DOI: 10.1111/ele.13430
论文题名: Mean growth rate when rare is not a reliable metric for persistence of species
作者: Pande J. ; Fung T. ; Chisholm R. ; Shnerb N.M.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2020
卷: 23, 期: 2 起始页码: 274
结束页码: 282
语种: 英语
中文关键词: Coexistence
; environmental stochasticity
; invasibility
; lottery model
; mean growth rate
; mean time to extinction
; modern coexistence theory
; persistence
英文关键词: biological model
; population dynamics
; Models, Biological
; Population Dynamics
英文摘要: The coexistence of many species within ecological communities poses a long-standing theoretical puzzle. Modern coexistence theory (MCT) and related techniques explore this phenomenon by examining the chance of a species population growing from rarity in the presence of all other species. The mean growth rate when rare, (Formula presented.), is used in MCT as a metric that measures persistence properties (like invasibility or time to extinction) of a population. Here we critique this reliance on (Formula presented.) and show that it fails to capture the effect of temporal random abundance variations on persistence properties. The problem becomes particularly severe when an increase in the amplitude of stochastic temporal environmental variations leads to an increase in (Formula presented.), since at the same time it enhances random abundance fluctuations and the two effects are inherently intertwined. In this case, the chance of invasion and the mean extinction time of a population may even go down as (Formula presented.) increases. © 2019 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/166692
Appears in Collections: 气候变化与战略
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作者单位: Department of Physics, Bar-Ilan University, Ramat Gan, 52900, Israel; Department of Biological Sciences, National University of Singapore, Singapore, 117543, Singapore
Recommended Citation:
Pande J.,Fung T.,Chisholm R.,et al. Mean growth rate when rare is not a reliable metric for persistence of species[J]. Ecology Letters,2020-01-01,23(2)