Evolution of competitive ability in Drosophila by density-dependent natural selection.
Evolution of competitive ability in Drosophila by density-dependent natural selection.
复制标题
果蝇竞争能力通过密度依赖性自然选择的进化。
DOI：
10.1073/pnas.85.12.4383
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发表时间：
1988
影响因子：
11.1
通讯作者：
Mueller,LD
中科院分区：
文献类型：
--
作者：
Mueller,LD
密度依赖自然选择理论预测，保持在极端密度的种群应该进化出对有限资源的不同竞争能力。这些预测已经与实验室种群的果蝇进行了测试。6个独立的群体在两种环境中保持，称为r和K，128代。在r环境中，种群规模小，幼虫和成虫资源丰富。相比之下，K环境中的人口庞大而拥挤，食物和空间等资源短缺。对每个种群的食物相对竞争能力进行了估计。来自K环境的种群消耗食物的速率比r种群的平均速率高58%。这些种群竞争能力的差异是由于自然选择，与进化生态学理论的预测是一致的。
The theory of density-dependent natural selection predicts that populations kept at extreme densities should evolve different competitive abilities for limited resources. These predictions have been tested with laboratory populations of Drosophila melanogaster. Six independent populations were maintained in two environments, called r and K, for 128 generations. In the r environment, population sizes were small and resources for larvae and adults were abundant. In contrast the populations in the K environment were large and crowded, and resources, such as food and space, were in short supply. The relative competitive ability for food has been estimated for each population. Populations from the K environment consume food at a rate that is 58% greater than the average rate for the r population. The differentiation of competitive abilities in these populations is due to natural selection and is consistent with predictions from the theory of evolutionary ecology.