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タイトル: Sex allocation promotes the stable co-occurrence of competitive species
著者: Kobayashi, Kazuya  kyouindb  KAKEN_id
著者名の別形: 小林, 和也
発行日: 6-Mar-2017
出版者: Springer Nature
誌名: Scientific Reports
巻: 7
論文番号: 43966
抄録: Biodiversity has long been a source of wonder and scientific curiosity. Theoretically, the co-occurrence of competitive species requires niche differentiation, and such differences are well known; however, the neutral theory, which assumes the equivalence of all individuals regardless of the species in a biological community, has successfully recreated observed patterns of biodiversity. In this research, the evolution of sex allocation is demonstrated to be the key to resolving why the neutral theory works well, despite the observed species differences. The sex allocation theory predicts that female-biased allocation evolves in species in declining density and that this allocation improves population growth, which should lead to an increase in density. In contrast, when the density increases, a less biased allocation evolves, which reduces the population growth rate and leads to decreased density. Thus, sex allocation provides a buffer against species differences in population growth. A model incorporating this mechanism demonstrates that hundreds of species can co-occur over 10, 000 generations, even in homogeneous environments, and reproduces the observed patterns of biodiversity. This study reveals the importance of evolutionary processes within species for the sustainability of biodiversity. Integrating the entire biological process, from genes to community, will open a new era of ecology.
記述: 生物多様性を維持する新しい理論の提示 : 密度に応じた資源配分が希少種の存続を許す. 京都大学プレスリリース. 2017-03-09.
著作権等: © The Author(s) 2017. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/218743
DOI(出版社版): 10.1038/srep43966
PubMed ID: 28262844
関連リンク: http://www.kyoto-u.ac.jp/ja/research/research_results/2016/170306_2.html
出現コレクション:学術雑誌掲載論文等

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