Observed Ecological Communities Are Formed by Species Combinations That Are among the Most Likely to Persist under Changing Environments
Observed Ecological Communities Are Formed by Species Combinations That Are among the Most Likely to Persist under Changing Environments
复制标题
观察到的生态群落是由最有可能在不断变化的环境下持续存在的物种组合形成的
DOI:
10.1086/711663
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Saavedra, Serguei
中科院分区:
文献类型:
--
作者:
Medeiros, Lucas P.;Boege, Karina;del-Val, Ek;Zaldívar-Riverón, Alejandro;Saavedra, Serguei
Despite the rich biodiversity found in nature, it is unclear to what extent some combinations of interacting species, while conceivable in a given place and time, may never be realized. Yet solving this problem is important for understanding the role of randomness and predictability in the assembly of ecological communities. Here we show that the specific combinations of interacting species that emerge from the ecological dynamics within regional species pools are not all equally likely to be seen; rather, they are among the most likely to persist under changing environments. First, we use niche-based competition matrices and Lotka-Volterra models to demonstrate that realized combinations of interacting species are more likely to persist under random parameter perturbations than the majority of potential combinations with the same number of species that could have been formed from the regional pool. We then corroborate our theoretical results using a 10-year observational study, recording 88 plant-herbivore communities across three different forest successional stages. By inferring and validating plant-mediated communities of competing herbivore species, we find that observed combinations of herbivores have an expected probability of species persistence higher than half of all potential combinations. Our findings open up the opportunity to establish a formal probabilistic and predictive understanding of the composition of ecological communities.
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