Effects of geography and life history traits on genetic differentiation in benthic marine fishes
Effects of geography and life history traits on genetic differentiation in benthic marine fishes
复制标题
地理和生活史性状对底栖海洋鱼类遗传分化的影响
DOI：
10.1111/j.1600-0587.2010.06511.x
复制
发表时间：
2011
期刊：
影响因子：
5.9
通讯作者：
E. Treml
中科院分区：
文献类型：
--
作者：
Cynthia Riginos;Kristina E. Douglas;Young K. Jin;Danielle F. Shanahan;E. Treml
浮游幼虫的扩散可以在地理上分离的海底海洋动物成年种群之间建立联系。地理环境和生活史特征如何影响这些联系在很大程度上还没有解决。我们使用来自底栖硬骨鱼遗传研究(物种水平FST)的数据并结合线性模型来评估生物地理区域、地理距离、卵类型(底栖卵或中上层卵)、中上层幼体持续时间(PLD)和遗传标记类型之间的转换作为影响物种内分化的因素的重要性。我们发现，生物地理区域和卵型之间的转换对种群遗传结构有显著和一致的贡献，而PLD不能显著解释种群结构。总研究距离经常有助于显著的交互作用项，特别是与遗传标记相关的，因此对于使用mtDNA序列的研究，FST随着研究距离的增加而增加，但等位酶和微卫星研究表明FST没有随着研究距离的增加而增加。这些结果强调了空间环境(生物地理和地理距离)在影响遗传分化中的重要性，并暗示了与卵型相关的传播能力存在内在差异。我们还发现，种群之间出现最大成对FST的地理距离(相对于总研究距离)是高度可变的，可以在任何尺度上观察到。这一结果与夸大遗传分化和/或没有充分考虑与连接相关的地理和生物因素的随机过程是一致的。
Dispersal of planktonic larvae can create connections between geographically separated adult populations of benthic marine animals. How geographic context and life history traits affect these connections is largely unresolved. We use data from genetic studies (species level FST) of benthic teleost fishes combined with linear models to evaluate the importance of transitions between biogeographic regions, geographic distance, egg type (benthic or pelagic eggs), pelagic larval duration (PLD), and type of genetic marker as factors affecting differentiation within species. We find that transitions between biogeographic regions and egg type are significant and consistent contributors to population genetic structure, whereas PLD does not significantly explain population structure. Total study distance frequently contributes to significant interaction terms, particularly in association with genetic markers, whereby FST increases with study distance for studies employing mtDNA sequences, but allozyme and microsatellite studies show no increase in FST with study distance. These results highlight the importance of spatial context (biogeography and geographic distance) in affecting genetic differentiation and imply that there are inherent differences in dispersal ability associated with egg type. We also find that the geographic distance over which the maximum pairwise FST between populations occurs (relative to total study distance) is highly variable and can be observed at any scale. This result is consistent with stochastic processes inflating genetic differentiation and/or insufficient consideration of geographic and biological factors relevant to connectivity.