias Afif, Munemitsu Akasaka, Juha M. Alatalo, Michele Aleffi, Alla Aleksanyan, Arshad Ali, Iva Apostolova, Parvaneh Ashouri, Zoltán Bátori, Esther Baumann, Thomas Becker, Elena Belonovskaya, José Luis Benito Alonso, Asun Berastegi, Ariel Bergamini, Kuber Prasad Bhatta, Ilaria Bonini, Marc‐Olivier Büchler, Vasyl Budzhak, Álvaro Bueno, Fabrizio Buldrini, Juan Antonio Campos, Laura Cancellieri, Marta Carboni, Tobias Ceulemans, Alessandro Chiarucci, Cristina Chocarro, Luisa Conti, Anna Mária Csergő, Beata Cykowska‐Marzencka, Marta Czarniecka‐Wiera, Marta Czarnocka‐Cieciura, Patryk Czortek, Jiří Danihelka, Francesco Bello, Balázs Deák, László Demeter, Lei Deng, Martin Diekmann, Jiri Dolezal, Christian Dolnik, Pavel Dřevojan, Cecilia Dupré, Klaus Ecker, Hamid Ejtehadi, Brigitta Erschbamer, Javier Etayo, Jonathan Etzold, Tünde Farkas, Mohammad Farzam, George Fayvush, María Rosa Fernández Calzado, Manfred Finckh, Wendy Fjellstad, Georgios Fotiadis, Daniel García‐Magro, Itziar García‐Mijangos, Rosario G. Gavilán, Markus Germany, Sahar Ghafari, Gian Pietro Giusso del Galdo, John‐Arvid Grytnes, Behlül Güler, Alba Gutiérrez‐Girón, Aveliina Helm, Mercedes Herrera, Elisabeth M. Hüllbusch, Nele Ingerpuu, Annika K. Jägerbrand, Ute Jandt, Monika Janišová, Philippe Jeanneret, Florian Jeltsch, Kai Jensen, Anke Jentsch, Zygmunt Kącki, Kaoru Kakinuma, Jutta Kapfer, Mansoureh Kargar, András Kelemen, Kathrin Kiehl, Philipp Kirschner, Asuka Koyama, Nancy Langer, Lorenzo Lazzaro, Jan Lepš, Ching‐Feng Li, Frank Yonghong Li, Diego Liendo, Regina Lindborg, Swantje Löbel, Angela Lomba, Zdeňka Lososová, Pavel Lustyk, Arantzazu L. Luzuriaga, Wenhong Ma, Simona Maccherini, Martin Magnes, Marek Malicki, Michael Manthey, Constantin Mardari, Felix May, Helmut Mayrhofer, Eliane Seraina Meier, Farshid Memariani, Kristina Merunková, Ottar Michelsen, Joaquín Molero Mesa, Halime Moradi, Ivan Moysiyenko, Michele Mugnai, Alireza Naqinezhad, Rayna Natcheva, Josep M. Ninot, Marcin Nobis, Jalil Noroozi, Arkadiusz Nowak, Vladimir Onipchenko, Salza Palpurina, Harald Pauli, Hristo Pedashenko, Christian Pedersen, Robert K. Peet, Aaron Pérez‐Haase, Jan Peters, Nataša Pipenbaher, Chrisoula Pirini, Eulàlia Pladevall‐Izard, Zuzana Plesková, Giovanna Potenza, Soroor Rahmanian, Maria Pilar Rodríguez‐Rojo, Vladimir Ronkin, Leonardo Rosati, Eszter Ruprecht, Solvita Rusina, Marko Sabovljević, Anvar Sanaei, Ana M. Sánchez, Francesco Santi, Galina Savchenko, Maria Teresa Sebastià, Dariia Shyriaieva, Vasco Silva, Sonja Škornik, Eva Šmerdová, Judit Sonkoly, Marta Gaia Sperandii, Monika Staniaszek‐Kik, Carly Stevens, Simon Stifter, Sigrid Suchrow, Grzegorz Swacha, Sebastian Świerszcz, Amir Talebi, Balázs Teleki, Lubomír Tichý, Csaba Tölgyesi, Marta Torca, Péter Török, Nadezda Tsarevskaya, Ioannis Tsiripidis, Ingrid Turisová, Atushi Ushimaru, Orsolya Valkó, Carmen Van Mechelen, Thomas Vanneste, Iuliia Vasheniak, Kiril Vassilev, Daniele Viciani, Luis Villar, Risto Virtanen, Ivana Vitasović‐Kosić, András Vojtkó, Denys Vynokurov, Emelie Waldén, Yun Wang, Frank Weiser, Lu Wen, Karsten Wesche, Hannah White, Stefan Widmer, Sebastian Wolfrum, Anna Wróbel, Zuoqiang Yuan, David Zelený, Liqing Zhao, Jürgen Dengler

    Wiley, 2021年07月, Journal of Vegetation Science, 32 (4), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Koki R. Katsuhara, Yuuya Tachiki, Ryosuke Iritani, Atushi Ushimaru

    Wiley, 2021年09月16日, Journal of Ecology, 英語

    [査読有り]

    研究論文(学術雑誌)

  • K. Murakami, K. R. Katsuhara, A. Ushimaru

    Wiley, 2022年01月06日, Plant Biology, 英語

    [査読有り]

    研究論文(学術雑誌)

