Differential dispersal shapes population structure and patterns of genetic differentiation in two sympatric pond breeding salamanders
Differential dispersal shapes population structure and patterns of genetic differentiation in two sympatric pond breeding salamanders
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差异扩散影响两种同域池塘养殖蝾螈的种群结构和遗传分化模式
DOI：
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发表时间：
2015
影响因子：
2.2
通讯作者：
L. Eggert
中科院分区：
文献类型：
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作者：
W. Peterman;T. Anderson;B. H. Ousterhout;D. Drake;R. D. Semlitsch;L. Eggert
了解扩散、基因流动和种群分化的模式对于做出明智的管理和保护决策至关重要。通过评估多个同域物种的这些过程，我们可以增加管理计划的通用性和适用性。在这项研究中，我们评估了遗传分化和种群结构的模式在两个生态相似的钝口蝾螈在密苏里州，美国。Ambystoma annulatum和A.斑点蝾螈都依赖森林生境和无鱼池塘繁殖，但它们的繁殖物候不同。在比较这些物种时，我们评估了我们假设影响遗传分化的五个不同过程的支持：（1）景观特征对运动的抵抗力，（2）繁殖栖息地的分布，（3）扩散倾向，（4）扩散能力，（5）繁殖栖息地质量。在这些假设中，我们发现支持分散能力和倾向的差异。在这两个物种中，有一个强烈的隔离模式的距离。然而，A. annulatum具有较大的总体分化（$$F_{\rmST}^{\prime} = 0.31 $$FST ′=0.31），分化率随距离的增加而增大，并可分为3个空间一致的遗传簇。与此相反，A. maculatum由一个单一的群体集群和整体$$F_{\rmST}^{\prime}$$FST '为0.047。估计了A. annulatum和A. maculatum分别为1,693 m和2,050 m。我们的研究结果强调了在制定管理标准时考虑多个物种的重要性，以更好地解释扩散能力的差异。
Understanding patterns of dispersal, gene flow, and population differentiation are critical to making informed management and conservation decisions. By assessing these processes in multiple sympatric species, we can increase the generality and applicability of management plans. In this study, we assess patterns of genetic differentiation and population structure in two ecologically similar ambystomatid salamanders in Missouri, USA. Ambystoma annulatum (ringed salamander) and A. maculatum (spotted salamander) are both dependent upon forested habitats and fishless ponds for reproduction, but differ in their breeding phenology. In comparing these species, we assessed the support for five different processes that we hypothesized to affect genetic differentiation: (1) resistance of landscape features to movement, (2) distribution of breeding habitat, (3) dispersal propensity, (4) dispersal ability, and (5) breeding habitat quality. Of these hypotheses, we found support for differences in dispersal ability and propensity. In both species, there was a strong pattern of isolation-by-distance. However, A. annulatum exhibited greater overall differentiation ($$F_{\rm ST}^{\prime} = 0.31$$FST′=0.31 ), had a greater rate of differentiation increase with distance, and were grouped into three spatially congruent genetic clusters. In contrast, A. maculatum consisted of a single population cluster and overall $$F_{\rm ST}^{\prime}$$FST′ was 0.047. We estimated the mean genetic dispersal distance of A. annulatum and A. maculatum to be 1,693 m and 2,050 m, respectively. Our results underscore the importance of considering multiple species when developing management criteria to better account for differences in dispersal ability.
DOI：
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发表时间：
2015-10
期刊：
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影响因子：
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作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
通讯作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker