The effects of asymmetric competition on the life history of Trinidadian guppies.
The effects of asymmetric competition on the life history of Trinidadian guppies.
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DOI：
10.1111/ele.12563
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发表时间：
2016-03
期刊：
影响因子：
8.8
通讯作者：
Coulson T
中科院分区：
文献类型：
--
作者：
Bassar RD;Childs DZ;Rees M;Tuljapurkar S;Reznick DN;Coulson T
不对称相互作用对种群动态的影响已经得到了广泛的研究，但很少有工作旨在了解生活史参数，如世代时间，预期寿命和一生中的繁殖成功的方差是如何受到不同类型的竞争的影响。我们开发了一个新的框架，将性状介导的密度依赖纳入大小结构模型，并使用特立尼达孔雀鱼来显示不同类型的竞争相互作用如何影响生活史参数。我们的研究结果表明，竞争相互作用的对称程度可以对生命史的速度产生显着的影响。对于某些重要率，将竞争优势从小个体转移到大个体导致世代时间加倍。竞争对称性对人口过程的时间尺度以及进化的影响如此之大，突出了生态和进化过程的交织性质以及密度依赖在理解生态进化动力学中的重要性。
The effects of asymmetric interactions on population dynamics has been widely investigated, but there has been little work aimed at understanding how life history parameters like generation time, life expectancy and the variance in lifetime reproductive success are impacted by different types of competition. We develop a new framework for incorporating trait‐mediated density‐dependence into size‐structured models and use Trinidadian guppies to show how different types of competitive interactions impact life history parameters. Our results show the degree of symmetry in competitive interactions can have dramatic effects on the speed of the life history. For some vital rates, shifting the competitive superiority from small to large individuals resulted in a doubling of the generation time. Such large influences of competitive symmetry on the timescale of demographic processes, and hence evolution, highlights the interwoven nature of ecological and evolutionary processes and the importance of density‐dependence in understanding eco‐evolutionary dynamics.