MISC

  • 日本生態学会全国大会賞(ポスター賞)最優秀賞_2

    岩知道優樹, 内田圭, 横田樹広, 丑丸敦史, 佐々木雄大

    2018年, 第65回日本生態学会

  • 環境科学会2016年会.最優秀発表賞 (富士電機賞)

    青島一平, 内田圭, 丑丸敦史, 佐藤真行

    2016年

  • 日本生態学会全国大会賞(ポスター賞)最優秀賞_1

    長井拓馬, 丑丸敦史, 内田圭

    2016年, 第63回日本生態学会

  • Excellent Poster Award

    Kei Uchida, Atushi Ushimaru

    2013年, The 59th Ecological Society of Japan and the 5th East Asian Federation of Ecological Societies

  • 都市緑地が主観的な緑量や満足度に与える影響の分析

    青島一平, 内田圭, 丑丸敦史, 田畑智博, 佐藤真行

    2017年, 環境情報科学, 46 (1)

  • 369 Finding new links in an alpine pollination network by examining pollen deposited on the insect body surfaces

    Nikkeshi A., Shinjyou K., Ushimaru A., Ishii H.

    日本花粉学会, 2012年08月23日, 日本花粉学会会誌, 58, 168 - 168, 英語

書籍等出版物

  • 生態学

    武田, 義明

    分担執筆, 生物の適応進化;生物多様性, 化学同人, 2021年03月, 日本語, ISBN: 9784759811087

  • 草地と日本人 : 縄文人からつづく草地利用と生態系

    須賀, 丈, 岡本, 透, 丑丸, 敦史

    共著, 畔の上の草地ー里草地, 築地書館, 2019年02月, 日本語, ISBN: 9784806715764

  • 雑草学入門

    山口, 裕文, 宮浦, 理恵, 松嶋, 賢一, 下野, 嘉子

    分担執筆, 水田畦畔草地の生物多様性, 講談社, 2018年09月, 日本語, ISBN: 9784065129524

  • Grasslands of the world: diversity, management and conservation

    Victor R. Squires, Jürgen Dengler, Limin Hua, Haiying Feng

    分担執筆, Grassland biodiversity in Japan: threats, management and conservation., CRC Press, Boca Raton, US., 2018年08月, 英語, Under the temperate humid climate of the Holocene in Japan, most vegetation potentially would change into forests by ecological succession. Harsh environments, natural disturbances and or human activities, however, have sustained natural and semi-natural grasslands until today. The grassland types vary, depending on locations and management forms, and the aims of using semi-nat

    学術書

  • 進化学事典

    日本進化学会

    分担執筆, 自殖; 有性生殖; 無性生殖, 共立出版, 2012年04月, 日本語, ISBN: 9784320057777

  • 草地と日本人 : 日本列島草原1万年の旅

    須賀, 丈, 岡本, 透, 丑丸, 敦史

    築地書館, 2012年02月, 日本語, ISBN: 9784806714347

  • 深泥池の自然と暮らし : 生態系管理をめざして

    深泥池七人会編集部会

    分担執筆, ミズオトギリ−14種もの狩蜂が吸蜜に−; モウセンゴケは昆虫の敵か?味方か?., サンライズ出版, 2008年03月, 日本語, ISBN: 9784883253579

  • 進化で読み解くふしぎな生き物 : シンカのかたち

    北海道大学CoSTEPサイエンスライターズ, 宮本, 拓海, 遊磨, 正秀, 丑丸, 敦史

    監修, 技術評論社, 2007年05月, 日本語, ISBN: 9784774130620

  • プラントミメティックス : 植物に学ぶ

    鈴木, 泰博, 高林, 純示, 福崎, 英一郎, 福田, 裕穂, 湯本, 貴和, 甲斐, 昌一, 森川, 弘道

    分担執筆, 花標に学ぶ送粉共生系, エヌ・ティー・エス, 2006年08月, 日本語, ISBN: 4860431316

  • 花生態学の最前線 : 美しさの進化的背景を探る

    種生物学会

    分担執筆, 両性花における自家和合性と自動的自家受粉の進化, NetLibrary, 1999年, 日本語, ISBN: 9784829911396

講演・口頭発表等

  • 水田生態系における土地利用変化による送粉ネットワーク・送粉サービスへの影響

    丑丸敦史, 清水健将, 平岩将良

    第68回日本生態学会, 2021年03月21日, 日本語

    シンポジウム・ワークショップパネル(公募)

  • 直接観察とインターバル撮影カメラを用いた島根県赤名湿地における訪花昆虫群集の解明

    渡津友博, 保坂哲朗, 平岩将良, 井上雅仁, 三島秀夫, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • ケツユクサの可塑的な性決定メカニズム:花序内の資源動態に着目して

    佐藤弘大, 宮崎 祐子, 勝原光希, 邑上夏菜, 廣部宗, 兵藤不二夫, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 草原の時間的連続性が地表徘徊性甲虫群集に与える影響

    井上太貴, 矢井田友暉, 小粥隆弘, 伊藤昇, 丑丸敦史, 田中健太

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 春から初夏におけるナミアゲハの訪花傾向:野外観察と体表花粉の分析

    南木悠, 日下石碧, 寺井洋平, 丑丸敦史, 木下充代

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 送粉系群集における、送粉者の分類群組成と花形質組成の季節推移

    白鳥裕太郎, 角屋真澄, 辻本翔平, 丑丸敦史, 石井博

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 斜面に生育するテンナンショウ属植物の花序はどこを向くのか?

    川上風馬, 松本哲也, 中田泰地, 矢井田友暉, 大西麻衣, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

  • 開花密度が繁殖成功に及ぼす影響~放射相称花・左右相称花間の比較~

    佐藤秋周, 中田泰地, 川上風馬, 白鳥裕太郎, 石井博, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 棚田の圃場整備による外来植物種の侵入が送粉ネットワークに及ぼす影響

    平山楽, 冨田誠之, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 水田において圃場整備と耕作放棄が畦畔の植物-送粉者ネットワークに与える影響

    冨田誠之, 平山楽, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 多様な都市生育地は一年生草本の表現型の集団間変異を促進するか?

    中田泰地, 増田佳奈, 佐藤秋周, 川上風馬, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 造成されたスキー場の草原性植物の多様性は種子の散布制限の影響を受けるか

    矢井田友暉, 中田泰地, 田中健太, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • ツユクサの花形質の集団間変異は送粉環境への適応か?:野外調査と栽培実験による検証

    増田佳奈, 邑上夏菜, 勝原光希, 宮崎祐子, 丑丸敦史

    第68回日本生態学会, 2021年03月18日, 日本語

    ポスター発表

  • 訪花者群集の組成に応じた、植物群集の花形質組成

    石井博、辻本翔平、丑丸敦史、工藤岳

    第67回日本生態学会, 2020年03月08日

  • 雄性両全性同株ケツユクサの個花における日長と養分環境依存的性決定

    宮崎祐子、佐藤弘大、井上智美、赤路康朗、勝原光希、邑上夏菜、丑丸敦史

    第67回日本生態学会, 2020年03月08日

  • 島根県赤名湿地における花の形質と訪花昆虫群集の関係

    渡津友博、保坂哲朗、井上雅仁、三島秀夫、丑丸敦史

    第67回日本生態学会, 2020年03月07日

  • 野外観察と花粉分析によるアゲハチョウの訪花行動の解明

    南木悠、日下石碧、寺井洋平、丑丸敦史、木下充代

    第67回日本生態学会, 2020年03月07日

  • カラスウリの花におけるフリンジ状花弁の適応的意義

    瀬尾夏未、 船本大智、 阪上洸多、丑丸敦史

    第67回日本生態学会, 2020年03月07日

  • 都市域と里山域での自殖率の集団間比較:一年生草本ツユクサを用いて

    増田佳奈、邑上夏菜、 勝原光希、宮崎祐子、丑丸敦史

    第67回日本生態学会, 2020年03月07日

  • 水田における土地利用の変化が畦畔の植物-送粉者ネットワークの構造に及ぼす影響

    冨田誠之, 平山楽, 丑丸敦史

    第67回日本生態学会, 2020年03月07日

  • 都市-里山環境傾度で植物の機能形質の種内変異を起こす要因

    中田泰地、矢井田友暉、勝原光希、丑丸敦史

    第67回日本生態学会, 2020年03月07日

  • 草原性絶滅危惧種キキョウの繁殖生態—花の咲く向きに着目して—

    中田 泰地、矢井田 友暉、石井 凜、勝原 光希、丑丸 敦史

    第51回種生物学シンポジウム 宮崎、2019年12月, 2019年12月, 日本語

  • Evolution of large flowers adapted to small pollinators in oceanic islands.

    Hiraiwa MK and Ushimaru A

    Island biology 2019: III International Conference on Island Evolution, Ecology, and Conservation, 2019年07月11日, 英語

    ポスター発表

  • Community-wide difference in floral traits between continental and oceanic island coastal plants.

    Ushimaru A and Hiraiwa MK

    Island biology 2019: III International Conference on Island Evolution, Ecology, and Conservation, 2019年07月11日, 英語

    口頭発表(一般)

  • 林縁性草本ホタルカズラの送粉成功における被陰・被覆の影響

    石井凜, 勝原光希, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 雄性両全性同株植物ツユクサにおける可塑的な雄花生産

    勝原光希, 邑上夏菜, 丑丸敦史

    第66回日本生態学会, 2019年03月, 日本語, 国内会議

    口頭発表(一般)

  • 埋土種子の減少と種子散布制限は新しく建設されたスキー場の草原性植物組成を決定する

    矢井田友暉, 井上太貴, 田中健太, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 放棄畦畔への草刈り再導入による植物多様性の再生ー5年間の再生実験の成果ー

    高島敬子, 長井拓馬, 上原勇樹, 勝原光希, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 都市化は植物の機能形質を変化させるか?阪神地区の水田における検証

    中田泰地, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 都市化による植物群集の花色組成変化

    田中奎佑, 平岩将良, 清水健将, 中田泰地, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 地域的攪乱レジームが種プールの対攪乱応答を変化させる

    上原勇樹, 瀧本岳, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 送粉環境と花形質が自殖率に与える影響:ツユクサの集団間変異を用いた検証

    邑上夏菜, 勝原光希, 宮崎祐子, 丑丸敦史

    第68回日本生態学会, 2019年03月, 日本語, 国内会議

    ポスター発表

  • 送粉ネットワークのジェネラリスト化による送粉機能への影響ー都市と島の生態系を例に

    平岩将良, 清水健将, 丑丸敦史

    第67回日本生態学会, 2019年03月, 日本語, 国内会議

    口頭発表(一般)

