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A neutral theory with environmental stochasticity explains static and dynamic properties of ecological communities
Author(s) -
Kalyuzhny Michael,
Kadmon Ronen,
Shnerb Nadav M.
Publication year - 2015
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/ele.12439
Subject(s) - ecology , neutral theory of molecular evolution , interspecific competition , ecological niche , niche , abundance (ecology) , theoretical ecology , population , simple (philosophy) , relative abundance distribution , ecological systems theory , relative species abundance , biology , habitat , philosophy , demography , epistemology , sociology
Understanding the forces shaping ecological communities is crucial to basic science and conservation. Neutral theory has made considerable progress in explaining static properties of communities, like species abundance distributions (SADs), with a simple and generic model, but was criticised for making unrealistic predictions of fundamental dynamic patterns and for being sensitive to interspecific differences in fitness. Here, we show that a generalised neutral theory incorporating environmental stochasticity may resolve these limitations. We apply the theory to real data (the tropical forest of Barro Colorado Island) and demonstrate that it much better explains the properties of short‐term population fluctuations and the decay of compositional similarity with time, while retaining the ability to explain SADs. Furthermore, the predictions are considerably more robust to interspecific fitness differences. Our results suggest that this integration of niches and stochasticity may serve as a minimalistic framework explaining fundamental static and dynamic characteristics of ecological communities.