气候变化领域集成服务门户(CCPortal): Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits

CCPortal

DOI	10.1111/ele.12546
	Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits
	Koussoroplis A.-M.; Wacker A.
发表日期	2016
ISSN	1461-023X
EISSN	1461-0248
卷号	19 期号:2
英文摘要	Understanding animal performance in heterogeneous or variable environments is a central question in ecology. We combine modelling and experiments to test how temperature and food availability variance jointly affect life-history traits of ectotherms. The model predicts that as mean temperatures move away from the ectotherm's thermal optimum, the effect size of joint thermal and food variance should become increasingly sensitive to their covariance. Below the thermal optimum, performance should be positively correlated with food-temperature covariance and the opposite is predicted above it. At lower temperatures, covariance should determine whether food and temperature variance increases or decreases performance compared to constant conditions. Somewhat stronger than predicted, the covariance effect below the thermal optimum was confirmed experimentally on an aquatic ectotherm (Daphnia magna) exposed to diurnal food and temperature variance with different amounts of covariance. Our findings have important implications for understanding ectotherm responses to climate-driven alterations of thermal mean and variance. Copyright © 2016 John Wiley & Sons Ltd/CNRS.
英文关键词	Daphnia; Biotic interactions; Co-limitation; Environmental fluctuations; Heterogeneity; Variability; Vertical migration; Zooplankton
学科领域	biotic factor; covariance analysis; crustacean; ectothermy; environmental change; food availability; heterogeneity; life history trait; low temperature; temperature profile; vertical migration; zooplankton; Animalia; Daphnia; Daphnia magna
语种	英语
scopus关键词	biotic factor; covariance analysis; crustacean; ectothermy; environmental change; food availability; heterogeneity; life history trait; low temperature; temperature profile; vertical migration; zooplankton; Animalia; Daphnia; Daphnia magna
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/118594
作者单位	Institute for Biochemistry and Biology, Potsdam University, Potsdam, Germany
推荐引用方式 GB/T 7714	Koussoroplis A.-M.,Wacker A.. Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits[J],2016,19(2).
APA	Koussoroplis A.-M.,&Wacker A..(2016).Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits.Ecology Letters,19(2).
MLA	Koussoroplis A.-M.,et al."Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits".Ecology Letters 19.2(2016).