Simple life-history traits explain key effective population size ratios across diverse taxa
Simple life-history traits explain key effective population size ratios across diverse taxa
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简单的生活史特征解释了不同类群的关键有效种群规模比率
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
D. Tallmon
中科院分区：
文献类型：
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作者：
R. Waples;G. Luikart;James R. Faulkner;D. Tallmon
有效群体大小（Ne）控制着随机遗传漂变的速率以及选择和迁移的有效性，但在自然界中很难估计。特别是，对于世代重叠的物种，它是更容易估计的有效育种数在一个生殖周期（Nb）比Ne每一代。我们经验性地评估了生活史和Ne，Nb和成人人口普查规模（N）的比率之间的关系，使用最近开发的模型（agene）和63 iteroparous动物和植物的生命率。Nb/Ne在不同物种之间变化惊人的六倍，与预期相反，Nb在超过一半的物种中大于Ne。高达三分之二的Nb/Ne的方差和高达一半的Ne/N的方差解释了两个生活史性状（成熟年龄和成年寿命），长期以来一直感兴趣的生态学家和进化生物学家。这些结果提供了新的见解，并展示了密切的一般联系，人口和进化过程中不同的类群。我们的研究结果还首次使我们有可能在基于每一代Ne的丰富进化理论背景下解释快速积累的Nb估计值。
Effective population size (Ne) controls both the rate of random genetic drift and the effectiveness of selection and migration, but it is difficult to estimate in nature. In particular, for species with overlapping generations, it is easier to estimate the effective number of breeders in one reproductive cycle (Nb) than Ne per generation. We empirically evaluated the relationship between life history and ratios of Ne, Nb and adult census size (N) using a recently developed model (agene) and published vital rates for 63 iteroparous animals and plants. Nb/Ne varied a surprising sixfold across species and, contrary to expectations, Nb was larger than Ne in over half the species. Up to two-thirds of the variance in Nb/Ne and up to half the variance in Ne/N was explained by just two life-history traits (age at maturity and adult lifespan) that have long interested both ecologists and evolutionary biologists. These results provide novel insights into, and demonstrate a close general linkage between, demographic and evolutionary processes across diverse taxa. For the first time, our results also make it possible to interpret rapidly accumulating estimates of Nb in the context of the rich body of evolutionary theory based on Ne per generation.