The role of landscape and history on the genetic structure of peripheral populations of the Near Eastern fire salamander, Salamandra infraimmaculata, in Northern Israel
The role of landscape and history on the genetic structure of peripheral populations of the Near Eastern fire salamander, Salamandra infraimmaculata, in Northern Israel
复制标题
景观和历史对以色列北部近东火蝾螈（Salamandra infraimmaculata）外围种群遗传结构的作用
作者：
I. Sinai;O. Segev;G. Weil;T. Oron;J. Merilä;A. Templeton;L. Blaustein;Gili Greenbaum;L. Blank
对核心群体与外围群体的遗传学研究得出了许多模式。这种遗传模式的多样性可能反映了地理、基因流动模式、历史影响和生态条件所定义的“外围种群”含义的多样性。物种分布范围内低纬度边缘地区的种群尤其值得关注，因为全球气候变化可能导致它们面临更大的灭绝风险。在这项工作中，我们的目的是了解景观和生态因素对外围种群不同地理类型在遗传多样性水平和当地种群分化模式方面的影响。我们通过分析来自 32 个地点的 15 个微卫星位点的变异性，研究了位于以色列北部蝾螈属最南端边缘的濒危蝾螈 (Salamandra infraimmaculata) 外围种群的三种地理类型。我们的结果表明：（1）遗传多样性随着物种分布范围的地理边缘而减少； (2) 与核心或邻近核心的外围种群相比，地理上不连续的外围地区的遗传多样性较低，并且很可能受到创始人效应的影响； (3)生态边缘条件加强了人口细分。我们发现的模式得出这样的结论：遗传多样性受到地理、历史和生态因素的综合影响。在确定保护区的优先顺序时应考虑这些复杂的模式。
Genetic studies on core versus peripheral populations have yielded many patterns. This diversity in genetic patterns may reflect diversity in the meaning of “peripheral populations” as defined by geography, gene flow patterns, historical effects, and ecological conditions. Populations at the lower latitude periphery of a species’ range are of particular concern because they may be at increased risk for extinction due to global climate change. In this work we aim to understand the impact of landscape and ecological factors on different geographical types of peripheral populations with respect to levels of genetic diversity and patterns of local population differentiation. We examined three geographical types of peripheral populations of the endangered salamander, Salamandra infraimmaculata, in Northern Israel, in the southernmost periphery of the genus Salamandra, by analyzing the variability in 15 microsatellite loci from 32 sites. Our results showed that: (1) genetic diversity decreases towards the geographical periphery of the species’ range; (2) genetic diversity in geographically disjunct peripheral areas is low compared to the core or peripheral populations that are contiguous to the core and most likely affected by a founder effect; (3) ecologically marginal conditions enhance population subdivision. The patterns we found lead to the conclusion that genetic diversity is influenced by a combination of geographical, historical, and ecological factors. These complex patterns should be addressed when prioritizing areas for conservation.
将种群结构与种群历史分离：对虎蝾螈 Ambystoma tigrinum 线粒体 DNA 单倍型地理分布的分支分析。
影响因子：
3.3
作者：
Templeton,AR;Routman,E;Phillips,CA
通讯作者：
Phillips,CA