Effects of size selection versus density dependence on life histories: A first experimental probe,Ecology Letters

当前位置： X-MOL 学术 › Ecol. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Effects of size selection versus density dependence on life histories: A first experimental probe
Ecology Letters ( IF 7.6 ) Pub Date : 2021-05-07 , DOI: 10.1111/ele.13767
Kelsey Lyberger ₁ , Thomas W. Schoener ₁ , Sebastian J. Schreiber ₁

Affiliation

When prey experience size-based harvesting by predators, they are not only subject to selection due to larger individuals being preferentially harvested but also selection due to reductions in population density. Density-dependent selection represents one of the most basic interactions between ecology and evolution. Yet, the reduction in density associated with exploitation has not been tested as a possible driving force of observed evolutionary changes in populations harvested size-dependently. Using an artificial selection experiment with a mixture of Daphnia clones, we partition the evolutionary effects of size-based harvesting into the effects of removing large individuals and the effects of lowering the population density. We show that both size selection and density-dependent selection are significant drivers of life-history evolution. Importantly, these drivers affected different life-history traits with size-selective harvesting selecting for slower juvenile growth rates and a larger size at maturity, and low-density selecting for reduced reproductive output.

中文翻译：

尺寸选择与密度依赖性对生活史的影响：第一个实验探针

当猎物经历捕食者基于大小的收获时，它们不仅会因为较大的个体被优先收获而受到选择，而且还会由于种群密度的降低而受到选择。密度依赖选择代表了生态与进化之间最基本的相互作用之一。然而，与开发相关的密度降低尚未被测试为观察到的根据大小收获的种群进化变化的可能驱动力。使用水蚤混合物的人工选择实验克隆，我们将基于大小的收获的进化影响划分为移除大个体的影响和降低种群密度的影响。我们表明，大小选择和密度相关选择都是生命史进化的重要驱动因素。重要的是，这些驱动因素影响了不同的生活史特征，尺寸选择性收获选择了较慢的幼鱼生长速度和更大的成熟尺寸，以及低密度选择以减少繁殖产量。

更新日期：2021-06-13

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11