...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ICES Journal of Marine Science >Modelling the effect of demographic traits and connectivity on the genetic structuration of marine metapopulations of sedentary benthic invertebrates
【24h】

Modelling the effect of demographic traits and connectivity on the genetic structuration of marine metapopulations of sedentary benthic invertebrates

机译：建模人口统计学特征和连通性对久坐底栖无脊椎动物海生种群遗传结构的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Accounting for connectivity is essential in marine spatial planning and the proper design and management of marine protected areas, given that their effectiveness depends on the patterns of dispersal and colonization between protected and non-protected areas. The genetic structure of populations is commonly used to infer connectivity among distant populations. Here, we explore how population genetic structure is affected by pre- and settlement limitations with a spatially explicit coupled metapopulation-gene flow model that simulates the effect of demographic fluctuations on the allele frequencies of a set of populations. We show that in closed populations, regardless of population growth rate, the maintenance of genetic diversity at saturating initial population density increases with species life expectancy as a result of density-dependent recruitment control. Correlatively, at low initial population density, the time at which a population begins to lose its genetic diversity is driven larval and post-settlement mortality (comprised in the recruitment success parameter)-the larger the recruitment success, the stronger the genetic drift. Different spatial structures of connectivity established for soft bottom benthic invertebrates in the Gulf of Lions (NW Mediterranean, France) lead to very different results in the spatial patterns of genetic structuration of the metapopulation, with high genetic drift in sites where the local retention rate was larger than 2%. The effect of recruitment failure and the loss of key source populations on heterozygosity confirm that transient demographic fluctuations help maintain genetic diversity in a metapopulation. This study highlights the role of intraspecific settlement limitations due to lack of space when the effective number of breeders approaches saturating capacity, causing a strong reduction in effective reproduction. The present model allows to: (i) disentangle the relative contribution of local demography and environmental connectivity in shaping seascape genetics, and (ii) perform in silico evaluations of different scenarios for marine spatial planning.
机译：考虑到连通性的有效性取决于保护区和非保护区之间的扩散和殖民模式，在海洋空间规划以及正确设计和管理海洋保护区中，连通性至关重要。种群的遗传结构通常用于推断遥远种群之间的连通性。在这里，我们使用空间显式耦合元人口基因流动模型，通过模拟人口统计学波动对一组人口等位基因频率的影响，探索人口的遗传结构如何受到前期和定居限制的影响。我们显示，在封闭的种群中，无论种群增长率如何，由于密度依赖的募集控制，随着种群预期寿命的增长，饱和初始种群密度下的遗传多样性维持会增加。相应地，在较低的初始种群密度下，种群开始丧失遗传多样性的时间受到幼虫和定居后死亡率的影响（包括募集成功参数）-募集成功越大，遗传漂变越强。为狮子湾（法国西北地中海）的软底底栖无脊椎动物建立的连通性的不同空间结构，导致了该种群遗传结构的空间格局产生了截然不同的结果，在当地保留率高的地方遗传漂移很高大于2％。招聘失败和关键源种群丧失对杂合性的影响证实，短暂的人口统计学波动有助于维持种群中的遗传多样性。这项研究强调了当种鸡的有效数量接近饱和能力时，由于空间不足而造成种内定居限制的作用，从而导致有效繁殖的大幅减少。本模型允许：（i）消除局部人口统计学和环境连通性在塑造海景遗传学方面的相对贡献，以及（ii）对海洋空间规划的不同方案进行计算机评估。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号