  • 雄性両全性同株植物ツユクサにおける花形態の性的二型性:送粉プロセスに着目して

    邑上夏菜, 勝原光希, 丑丸敦史

    第50回種生物学シンポジウム, 2018年12月, 日本語, 国内会議

    ポスター発表

  • 自殖の進化は繁殖干渉下の共存を促進するか:個体ベースモデルを用いたシミュレーション

    勝原光希, 立木佑弥, 入谷亮介, 丑丸敦

    第50回種生物学シンポジウム, 2018年12月, 日本語, 国内会議

    ポスター発表

  • The impact of biodiversity in river on valuation of urban ecosystem services: the case of Hanshin region using eDNA and the residents' life satisfaction data

    AOSHIMA Ippei, NAKAO Ryohei, MINAMOTO Toshifumi, USHIMARU Atushi, SATO Masayuki

    The 65th Annual Meeting of Ecological Society of Japan, 2018年03月, 英語, Sapporo Convention Center, Sapporo, Japan, 国際会議

    口頭発表(一般)

  • 風媒・風散布の雌雄異株植物スイバの花序構造:性的二型性とメスのジレンマ

    松久聖子, 丑丸敦史

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 都市化による機能群多様性の減少が植物‐送粉者ネットワークに与える影響

    清水健将, 平岩将良, 丑丸敦史

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 地域的な攪乱頻度に応じた種プールの構築

    上原勇樹, 瀧本岳, 丑丸敦史

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 植生履歴が植物相形成に与える影響

    矢井田友暉, 田中健太, 小黒和也, 長井拓馬, 内田圭, 勝原光希, 丑丸敦史

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 自然環境と満足度~都市の生活と生態系サービス~

    青島一平, 内田圭, 丑丸敦史, 佐藤真行

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 耕作放棄地における管理の再導入による植物種の多様性の再生―機能形質による再生プロセ スの解明に向けて―

    髙島敬子, 上原勇樹, 長井拓馬, 丑丸敦史

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 環境DNA分析手法に基づいて作成した生息適地モデルの評価ーオオサンショウウオ(Andrial japonicus)を例にー

    日高舜介, 勝原光希, 富田勢, 丑丸敦史, 山本哲史, 源利文

    第64回日本生態学会大会, 2017年03月, 日本語, 早稲田大学(東京都), 国内会議

    口頭発表(一般)

  • 花の空間分布が送粉者および捕食者の分布に与える影響

    丑丸敦史, 勝原光希, 中田兼介, 石井博, 北村俊平

    第64回日本生態学会大会, 2017年03月, 日本語, 東京、早稲田大学, 国内会議

    ポスター発表

  • 環境DNAを用いたオオサンショウウオの生息適地モデルの作成と評価

    日高舜介, 勝原光希, 富田勢, 丑丸敦史, 山本哲史, 源利文

    第81回日本陸水学会大会, 2016年11月, 日本語, 琉球大学(沖縄県), 国内会議

    口頭発表(一般)

  • Estimating the distribution of the Japanese giant salamander (Andrias japonicus) by ecological niche modeling based on environmental DNA detection

    MINAMOTO Toshifumi, HIDAKA Shunsuke, KATSUHARA Koki, TOMITA Sei, YAMAMOTO Satoshi, USHIMARU Atushi

    Ecological Society of America Annual Meeting 2016, 2016年08月, 英語, Fort Lauderdale, Florida, U.S.A., 国際会議

    ポスター発表

  • Spatiotemporal variation in pollinator species and functional diversity influences the structure of pollination networks in Japanese islands

    Atushi Ushimaru, Masayoshi K Hiraiwa

    Island biology 2016: II International Conference on Island Evolution, Ecology, and Conservation, 2016年07月, 英語, Terceira island, Azores, Portugal., 国際会議

    [招待有り]

    口頭発表(一般)

  • Low pollinator functional diversity in oceanic islands influences pollnators’ floral niches

    Masayoshi K Hiraiwa, Atushi Ushimaru

    Island biology 2016: II International Conference on Island Evolution, Ecology, and Conservation, 2016年07月, 英語, Terceira island, Azores, Portugal., 国際会議

    口頭発表(一般)

  • 風媒の雌雄異株植物スイバの形態に性的二型性はあるか

    松久聖子, 丑丸敦史

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    口頭発表(一般)

  • 土地利用変化がトノサマガエルの食性に与える影響

    青木香澄, 丑丸敦史, 兵藤不二夫

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • 都市化が送粉ネットワークにもたらす影響

    清水健将, 丑丸敦史

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • 伝統的管理の実験的導入による里草地再生

    長井拓馬, 丑丸敦史, 内田圭

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • 低い送粉者の機能的多様性が形態のミスマッチを引き起こす

    平岩将良, 丑丸敦史

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • 送粉者機能群多様性と送粉ネットワーク構造の関係

    丑丸敦史, 平岩将良

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • 高山帯と低地帯(里草地)で訪花昆虫相・送粉効率は異なるのか?

