DOI: 10.1111/ele.12547
Scopus记录号: 2-s2.0-84953370963
论文题名: Stochastic density effects on adult fish survival and implications for population fluctuations
作者: Okamoto D.K. ; Schmitt R.J. ; Holbrook S.J.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2016
卷: 19, 期: 2 起始页码: 153
结束页码: 162
语种: 英语
英文关键词: Density dependence
; Fish
; Marine
; Mortality
; Population dynamics
; Recruitment
; Resource limitation
; Survival
Scopus关键词: abundance
; adult
; density dependence
; fish
; food supply
; marine ecosystem
; mortality
; population density
; recruitment (population dynamics)
; resource depletion
; stochasticity
; survival
英文摘要: The degree to which population fluctuations arise from variable adult survival relative to variable recruitment has been debated widely for marine organisms. Disentangling these effects remains challenging because data generally are not sufficient to evaluate if and how adult survival rates are regulated by stochasticity and/or population density. Using unique time series for a largely unexploited reef fish, we found both population density and stochastic food supply impacted adult survival. The estimated effect of variable survival on adult abundance (both mean and variability) rivalled that of variable recruitment. Moreover, we show density-dependent adult survival can dampen impacts of stochastic recruitment. Thus, food variability may alter population fluctuations by simultaneously regulating recruitment and compensatory adult survival. These results provide an additional mechanism for why intensified density-independent mortality (via harvest or other means) amplifies population fluctuations and emphasises need for research evaluating the causes and consequences of variability in adult survival. Copyright © 2016 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/107804
Appears in Collections: 气候减缓与适应
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作者单位: Ecology, Evolution and Marine Biology, University of California, Santa Barbara EEMB, Santa Barbara, CA, United States; Marine Science Institute, University of California, Santa Barbara EEMB, Santa Barbara, CA, United States; School of Resource and Environmental Management, Simon Fraser University, Burnaby, BC, Canada
Recommended Citation:
Okamoto D.K.,Schmitt R.J.,Holbrook S.J.. Stochastic density effects on adult fish survival and implications for population fluctuations[J]. Ecology Letters,2016-01-01,19(2)