Environmental factors influence both abundance and genetic diversity in a widespread bird species.
Environmental factors influence both abundance and genetic diversity in a widespread bird species.
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DOI：
10.1002/ece3.856
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发表时间：
2013-11
影响因子：
2.6
通讯作者：
Griesser, Michael
中科院分区：
文献类型：
--
作者：
Liu, Yang;Webber, Simone;Bowgen, Katharine;Schmaltz, Lucie;Bradley, Katharine;Halvarsson, Peter;Abdelgadir, Mohanad;Griesser, Michael
遗传多样性是与种群规模相关的关键进化变量之一，对种群生存力和物种的持久性至关重要。遗传多样性也可以在种群内产生重要的生态后果，反过来，生态因素可以驱动遗传多样性的模式。然而，一个种群的遗传多样性之间的关系，以及它如何与生态过程相互作用，到目前为止，只有少数研究进行了调查。在这里，我们调查生态因素，当地人口规模和等位基因多样性之间的联系，使用一个常见的鸟类，家雀（麻雀）的实地研究。我们在法国南部一个以分散农场和小规模农业为主的狭窄的小山谷中研究了繁殖季节以外的麻雀。在36个地点进行的人口调查显示，麻雀在食物供应量高的地点数量更多。然后，我们捕获和基因型891家雀在10个微卫星位点从这些位置的一个子集（N = 12）。种群遗传分析显示，遗传结构薄弱，每个地方代表了一个独特的子结构内的研究领域。我们发现，食物的可获得性是影响不同地点之间遗传结构的主要因素。这些结果表明，生态因素可以有很强的影响，人口规模本身和种群内的遗传变异，即使在一个小规模。在更一般的水平上，我们的数据表明，一个斑块状的环境和低扩散率可以导致精细尺度的遗传多样性模式。鉴于遗传多样性对种群生存能力的重要性，结合生态和遗传数据有助于确定限制种群规模的因素，并确定种群的保护潜力。
Genetic diversity is one of the key evolutionary variables that correlate with population size, being of critical importance for population viability and the persistence of species. Genetic diversity can also have important ecological consequences within populations, and in turn, ecological factors may drive patterns of genetic diversity. However, the relationship between the genetic diversity of a population and how this interacts with ecological processes has so far only been investigated in a few studies. Here, we investigate the link between ecological factors, local population size, and allelic diversity, using a field study of a common bird species, the house sparrow (Passer domesticus). We studied sparrows outside the breeding season in a confined small valley dominated by dispersed farms and small-scale agriculture in southern France. Population surveys at 36 locations revealed that sparrows were more abundant in locations with high food availability. We then captured and genotyped 891 house sparrows at 10 microsatellite loci from a subset of these locations (N = 12). Population genetic analyses revealed weak genetic structure, where each locality represented a distinct substructure within the study area. We found that food availability was the main factor among others tested to influence the genetic structure between locations. These results suggest that ecological factors can have strong impacts on both population size per se and intrapopulation genetic variation even at a small scale. On a more general level, our data indicate that a patchy environment and low dispersal rate can result in fine-scale patterns of genetic diversity. Given the importance of genetic diversity for population viability, combining ecological and genetic data can help to identify factors limiting population size and determine the conservation potential of populations.
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影响因子：
5.2
作者：
Garant, Dany;Forde, Samantha E.;Hendry, Andrew P.
通讯作者：
Hendry, Andrew P.
影响因子：
4.8
作者：
ARCESE, P;SMITH, JNM
通讯作者：
SMITH, JNM
影响因子：
2.5
作者：
Backwell, PRY;O'Hara, PD;Christy, JH
通讯作者：
Christy, JH
影响因子：
2.8
作者：
Beerens, James M.;Gawlik, Dale E.;Cook, Mark I.
通讯作者：
Cook, Mark I.
影响因子：
3.3
作者：
Gaggiotti, Oscar E.;Bekkevold, Dorte;Ruzzante, Daniel E.
通讯作者：
Ruzzante, Daniel E.