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タイトル: | Interaction capacity as a potential driver of community diversity |
著者: | Ushio, Masayuki |
著者名の別形: | 潮, 雅之 |
キーワード: | empirical dynamic modelling environmental DNA interaction network community diversity quantitative metabarcoding environmental science ecology theoretical biology |
発行日: | 23-Feb-2022 |
出版者: | The Royal Society |
誌名: | Proceedings of the Royal Society B: Biological Sciences |
巻: | 289 |
号: | 1969 |
論文番号: | 20212690 |
抄録: | How patterns in community diversity emerge is a long-standing question in ecology. Studies suggested that community diversity and interspecific interactions are interdependent. However, evidence from high-diversity ecological communities is lacking because of practical challenges in characterizing speciose communities and their interactions. Here, I analysed time-varying interaction networks that were reconstructed using 1197 species, DNA-based ecological time series taken from experimental rice plots and empirical dynamic modelling, and introduced ‘interaction capacity', namely, the sum of interaction strength that a single species gives and receives, as a potential driver of community diversity. As community diversity increases, the number of interactions increases exponentially but the mean interaction capacity of a community becomes saturated, weakening interspecific interactions. These patterns are modelled with simple mathematical equations, based on which I propose the ‘interaction capacity hypothesis': that interaction capacity and network connectance can be two fundamental properties that influence community diversity. Furthermore, I show that total DNA abundance and temperature influence interaction capacity and connectance nonlinearly, explaining a large proportion of diversity patterns observed in various systems. The interaction capacity hypothesis enables mechanistic explanations of community diversity. Therefore, analysing ecological community data from the viewpoint of interaction capacity would provide new insight into community diversity. |
記述: | 生物多様性の決定機構に新仮説 --「他種との相互作用をいくつまで持てるか」が鍵?--. 京都大学プレスリリース. 2022-02-24. Species thrive through social connections: New hypothesis highlights relationship among biodiversity, interaction strength, and connectance. 京都大学プレスリリース. 2022-05-27. |
著作権等: | © 2022 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited. |
URI: | http://hdl.handle.net/2433/268187 |
DOI(出版社版): | 10.1098/rspb.2021.2690 |
PubMed ID: | 35193401 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2022-02-24 https://www.kyoto-u.ac.jp/en/research-news/2022-05-27-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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