气候变化领域集成服务门户(CCPortal): The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity

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DOI	10.1111/ele.12941
	The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity–diversity relationship
	Storch D.; Bohdalková E.; Okie J.
发表日期	2018
ISSN	1461023X
卷号	21 期号:6
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
英文关键词	Abundance; biodiversity patterns; climate; diversity equilibria; environmental productivity; extinction; latitudinal diversity gradient; speciation; species–energy relationship
语种	英语
scopus关键词	abundance; biodiversity; climate effect; extinction; hypothesis testing; latitudinal gradient; spatial variation; speciation (biology); species richness; biodiversity; population dynamics; reproducibility; Biodiversity; Population Dynamics; Reproducibility of Results
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121307
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
推荐引用方式 GB/T 7714	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],2018,21(6).
APA	Storch D.,Bohdalková E.,&Okie J..(2018).The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity–diversity relationship.Ecology Letters,21(6).
MLA	Storch D.,et al."The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity–diversity relationship".Ecology Letters 21.6(2018).