Yamauchi Atsushi, Ito Koichi, Shibasaki Shota
Center for Ecological Research Kyoto University Otsu Japan.
Department of Zoology University of British Columbia Vancouver BC Canada.
Ecol Evol. 2021 Mar 16;11(9):4470-4480. doi: 10.1002/ece3.7342. eCollection 2021 May.
A colonization model provides a useful basis to investigate a role of interspecific competition in species diversity. The model formulates colonization processes of propagules competing for spatially distinct habitats, which is known to result in stable coexistence of multiple species under various trade-off, for example, competition-colonization and fecundity-mortality trade-offs. Based on this model, we propose a new theory to explain patterns of species abundance, assuming a trade-off between competitive ability and fecundity among species. This model makes testable predictions about species positions in the rank abundance diagram under a discrete species competitiveness. The predictions were tested by three data of animal communities, which supported our model, suggesting the importance of interspecific competition in community structure. Our approach provides a new insight into understanding a mechanism of species diversity.
一个定殖模型为研究种间竞争在物种多样性中的作用提供了有用的基础。该模型阐述了繁殖体争夺空间上不同栖息地的定殖过程，已知这会导致多种物种在各种权衡（例如竞争 - 定殖权衡和繁殖力 - 死亡率权衡）下稳定共存。基于此模型，我们提出了一种新理论来解释物种丰度模式，假设物种间在竞争能力和繁殖力之间存在权衡。该模型对离散物种竞争力下等级丰度图中的物种位置做出了可检验的预测。这些预测通过三个动物群落数据进行了检验，这些数据支持了我们的模型，表明种间竞争在群落结构中的重要性。我们的方法为理解物种多样性机制提供了新的见解。
