DOI: 10.1111/ele.12546
Scopus记录号: 2-s2.0-84953354167
论文题名: Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits
作者: Koussoroplis A.-M. ; Wacker A.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2016
卷: 19, 期: 2 起始页码: 143
结束页码: 152
语种: 英语
英文关键词: Daphnia
; Biotic interactions
; Co-limitation
; Environmental fluctuations
; Heterogeneity
; Variability
; Vertical migration
; Zooplankton
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107810
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Biochemistry and Biology, Potsdam University, Potsdam, Germany
Recommended Citation:
Koussoroplis A.-M.,Wacker A.. Covariance modulates the effect of joint temperature and food variance on ectotherm life-history traits[J]. Ecology Letters,2016-01-01,19(2)