Reproductive asynchrony increases with environmental disturbance

Eric Post, Simon A. Levin, Yoh Iwasa, Nils C. Stenseth

研究成果: ジャーナルへの寄稿学術誌査読

36 被引用数 (Scopus)

抄録

While it is widely recognized that the manner in which organisms adjust their timing of reproduction reflects evolutionary strategies aimed at minimizing offspring mortality or maximizing reproductive output, the conditions under which the evolutionarily stable strategy involves synchronous or asynchronous reproduction is a matter of considerable discord. A recent theoretical model predicts that whether a population displays reproductive synchrony or asynchrony will depend on the relative scales of intrinsic regulation and environmental disturbance experienced by reproducing individuals. This model predicts that, under conditions of negligible competition and large-scale environmental perturbation, evolution of a single mixed strategy will result in asynchronous reproduction. We tested this prediction using empirical data on large-scale climatic fluctuation and the annual timing of reproduction by three species of flowering plants covering 1300-population-years and four degrees of latitude in Norway. In agreement with model predictions, within populations of all three species reproductive asynchrony increased with the magnitude of large-scale climatic perturbation, but bore no relation to the strength of local density dependence. These results suggest that mixed evolutionarily stable strategies can arise from the interplay of combinations of agents of selection and the scale at which they operate; hence it is fruitless to associate synchronous versus asynchronous timing with particular single factors like climate, competition, or predation.

本文言語英語
ページ(範囲)830-834
ページ数5
ジャーナルEvolution; international journal of organic evolution
55
4
出版ステータス出版済み - 4月 2001

!!!All Science Journal Classification (ASJC) codes

  • 農業および生物科学(全般)
  • 生態、進化、行動および分類学
  • 農業および生物科学(その他)
  • 遺伝学(臨床)
  • 生態学
  • 遺伝学

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