期刊
ECOLOGY LETTERS
卷 12, 期 10, 页码 1079-1090出版社
WILEY
DOI: 10.1111/j.1461-0248.2009.01364.x
关键词
Biodiversity; body mass; coexistence; competition; migration; neutrality; niche space; niche-based processes; species similarity
类别
Ecological models suggest that high diversity can be generated by purely niche-based, purely neutral or by a mixture of niche-based and neutral ecological processes. Here, we compare the degree to which four contrasting hypotheses for coexistence, ranging from niche-based to neutral, explain species richness along a body mass niche axis. We derive predictions from these hypotheses and confront them with species body-mass patterns in a highly sampled marine phytoplankton community. We find that these patterns are consistent only with a mechanism that combines niche and neutral processes, such as the emergent neutrality mechanism. In this work, we provide the first empirical evidence that a niche-neutral model can explain niche space occupancy pattern in a natural species-rich community. We suggest this class of model may be a useful hypothesis for the generation and maintenance of species diversity in other size-structured communities.
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