    日下石碧, 丑丸敦史, 石井博

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • 環境DNA分析手法を用いたオオサンショウウオ(Andrias japonicus)の広域調査

    日髙舜介, 勝原光希, 冨田勢, 丑丸敦史, 源利文

    第63回日本生態学会大会, 2016年03月, 日本語, 宮城県仙台市(仙台国際センター), 国内会議

    ポスター発表

  • メガシティにおける植物および植食性昆虫の機能的多様性評価

    藤本泰樹, 丑丸敦史, 内田圭

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • マルチプレックスPCRを用いた兵庫県内のため池における在来魚と外来魚の分布状況の把握

    福岡有紗, 丑丸敦史, 源利文

    第63回日本生態学会大会, 2016年03月, 日本語, 宮城県仙台市(仙台国際センター), 国内会議

    [招待有り]

    シンポジウム・ワークショップパネル(指名)

  • ツユクサ属2品種における雄花生産の季節変化とその要因

    邑上夏菜, 勝原光希, 丑丸 敦史

    第63回日本生態学会大会, 2016年03月, 日本語, 仙台, 国内会議

    ポスター発表

  • Koki Katsuhara,Atushi Ushimaru,Shumpei Kitamura Functional significance of inconspicuous petals in scent-attracted flowers

    KATSUHARA KOKI, USHIMARU ATUSHI, KITAMURA SHUMPEI

    第63回日本生態学会大会, 2016年03月, 英語, 仙台, 国内会議

    口頭発表(一般)

  • Environmental DNA Assessment of Rare Endemic Species and Closely Related Exotic Species: A Case Study of Giant Salamanders in Japan

    MINAMOTO Toshifumi, FUKUKMOTO Sou, HIDAKA Shunsuke, USHIMARU Atushi

    2015 Society of Wetland Scientist Annual Meeting, 2015年06月, 英語, Providence, Rhode Island, USA, 国際会議

    [招待有り]

    シンポジウム・ワークショップパネル(指名)

  • 放棄水田畦畔の植物多様性は再生するのか −草刈実験による検討−

    長井拓馬, 丑丸 敦史, 内田圭, 日置千絵

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 風媒の雌雄異株植物における開花スケジュールの性的二型性

    松久聖子, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 農地管理の違いによる送粉ネットワーク構造の変化

    日下石碧, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 同所的に存在するツユクサとケツユクサにおける繁殖干渉の可能性

    勝原光希, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 島嶼において送粉者は小型化するのか?ー本州と伊豆諸島の比較ー

    平岩将良, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    口頭発表(一般)

  • 都市水田畦畔における開花高の高い植物の消失

    畑田真紀子, 内田圭, 藤本泰樹, 平岩将良, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 都市化による植物および植食性昆虫多様性の減少 -種組成は均質化しているのか-

    内田圭, 藤本泰樹, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 都市における花形質の多様化

    丑丸 敦史, 小林敦美, 堂囿いくみ

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島, 国内会議

    ポスター発表

  • 草原面積の縮小が草原性絶滅危惧蝶類の遺伝的多様性に与える影響-標本を用いた過去と現在の比較解析-

    中濱直之, 内田圭, 丑丸 敦史, 井鷺裕司

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • 阪神地区における都市水田の生物多様性ー都市化の影響とその保全ー

    藤本泰樹, 内田圭, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    [招待有り]

    口頭発表(招待・特別)

  • 環境DNA分析を用いた希少在来種と近縁外来種の流域スケール調査:京都府桂川のオオサンショウウオを例に

    福本想, 丑丸敦史, 源利文

    日本生態学会第62回全国大会, 2015年03月, 日本語, 鹿児島県鹿児島市, 国内会議

    口頭発表(一般)

  • 環境DNAとマルチプレックスPCRを用いた複数魚種の同時検出

    福岡有紗, 丑丸敦史, 源利文

    日本生態学会第62回全国大会, 2015年03月, 日本語, 鹿児島県鹿児島市, 国内会議

    ポスター発表

  • トノサマガエルの減少メカニズムの解明~土地利用形態による餌資源変化の検討~

    青木香澄, 丑丸 敦史

    第62回日本生態学会大会, 2015年03月, 日本語, 鹿児島大, 国内会議

    ポスター発表

  • A basin-scale application of environmental DNA assessment for rare endemic and exotic giant salamander species in Japan

    MINAMOTO Toshifumi, FUKUMOTO Sou, USHIMARU Atushi

    Joint 2014 Annual Meeting British Ecological Society and Société Française d’Ecologie, 2014年12月, 英語, Lille, France, 国際会議

    ポスター発表

  • 立山高山帯における訪花昆虫体表付着花粉と柱頭付着花粉の関係

    日下石 碧, 新庄 康平, 久保田 将裕, 居村 尚, 石井 博, 丑丸 敦史

    第61回日本生態学会大会, 2014年03月, 日本語, 広島, 国内会議

    ポスター発表

  • 半自然草原における生物多様性の減少メカニズム-多群集での検証

    丑丸 敦史, 内田 圭

    第61回日本生態学会大会, 2014年03月, 日本語, 広島, 国内会議

    ポスター発表

  • 送粉者相の異なる島嶼間の送粉ネットワークの比較

    平岩 将良, 丑丸 敦史

    第61回日本生態学会大会, 2014年03月, 日本語, 広島, 国内会議

    ポスター発表

  • Large-scale environmental DNA assessment for Japanese and Chinese giant salamanders in Katsura River, Japan

    FUKUMOTO Sou, USHIMARU Atushi, MINAMOTO Toshifumi

    Frontiers in Amphibian Biology: Endangered Species Conservation and Genome Editing, 2014年03月, 英語, Higashi-Hiroshima City, Japan, 国際会議

    ポスター発表

  • 環境DNAを用いた在来および外来オオサンショウウオの検出

    福本想, 丑丸敦史, 源利文

    日本陸水学会第78回大会, 2013年09月, 日本語, 滋賀県大津市, 国内会議

    口頭発表(一般)

  • Spatial and temporal beta-diversity of herbivorous insects declines due to land-use changes in agricultural semi-natural grasslands in Japan.

