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首页> 外文期刊>Marine ecology progress series >Age-structured genetic analysis reveals temporal and geographic variation within and between two cryptic rockfish species
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Age-structured genetic analysis reveals temporal and geographic variation within and between two cryptic rockfish species

机译：年龄结构遗传分析揭示了两个隐性石鱼物种内部和之间的时间和地理差异

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摘要

The spatial patterns of genetic structure among juveniles of long-lived species can reveal the extent of interannual and geographic variation in realized larval dispersal as well as the processes that determine ecologically relevant patterns of population connectivity. However, few studies examine this temporal and spatial variation over large portions of a species' geographic range or between cryptic species that overlap in their range. Despite the potential for long-distance dispersal in blue rockfish Sebastes mystinus, a previous study of adults revealed two geographically distinct, cryptic species. To determine year-to-year variation in the patterns of spatial connectivity and to elucidate the potential ecological mechanisms involved in shaping new year-classes and maintaining cryptic species, we sampled juveniles within California, USA, where both cryptic species coexist. Using microsatellite markers, we found geographic and temporal variation in the number of individuals from these distinct cryptic species within 2 new year-classes of juvenile S. mystinus. We also found differences in the geographic patterns of genetic structure of the 2 cryptic species. Whereas one species exhibited little or no spatial genetic structure across the study region, the other exhibited a complex geographic pattern of genetic structure, with little or no genetic structure among regions, but small-scale structure within a region. The results of this study demonstrate that the spatial scales and patterns of realized dispersal of pelagic larvae vary geographically, interannually, and between closely related species with similar life-history strategies. Therefore, estimates of dispersal based on larval duration and patterns of adult structure need to be interpreted cautiously.
机译：长寿物种少年之间遗传结构的空间格局可以揭示已实现幼虫传播的年际和地理变化程度，以及确定种群连通性的生态相关格局的过程。但是，很少有研究在物种地理范围的大部分上或在其范围重叠的隐密物种之间研究这种时空变化。尽管有可能在蓝色岩鱼Sebastes mystinus中进行长距离传播，但先前对成年动物的研究发现，这两个物种在地理上是不同的，隐秘的物种。为了确定空间连通性模式的逐年变化并阐明形成新的年级和维护隐性物种的潜在生态机制，我们在美国加利福尼亚州的两个未成年物种共存的幼年中进行了抽样调查。使用微卫星标记，我们发现了在2个新的年度类S. mystinus中，这些不同的隐性物种的个体数量的地理和时间变化。我们还发现了两种隐性物种遗传结构的地理格局差异。一个物种在整个研究区域内几乎没有空间遗传结构，而另一物种则具有复杂的遗传结构地理格局，区域间几乎没有遗传结构，而一个区域内的规模很小。这项研究的结果表明，中上层幼虫实现扩散的空间尺度和模式在地理，年际以及具有相似生活史策略的密切相关物种之间均存在差异。因此，需要谨慎地解释基于幼虫持续时间和成虫结构模式的扩散估计。

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  • 来源
    《Marine ecology progress series》 |2011年第5期|p.201-215|共15页
  • 作者

    Martha O. Burford; Mark H. Carr; Giacomo Bernardi;

  • 作者单位

    Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 100 Shaffer Road, Santa Cruz,California 95060, USA,Department of Biology, University of Central Oklahoma, 100 North University Drive, Edmond,Oklahoma 73034, USA;

    Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 100 Shaffer Road, Santa Cruz,California 95060, USA;

    Department of Ecology and Evolutionary Biology, University of California Santa Cruz, 100 Shaffer Road, Santa Cruz,California 95060, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cryptic species; range expansion; ecological genetics; local adaptation sebastes spp;

    机译：神秘物种范围扩大;生态遗传学;地方适应阻碍了;

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