Current and historical patterns of drainage connectivity in eastern Australia inferred from population genetic structuring in a widespread freshwater fish Pseudomugil signifer (Pseudomugilidae)
Current and historical patterns of drainage connectivity in eastern Australia inferred from population genetic structuring in a widespread freshwater fish Pseudomugil signifer (Pseudomugilidae)
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根据广泛分布的淡水鱼 Pseudomugil signifer（Pseudomugilidae）的种群遗传结构推断出澳大利亚东部排水系统连通性的当前和历史模式
DOI：
10.1046/j.1365-294x.2003.02085.x
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发表时间：
2004
影响因子：
4.9
通讯作者：
D. McGlashan
中科院分区：
文献类型：
--
作者：
B. B. Wong;J. Keogh;D. McGlashan
扩散可以在自然种群的遗传结构中发挥重要作用。在这方面，淡水鱼往往表现出广泛的种群遗传细分，是研究流域之间联系和分离的当前和历史模式的理想对象。我们着手为来自澳大利亚东部的一种广泛存在的淡水鱼--太平洋蓝眼鱼--建立一个全面的分子系统发育图。虽然通过洪水事件的迁移在物种范围的南端可能是重要的，但遗传结构揭示了历史上的排水连接和解离在调解或破坏扩散方面的重要性。我们系统发展的一个主要特征是北部和南部种群的分裂，这似乎与最近被认为对澳大利亚东部淡水生物的连通性重要的生物地理障碍相一致。分裂的程度还具有分类学上的含义，这与太平洋蓝眼可能代表不止一个物种的说法一致。
Dispersal can play an important role in the genetic structuring of natural populations. In this regard, freshwater fishes often exhibit extensive population genetic subdivision and are ideal subjects for investigating current and historical patterns of connection and dissociation between drainages. We set out to generate a comprehensive molecular phylogeny for a widespread freshwater fish from eastern Australia, the Pacific blue‐eye Pseudomugil signifer. Although movement via flood events may be important in the southern end of the species’ range, genetic structuring revealed the importance of historical drainage connections and dissociations in mediating or disrupting dispersal. A dominant feature of our phylogeny is a split between northern and southern populations, which appears to be congruent with a biogeographical barrier recently implicated as important for the connectivity of freshwater organisms in eastern Australia. The extent of the split also has taxonomic implications consistent with suggestions that the Pacific blue‐eye may represent more than a single species.