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首页> 外文期刊>Trends in Ecology & Evolution >Regional replication of landscape genetics analyses of the Mississippi slimy salamander, Plethodon mississippi
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Regional replication of landscape genetics analyses of the Mississippi slimy salamander, Plethodon mississippi

机译：Mississippi Slimy Salamander景观遗产分析的区域复制，Plethodon Mississippi

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Context Landscape genetics can identify habitat features that facilitate or resist gene flow, providing a framework for anticipating the impacts of land use changes on dispersal of individuals. To inform management, a better understanding of how inferences derived from one study region are applicable to other regions is needed. Objectives We investigated the manner in which five landscape variables correlated with gene flow among Plethodon mississippi populations in two study regions. We compared order of importance, direction (facilitation vs. resistance of gene flow) and scale of effect, and functional relationships of variables within each study area. Methods In forests in Mississippi and Alabama, USA, we tested individual-based genetic distances derived from microsatellite genotypes against effective distances caused by agriculture, hardwoods, pine, manmade structures, and wetlands that were optimized for both scale and transformation using maximum likelihood population effects modeling. Results Of the landscape variables, agriculture and wetlands ranked at the top of both study areas' models. In both forest regions, agriculture was consistently associated with resistance, whereas pine was inferred to facilitate gene flow. However, we found region-specific differences in effects of wetlands, hardwoods, and manmade structures. Configuration of the latter landscape variables differed between forest regions, which may explain the contrasting outcomes. Conclusions Our results underscore the value of metareplication in revealing which components of landscape genetics models may be consistent across different portions of a species' range, and those that have context-dependent impacts on gene flow. We also highlight the need to consider habitat configuration when interpreting the results of landscape genetics analyses.
机译：背景景观遗传学可以识别促进或抵抗基因流动的栖息地特征，提供了一种预期土地利用变化对个体分散的影响的框架。为了告知管理，更好地了解需要从一个学习区域获得的推论适用于其他地区。目的我们调查了两种研究区域中Plethodon密西西比人口中与基因流相关的五个景观变量的方式。我们比较了重要性的顺序，方向（促进基因流动抗性）和效果规模，以及每个研究区域内变量的功能关系。美国森林中的方法在Mississpipi和Alabama，美国测试了衍生自微卫星基因型的个体遗传距离，以防止由农业，硬木，松树，人造结构和使用最大可能性人口效应进行规模和转化优化的湿地的有效距离造型。景观变量的结果，农业和湿地排名在研究领域的型号的顶部。在森林地区，农业始终如一地与抵抗力相关，而松树被推断为促进基因流动。然而，我们发现湿地，硬木和人工结构的影响地区的特定差异。森林地区之间的后一个景观变量的配置不同，可以解释对比的结果。结论我们的结果强调了Metureplication的价值，揭示了景观遗传学模型的哪些组分可能呈跨物种范围的不同部分的一致性，以及对基因流的不同影响。在解释景观遗传学分析结果时，我们还强调了需要考虑栖息地配置的必要性。

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