Evolution of increased phenotypic diversity enhances population performance by reducing sexual harassment in damselflies
Evolution of increased phenotypic diversity enhances population performance by reducing sexual harassment in damselflies
复制标题
DOI：
10.1038/ncomms5468
复制
发表时间：
2014-07-01
影响因子：
16.6
通讯作者：
Kawata, Masakado
中科院分区：
文献类型：
--
作者：
Takahashi, Yuma;Kagawa, Kotaro;Kawata, Masakado
性状和表型/遗传多样性的进化变化对生态动态的影响已受到理论界的广泛关注，但其机制和生态后果通常是未知的。女性有限的颜色多态性豆娘是一种反适应男性交配骚扰，因此，预计将改变人口动态，通过放松性冲突。在这里，我们展示了雌性形态多样性的进化对豆娘种群性能（例如，种群生产力和可持续性）的副作用。我们的理论模型结合性互动的关键特征预测，增加的表型多样性的演变将减少整体健身成本的女性从性冲突，这反过来又会增加生产力，密度和稳定性的人口。现场数据和围隔实验支持这些模型的预测。我们的研究表明，增加表型多样性可以提高人口的表现，可以潜在地降低灭绝率，从而影响宏观进化过程。
The effect of evolutionary changes in traits and phenotypic/genetic diversity on ecological dynamics has received much theoretical attention; however, the mechanisms and ecological consequences are usually unknown. Female-limited colour polymorphism in damselflies is a counter-adaptation to male mating harassment, and thus, is expected to alter population dynamics through relaxing sexual conflict. Here we show the side effect of the evolution of female morph diversity on population performance (for example, population productivity and sustainability) in damselflies. Our theoretical model incorporating key features of the sexual interaction predicts that the evolution of increased phenotypic diversity will reduce overall fitness costs to females from sexual conflict, which in turn will increase productivity, density and stability of a population. Field data and mesocosm experiments support these model predictions. Our study suggests that increased phenotypic diversity can enhance population performance that can potentially reduce extinction rates and thereby influence macroevolutionary processes.