气候变化领域集成服务门户(CCPortal): Stochastic density effects on adult fish survival and implications for population fluctuations

CCPortal

DOI	10.1111/ele.12547
	Stochastic density effects on adult fish survival and implications for population fluctuations
	Okamoto D.K.; Schmitt R.J.; Holbrook S.J.
发表日期	2016
ISSN	1461-023X
EISSN	1461-0248
卷号	19 期号:2
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.
英文关键词	Density dependence; Fish; Marine; Mortality; Population dynamics; Recruitment; Resource limitation; Survival
学科领域	abundance; adult; density dependence; fish; food supply; marine ecosystem; mortality; population density; recruitment (population dynamics); resource depletion; stochasticity; survival
语种	英语
scopus关键词	abundance; adult; density dependence; fish; food supply; marine ecosystem; mortality; population density; recruitment (population dynamics); resource depletion; stochasticity; survival
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/118588
作者单位	Ecology, Evolution and Marine Biology, University of California, Santa Barbara EEMB, Santa Barbara, CA 93106-9610, United States; Marine Science Institute, University of California, Santa Barbara EEMB, Santa Barbara, CA 93106-9610, United States; School of Resource and Environmental Management, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
推荐引用方式 GB/T 7714	Okamoto D.K.,Schmitt R.J.,Holbrook S.J.. Stochastic density effects on adult fish survival and implications for population fluctuations[J],2016,19(2).
APA	Okamoto D.K.,Schmitt R.J.,&Holbrook S.J..(2016).Stochastic density effects on adult fish survival and implications for population fluctuations.Ecology Letters,19(2).
MLA	Okamoto D.K.,et al."Stochastic density effects on adult fish survival and implications for population fluctuations".Ecology Letters 19.2(2016).