    Uchida K, Ushimaru A

    INTECOL, 2013年08月, 英語, London, 国際会議

    ポスター発表

  • Does Intermediate Disturbance Hypothesis explain mechanisms of biodiversity decline in agricultural lands? Perennial plants play key roles in maintaining herbivorous insect diversity.

    K Uchida, A Ushimaru

    The 97th Annual Meeting of Ecological Society of America, 7 Auguest 2012, Portland., 2012年08月, 英語, 国際会議

    ポスター発表

  • The relationship between the Pollen/Ovule ratio and functional group diversity of pollinators in flowering plants.

    A Nikkeshi, A Ushimaru

    The 59th Annual Meeting of Ecological Society of Japan & The 5th EAFES international Congress, 18 March 2012, 2012年03月, 英語, Otsu, Ryokoku University., 国際会議

    ポスター発表

  • Mechanism of decrease in herbivorous insects diversity in semi-natural grassland - Effects of changes in plant community –.

    K Uchida, A Ushimaru

    The 59th Annual Meeting of Ecological Society of Japan & The 5th EAFES international Congress, 18 March 2012, 2012年03月, 英語, Otsu, Ryokoku University., 国際会議

    ポスター発表

  • Effects of urbanization on genetic structures in two paddy-associated frog species with different dispersal habits.

    K Michimoto, Y Takami, H Tanaka, A Ushimaru

    The 59th Annual Meeting of Ecological Society of Japan & The 5th EAFES international Congress, 18 March 2012, 2012年03月, 英語, Otsu, Ryokoku University., 国際会議

    ポスター発表

  • Decrease in plant diversity due to changes in management measures and land abandonment in meadows.

    Y Nagata, A Ushimaru

    The 59th Annual Meeting of Ecological Society of Japan & The 5th EAFES international Congress, 18 March 2012, 2012年03月, 英語, Otsu, Ryokoku University., 国際会議

