气候变化领域集成服务门户(CCPortal): Empirical abundance distributions are more uneven than expected given their statistical baseline

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DOI	10.1111/ele.13820
	Empirical abundance distributions are more uneven than expected given their statistical baseline
	Diaz R.M.; Ye H.; Ernest S.K.M.
发表日期	2021
ISSN	1461023X
起始页码	2025
结束页码	2039
卷号	24 期号:9
英文摘要	Exploring and accounting for the emergent properties of ecosystems as complex systems is a promising horizon in the search for general processes to explain common ecological patterns. For example the ubiquitous hollow-curve form of the species abundance distribution is frequently assumed to reflect ecological processes structuring communities, but can also emerge as a statistical phenomenon from the mathematical definition of an abundance distribution. Although the hollow curve may be a statistical artefact, ecological processes may induce subtle deviations between empirical species abundance distributions and their statistically most probable forms. These deviations may reflect biological processes operating on top of mathematical constraints and provide new avenues for advancing ecological theory. Examining ~22,000 communities, we found that empirical SADs are highly uneven and dominated by rare species compared to their statistical baselines. Efforts to detect deviations may be less informative in small communities—those with few species or individuals—because these communities have poorly resolved statistical baselines. The uneven nature of many empirical SADs demonstrates a path forward for leveraging complexity to understand ecological processes governing the distribution of abundance, while the issues posed by small communities illustrate the limitations of using this approach to study ecological patterns in small samples. © 2021 John Wiley & Sons Ltd.
关键词	combinatorics constraints feasible set macroecology species abundance distributions
语种	英语
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/204375
作者单位	School of Natural Resources and Environment, University of Florida, Gainesville, FL, United States; Health Science Center Libraries, University of Florida, Gainesville, FL, United States; Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL, United States
推荐引用方式 GB/T 7714	Diaz R.M.,Ye H.,Ernest S.K.M.. Empirical abundance distributions are more uneven than expected given their statistical baseline[J],2021,24(9).
APA	Diaz R.M.,Ye H.,&Ernest S.K.M..(2021).Empirical abundance distributions are more uneven than expected given their statistical baseline.Ecology Letters,24(9).
MLA	Diaz R.M.,et al."Empirical abundance distributions are more uneven than expected given their statistical baseline".Ecology Letters 24.9(2021).