DOI: 10.1111/ele.12941
Scopus记录号: 2-s2.0-85045732252
论文题名: The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity–diversity relationship
作者: Storch D. ; Bohdalková E. ; Okie J.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2018
卷: 21, 期: 6 起始页码: 920
结束页码: 937
语种: 英语
英文关键词: Abundance
; biodiversity patterns
; climate
; diversity equilibria
; environmental productivity
; extinction
; latitudinal diversity gradient
; speciation
; species–energy relationship
Scopus关键词: abundance
; biodiversity
; climate effect
; extinction
; hypothesis testing
; latitudinal gradient
; spatial variation
; speciation (biology)
; species richness
英文摘要: Species richness increases with energy availability, yet there is little consensus as to the exact processes driving this species–energy relationship. The most straightforward explanation is the more-individuals hypothesis (MIH). It states that higher energy availability promotes a higher total number of individuals in a community, which consequently increases species richness by allowing for a greater number of species with viable populations. Empirical support for the MIH is mixed, partially due to the lack of proper formalisation of the MIH and consequent confusion as to its exact predictions. Here, we review the evidence of the MIH and evaluate the reliability of various predictions that have been tested. There is only limited evidence that spatial variation in species richness is driven by variation in the total number of individuals. There are also problems with measures of energy availability, with scale-dependence, and with the direction of causality, as the total number of individuals may sometimes itself be driven by the number of species. However, even in such a case the total number of individuals may be involved in diversity regulation. We propose a formal theory that encompasses these processes, clarifying how the different factors affecting diversity dynamics can be disentangled. © 2018 John Wiley & Sons Ltd/CNRS Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107441
Appears in Collections: 气候减缓与适应
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作者单位: Center for Theoretical Study, Charles University and the Academy of Sciences of the Czech Republic, Praha, Czech Republic; Department of Ecology, Faculty of Science, Charles University, Praha, Czech Republic; School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States; School of Life Sciences, Arizona State University, Tempe, AZ, United States; School for the Future of Innovation in Society, Arizona State University, Tempe, AZ, United States
Recommended Citation:
Storch D.,Bohdalková E.,Okie J.. The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity–diversity relationship[J]. Ecology Letters,2018-01-01,21(6)