    ポスター発表

  • 絶滅危惧種ハリママムシグサの保全遺伝学

    深田 ちひろ, 兼子 伸吾, 横川 昌史, 井鷺 裕司, 小林 禧樹, 丑丸 敦史

    第59回日本生態学会大会, 2012年, 日本語, 国内会議

    ポスター発表

  • 里草地草本の宝庫“棚田”の魅力 〜宝塚市におけるワレモコウの生育分布から〜

    出口 詩乃, 丑丸 敦史, 三橋 弘宗, 大澤 剛士

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

  • 里草地における多様性ホットスポットー稀少植物はどこにいるのか?ー

    丑丸 敦史, 植松 裕太, 古賀 達郎, 大澤 剛士, 出口 詩乃, 三橋 弘宗

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

  • 草原性植物はため池が支えている? 〜Vincetoxicum属2種の生育分布から〜

    植松 裕太, 丑丸 敦史, 三橋 弘宗, 大澤 剛士

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

  • 深泥池における訪花昆虫群集の変遷

    鈴木 健司, 丑丸 敦史, 竹門 康弘

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

  • ネジバナはなぜ捩れているか−花序構造と他家受粉促進戦略−

    岩田 達則, 長崎 摂, 石井 博, 丑丸 敦史

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

  • アザミ2種が明かす、里草地管理の重要性

    古賀 達朗, 大沢 剛士, 三橋 弘宗, 丑丸 敦史

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

  • 1+1>2?河川の合流点で種多様性が増加する

    大澤 剛士, 三橋 弘宗, 丑丸 敦史

    第55回 日本生態学会福岡大会, 2008年03月, 日本語, 福岡国際会議場, 国内会議

    ポスター発表

所属学協会

  • 関西自然保護機構

    2009年 - 現在
  • Botanical Society of America

    2005年 - 現在
  • 日本生態学会

    1993年 - 現在

共同研究・競争的資金等の研究課題

  • 保坂 哲朗, 丑丸 敦史

    日本学術振興会, 科学研究費助成事業 基盤研究(C), 基盤研究(C), 広島大学, 2020年04月01日 - 2023年03月31日

  • 丑丸 敦史, 石井 博, 岡本 朋子

    日本学術振興会, 科学研究費助成事業 基盤研究(B), 基盤研究(B), 神戸大学, 2019年04月 - 2023年03月, 研究代表者

    今年度は、再現可能な測定方法による客観性の高い花の複雑性指標の開発を目指して、花の撮影画像を用いた花および花被片の形質測定を行なった。調査は菅平高原ダボススキー場において生育する90種を超える被子植物の花を対象として、正面および側面2方向(直交する3軸方向)から、花とともにスケールを入れた写真をデジタルカメラを用いて撮影した。さらに、撮影に用いた花から送粉者の誘引に関連する花被片を分離し、平面状に展開し、スケールとともにデジタルスキャナで読み、デジタル画像とした。これらの画像を解析ソフトimageJを用いて解析し、各軸方向から見える花の縦横長や面積、全ての花被片の平面面積を算出した。ここで算出した計測値を組み合わせて、複数の花形態に関する指標作成を行なった。また、作成した指標と送粉者相との関係も解析し、指標の有効性を抽出する作業を行なった。その結果、花の立体性指標(正面と側面の比)や花被片の複雑性指標(花として見えている面積と花被片の平面面積の比)は送粉者相(マルハナバチ優占か、ハエ目優占か)を説明できた。一方で、定性的な左右相称性区分(左右相称花/放射相称花)も送粉者相と関係がみられたが、画像データを使った左右相称性指標(正面写真における縦長と横長の比等)は送粉者相との関係が見られなかった。以上のように、今回は花被片の画像データを元にした指標作りを行なったが、一定の成果がみられた。 また三浦半島黒崎の鼻における海岸草原で、年5回、群集の開花種および送粉者の調査を行なった。また同時に虫媒種の花色の調査も行った。データは現在まとめているところである。

  • 宮崎 祐子, 丑丸 敦史, 井上 智美

    日本学術振興会, 科学研究費助成事業 基盤研究(C), 基盤研究(C), 岡山大学, 2019年04月 - 2022年03月, 研究分担者

    本研究では、雄性両全性同株ケツユクサ(Commelina communis f. ciliata: ツユクサの一品種)を材料に、日長、土壌栄養環境、B1(花序の中で最初に咲く花)両性花の結実の有無がB2花(花序の中で2番目に咲く花)の性表現型に影響するメカニズムを総合的に明らかにすることを目的とした。 本年度は「生育環境の日長が異なる地域個体群(エコタイプ)は、B1両性花の結実後であってもB2花に両性花が誘導されるのに必要な暗期の長さが異なるよう適応しているか」「気温上昇によって秋の生育期が延長された場合、短日条件が花の両性化をもたらすことによって種子生産量が増加する可能性があるか 」という問いに答えるため、岩手県盛岡市、長野県上田市、兵庫県神戸市、愛媛県松山市より植物体および種子の採取を行った。採取した植物は岡山大学内施設および国立環境研究所内施設にて育成後に種子を採取し、保存した。保存した種子は低温湿層処理を行ったのちに25度で発芽・育成させ、以下の実験に用いた。 採取した系統を用いて、日長条件を変えて育成し、花成およびB2花に両性花が誘導される際の連続した暗期の長さについて、人工気象器を用いてエコタイプ毎に評価した。実験は現在継続中である。また、ケツユクサにはエコタイプ毎に染色体数が異なることが報告されているため、染色体数の確認を行った。その結果、兵庫県神戸市より採取した個体と長野県上田市より採取した個体は同様に2n=46であった。

  • 丑丸敦史, 平岩将良

    公財)市村清新技術開発財団, 植物研究助成金, 2017年03月 - 2020年04月, 研究代表者

  • 宮崎 祐子, 丑丸 敦史

    日本学術振興会, 科学研究費助成事業 基盤研究(C), 基盤研究(C), 岡山大学, 2016年04月01日 - 2020年03月31日

    植物における個々の花の可塑的な性表現決定機構には個体内資源の関与が示唆されているが、詳細は不明である。本研究では個体内で局所的に発生する資源制限が個花の性決定を説明するかどうかについて検証を行った。 材料には個体内に両性花と雄花を持つツユクサを用い、花序内で最初に咲く両性花(B1)の結実の有無と次に咲く花(B2)の性表現と資源量を調べた。また、雄花と雌花の比較トランスクリプトーム解析を行った。B1結実に伴う花序内の資源の減少は顕著でなく、B2つぼみ内の窒素・リン濃度にはB1の結実の有無による差がなかった。以上から、花序内の資源制限が直接的にB2の性を制御する要因ではないことが示唆された。

  • 田中 健太, 丑丸 敦史, 飯村 康夫

    日本学術振興会, 科学研究費助成事業 基盤研究(C), 基盤研究(C), 筑波大学, 2017年04月 - 2020年03月

    長野県中・東部の、菅平高原、霧ヶ峰高原、白馬等の3地域のスキー場草原で、70年以上続いている古い草原、それより最近できた新しい草原、森林という3タイプの植生の調査地を設け、(1)植生履歴、(2)植物、(3)チョウ、(4)甲虫、(5)黒ボク土の調査を行った。旧草原は植物の種多様性が高いこと、新草原の植物群集は森林と類似性があること、広い旧草原には特有の蝶群集が成立していること、森林性と考えられていた甲虫が草原に数多く分布していること、草原からアカマツ林・シラカバ林・カラマツ林への変化過程のいずれにおいても森林化が開始してから10~40年後には黒ボク土の黒色土が褪色すること、が明らかになった。

