Journal of Integrative Agriculture ›› 2019, Vol. 18 ›› Issue (10): 2321-2329.DOI: 10.1016/S2095-3119(18)62145-8

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  • 收稿日期:2018-08-07 出版日期:2019-10-01 发布日期:2019-09-29

More stressful event does not always depress subsequent life performance

CHEN Ying-ying*, ZHANG Wei*, MA Gang, MA Chun-sen   

  1. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
  • Received:2018-08-07 Online:2019-10-01 Published:2019-09-29
  • Contact: Correspondence MA Chun-sen, Tel: +86-10-62811430, E-mail: machunsen@caas.cn
  • About author:CHEN Ying-ying, E-mail: yingyingchen1989@163.com; * These authors contributed equally to this study.
  • Supported by:
    This research was mainly financially supported by the National Natural Science Foundation of China (31501630 and 31471764), the China Postdoctoral Science Foundation (2015M580156), and the earmarked fund of China Agriculture Research System (CARS-29-bc-4). We appreciate the help from Assistant Researcher Zhang Shuai from Institute of Plant Protection, Chinese Academy of Agricultural Sciences, during experiments and manuscript revision.

Abstract:

Climate change has led to a substantial increase in intensity and duration of heat waves worldwide.  Predicting 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.

Key words: climate change ,  Plutella xylostella ,  extreme temperature ,  reproduction ,  carry-over effect