Differences in the temporal dynamics of phenotypic selection among fitness components in the wild
Differences in the temporal dynamics of phenotypic selection among fitness components in the wild
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DOI：
10.1098/rspb.2010.1973
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发表时间：
2011-05-22
影响因子：
4.7
通讯作者：
Carlson, Stephanie M.
中科院分区：
文献类型：
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作者：
Siepielski, Adam M.;DiBattista, Joseph D.;Carlson, Stephanie M.
选择的平衡通过不同的健身组件（如繁殖力，交配成功，生存）决定了适应性进化的潜在节奏和轨迹。然而，在何种程度上的表型选择的时间动态可能会有所不同健身组件是知之甚少。在这里，我们编制了一个数据库的3978线性选择系数从时间上重复的研究选择在野生种群来解决这个问题。通过研究，我们发现，通过交配成功和繁殖力的多年选择比通过生存的选择更强，但方向上的差异较小。我们还报告说，选择通过交配成功的变化，在长期的平均强度比选择通过生存或繁殖力。方向的一致性和更强的长期平均强度的选择，通过交配成功和繁殖力表明，通过这些健身组件的选择应该会导致更持久的方向进化相对于选择通过生存。对于同时使用几个不同的适应度分量评估性状选择的时间动态的研究子集来说，类似的模式也很明显，但此类研究很少存在。综上所述，这些结果揭示了选择通过不同的适应性成分起作用的时间动态的关键差异，但它们也揭示了我们对选择如何驱动适应性进化的理解的重要局限性。
The balance of selection acting through different fitness components (e.g. fecundity, mating success, survival) determines the potential tempo and trajectory of adaptive evolution. Yet the extent to which the temporal dynamics of phenotypic selection may vary among fitness components is poorly understood. Here, we compiled a database of 3978 linear selection coefficients from temporally replicated studies of selection in wild populations to address this question. Across studies, we find that multi-year selection through mating success and fecundity is stronger than selection through survival, but varies less in direction. We also report that selection through mating success varies more in long-term average strength than selection through either survival or fecundity. The consistency in direction and stronger long-term average strength of selection through mating success and fecundity suggests that selection through these fitness components should cause more persistent directional evolution relative to selection through survival. Similar patterns were apparent for the subset of studies that evaluated the temporal dynamics of selection on traits simultaneously using several different fitness components, but few such studies exist. Taken together, these results reveal key differences in the temporal dynamics of selection acting through different fitness components, but they also reveal important limitations in our understanding of how selection drives adaptive evolution.