  • 丑丸 敦史, 山本 哲史

    日本学術振興会, 科学研究費助成事業 基盤研究(B), 基盤研究(B), 神戸大学, 2016年04月 - 2019年03月, 研究代表者

    本研究課題では、阪神都市圏の都市域から里山域にかけて水田の畦畔を対象に、維管束植物や植食性昆虫、その種間相互作用ネットワークを調べ、都市化の種・機能群多様性やネットワークの構造の影響を解析した。結果、都市水田で調査した分類群の種多様性減少が確認された。この減少は、水田周囲の生育地減少(周囲1kmの農地減少)、景観非接続(最近接二次林との距離増加)や生育地の質的変化(土壌pHや草刈りの増加)等によって引き起こされていた。送粉ネットワークは都市化に伴い、構造が変化し,野生植物群集への送粉サービスが低下していた。都市化は高い生物多様性を涵養する水田生態系へ多大な影響を与えてきたことが示された。

    競争的資金

  • 佐藤 真行, 丑丸 敦史, 片桐 恵子, 高見 泰興, 源 利文, 伊藤 真之

    日本学術振興会, 科学研究費助成事業 挑戦的萌芽研究, 挑戦的萌芽研究, 神戸大学, 2015年04月01日 - 2018年03月31日

    本研究によって、六甲山系の生態系を調査対象フィールドとし、生態学的研究による生態系サービス源の可視化とデータ集約を通じて、生態系サービス評価を行った。特に評価主体の多様性に注目し、自然経験の消失といった都市特有のライフスタイルの変化がもたらす生態系サービス評価への影響が明らかにされた。また、生活の質に注目した心理学的要素を取り入れた生態系サービス評価として定量的な評価を行った。その結果、心理学的測度と厚生測度の相違、環境や生態系の認知プロセス、都市化とライフスタイル変化を考慮することが、生態系サービス評価において重要であることが示された。

    競争的資金

  • 丑丸 敦史

    日本学術振興会, 科学研究費助成事業 基盤研究(C), 基盤研究(C), 神戸大学, 2011年04月28日 - 2015年03月31日, 研究代表者

    近年、世界的に農地周辺の半自然植生において農地の放棄や集約化に伴う生物多様性の減少が報告されている。この研究課題では、日本における水田の耕作放棄および集約化(圃場整備)が水田畦畔上に成立する里草地の植物およびチョウやバッタなどの植食性昆虫の多様性を減少させているメカニズムを明らかにすること目的とした。研究の結果、放棄畦畔や圃場整備畦畔では植物及びチョウ・バッタ類の種数が伝統的畦畔と比べて半減していること、この多様性の減少は草刈り頻度の減少(放棄畦畔)や増加(圃場整備畦畔)に起因していること、多様性を高く保つには年2-3回の草刈りが良いことを明らかにした。

    競争的資金

  • 丑丸 敦史

    日本学術振興会, 科学研究費助成事業 若手研究(B), 若手研究(B), 神戸大学, 2008年 - 2010年, 研究代表者

    これまで、兵庫県宝塚市西谷地区の約1300haの水田の里草地(畦畔、林縁、溜め池堰堤)において絶滅危惧植物種の分布を踏査し、溜め池の堰堤や棚田上部の畦畔が絶滅危惧植物ローカルホットスポットとなっていることを明らかにした。また、絶滅危惧植物のうち3種(スズサイコ、タチカモメヅル、キセルアザミ)と1種の普通種(ノアザミ)の分布を比較したところ、絶滅危惧種の分布は普通種に比べて圃場整備の行われてない伝統的な棚田の上部の畦に集中していることも明らかになった。さらに、これらの絶滅危惧種の分布する棚田上部の畦畔は耕作放棄にともない管理されなくなり草地環境が維持されづらいことが明らかになり、今後積極的に保全していくことの必要性が示された。

    競争的資金

  • 丑丸 敦史

    日本学術振興会, 科学研究費助成事業 若手研究(B), 若手研究(B), 神戸大学, 2005年 - 2007年

    これまでの斜面地における適応的な花方位の研究の発展として、平地環境において花序を持つ植物が個々の花をどのように向ける事が適応的研究を行った。具体的には花を一方方向のみに向けた人工花序とそれぞれの花が60°ずつずれた方向に向れ360°へ向けた人工花序とで、訪花者(クロマルハナバチ)の訪花行動への影響を調べた。また実際に、螺旋状花序(捩れ方に個体へにが存在する)をつけるネジバナを対象に、花序の花の配置がどのように送粉成功へ影響を与えているのか調査を行った。結果、平地環境では一方向花序では、その方向に対するアトラクション効果が高くなるが、多方向へのアトラクションが減少するため、多方向花序にくらべ訪花頻度が減少することが明らかになった。ネジナバを用いた野外調査からは、やはり花を一方向へ向けた花序では、花粉の持ち出しが減少した。また、花間の角度が大きくなりすぎた花序でも花粉の持ち出しが減少している事を発見した。ここから花を様々な角度に向けると花が複数まとまることによるディスプレイサイズ増加の効果を打ち消してしまう事も明らかになった。 以上の研究結果は、花序における個々の花の配置は、アトラクションの影響する範囲やディスプレイサイズ、その結果、繁殖成功に大きく影響をあたえる形質である事が明らかになった。このことは、これまでの花序によるアトラクション効果の研究に新しい視点を加える事のできる結果である。

  • 水田生態系における人為的水管理による植物・送粉者の多様性創出メカニズムの解明とその保全方策

    丑丸敦史

    笹川科学研究助成金, 2005年04月 - 2006年03月, 研究代表者

  • 丑丸 敦史

    日本学術振興会, 科学研究費助成事業 特別研究員奨励費, 特別研究員奨励費, 京都大学, 2000年 - 2001年