More stressful event does not always depress subsequent life performance

作     者：CHEN Ying-ying ZHANG Wei MA Gang MA Chun-sen 

作者机构：State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2019年第18卷第10期

页      面：2321-2329页

核心收录：

学科分类：09[农学] 

基　　金：financially supported by the National Natural Science Foundation of China (31501630 and 31471764) the China Postdoctoral Science Foundation (2015M580156) the earmarked fund of China Agriculture Research System (CARS-29-bc-4) 

主　　题：climate change Plutella xylostella extreme temperature reproduction carry-over effect 

摘      要：Climate change has led to a substantial increase in intensity and duration of heat waves *** the ecological impacts of hot events should incorporate both immediate and potential carry-over effects in different intensities of heat waves. Previous studies suggested that higher heat dose in early life stage of insect generally decreased immediate survival and depressed adult reproduction through carry-over effects, or unchanged adult performance through recovery effects. However, our previous study showed a different pattern, in which longer heat exposures in larval stage did not always decrease but sometimes increase the subsequent adult maturation success in the diamondback moth. We speculated that it might be another important pattern in the carry-over effects vs. heat dose, and conducted experiments using a global pest, Plutella xylostella. Our present results suggested that heat exposures in early life stage reduced the immediate survival and produced general declines with significant zigzag fluctuating patterns in subsequent body size and reproduction as exposure durations increased. The similar patterns were also validated in other insect taxa and other stresses by reanalyzing the experiment data from literatures. The finding highlights the importance for differentiating the biological effects and consequences of changes in heat dose at fine scales;daily exposure hours of a hot day should be considered to predict population dynamic under climate change.