Biodiversity inhibits species' evolutionary responses to changing environments

被引:151
作者
de Mazancourt, C. [1 ]
Johnson, E. [2 ,3 ]
Barraclough, T. G. [2 ,3 ,4 ]
机构
[1] McGill Univ, Redpath Museum, Montreal, PQ H3A 2K6, Canada
[2] Univ London Imperial Coll Sci Technol & Med, NERC, Ctr Populat Biol, Ascot SL5 7PY, Berks, England
[3] Univ London Imperial Coll Sci Technol & Med, Div Biol, Ascot SL5 7PY, Berks, England
[4] Royal Bot Gardens, Jodrell Lab, Richmond TW9 3DS, Surrey, England
基金
英国自然环境研究理事会;
关键词
adaptation; climate; environmental change; evolution; global; model; niche conservatism; species diversity;
D O I
10.1111/j.1461-0248.2008.01152.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Despite growing interplay between ecological and evolutionary studies, the question of how biodiversity influences evolutionary dynamics within species remains understudied. Here, using a classical model of phenotypic evolution in species occupying a patchy environment, but introducing global change affecting patch conditions, we show that biodiversity can inhibit species' evolution during global change. The presence of several species increases the chance that one or more species are pre-adapted to new conditions, which restricts the ecological opportunity for evolutionary responses in all the species. Consequently, environmental change tends to select for changes in species abundances rather than for changing phenotypes within each species. The buffering effects of species diversity that we describe might be one important but neglected explanation for widely observed niche conservatism in natural systems. Furthermore, the results show that attempts to understand biotic responses to environmental change need to consider both ecological and evolutionary processes in a realistically diverse setting.
引用
收藏
页码:380 / 388
页数:9
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