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首页> 外文期刊>Marine ecology progress series >Population genetics of the invasive ctenophore Mnemiopsis leidyi in Europe reveal source-sink dynamics and secondary dispersal to the Mediterranean Sea
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Population genetics of the invasive ctenophore Mnemiopsis leidyi in Europe reveal source-sink dynamics and secondary dispersal to the Mediterranean Sea

机译：欧洲入侵性ten虫Mnemiopsis leidyi的种群遗传学揭示了源汇动力学和对地中海的二次扩散

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摘要

Repeated invasions of European waters by the ctenophore Mnemiopsis leidyi offer a unique opportunity to study population dynamics and dispersal in gelatinous zooplankton. Here we followed population establishment in 2 recently invaded areas, the North and Baltic Seas, and analysed changes in population structure during a 3 yr interval using 7 highly polymorphic microsatellites comprising 191 alleles. A second goal was to reconstruct routes of recent invasive range expansion into the Mediterranean Sea. During the study period (2008 to 2010), populations in the North Sea and Western Baltic Sea maintained their allelic composition with virtually unchanged levels of genetic diversity and between-population differentiation, demonstrating limited gene flow between the 2 regions and successful reproduction in both areas. In contrast, at the eastern distribution limit in the central Baltic (Bornholm Basin), the same measures fluctuated between years and genetic diversity decreased from 2008 to 2010. In concordance with prior ecological observations, this supports the view that M. leidyi in the central Baltic is a sink population. In the area of recent range expansion (Mediterranean Sea), we observed high population differentiation: pairwise differentiation (F_(ST)) values between sites in Spain, France and Israel were significant and between 0.04 and 0.16. Despite this differentiation, Bayesian clustering and phylo-geographic analysis support the hypothesis that all Mediterranean M. leidyi result from a secondary introduction originating from the Black Sea. Our study contributes to growing evidence that multiple invasions of the same species can vary in their degree of genetic diversity and demonstrates how genetic markers can help to resolve whether gelatinous plankton species form self-sustaining populations.
机译：Ctenophore Mnemiopsis leidyi反复入侵欧洲水域，为研究凝胶状浮游动物的种群动态和扩散提供了独特的机会。在这里，我们追踪了最近入侵的两个地区（北海和波罗的海）的种群建立情况，并使用7个高度多态的微卫星（包括191个等位基因）在3年的时间间隔内分析了种群结构的变化。第二个目标是重建最近侵入范围扩大到地中海的路线。在研究期间（2008年至2010年），北海和波罗的海的种群保持了等位基因组成，遗传多样性水平和种群之间的分化水平几乎保持不变，这表明两个区域之间的基因流量有限并且两个区域均成功繁殖。相反，在波罗的海中部（博恩霍尔姆盆地）的东部分布极限处，相同的测量方法在几年之间波动，并且从2008年到2010年遗传多样性有所下降。与先前的生态学观察一致，这支持了中部雷迪木波罗的海人口众多。在最近的范围扩展区域（地中海）中，我们观察到了高度的种群分化：西班牙，法国和以色列之间的站点之间的成对分化（F_（ST））值显着，介于0.04至0.16之间。尽管有这种区别，贝叶斯聚类和系统地理分析仍支持这样的假说，即所有地中海M. leidyi都源自于黑海的二次引入。我们的研究为越来越多的证据表明，同一物种的多次入侵可能会改变其遗传多样性程度，并证明了遗传标记物如何帮助解决凝胶状浮游生物物种是否形成自我维持的种群。

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  • 来源
    《Marine ecology progress series》 |2013年第27期|25-36|共12页
  • 作者

    Soeren Bolte; Veronica Fuentes; Holger Haslob; Bastian Huwer; Delphine Thibault-Botha; Dror Angel; Bella Galil; Jamileh Javidpour; Anthony G. Moss; Thorsten B. H. Reusch;

  • 作者单位

    Evolutionary Ecology of Marine Fishes, and GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany;

    Institut de Ciencies del Mar (CSIC), 08003 P. Maritim de la Barceloneta 37-49, 08003 Barcelona, Spain;

    Thuenen Institute of Sea Fisheries, Palmaille 9, 22767 Hamburg, Germany;

    National Institute of Aquatic Resources, Technical University of Denmark, Charlottenlund Castle, 2920 Charlottenlund, Denmark;

    Aix Marseille Universite, CNRS/INSU, IRD, Mediterranean Institute of Oceanography (MIO), UM 110,13288 Marseille, France;

    Department of Maritime Civilizations, Leon H. Charney School for Marine Science, University of Haifa, Mt Carmel, Haifa 31905, Israel;

    National Institute of Oceanography, Israel Oceanographic & Limnological Research, POB 8030, Haifa 31080, Israel;

    Marine Food Webs, GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany;

    Biological Sciences, Auburn University, 331 Funchess Hall, Auburn, Alabama 36849, USA;

    Evolutionary Ecology of Marine Fishes, and GEOMAR Helmholtz Centre for Ocean Research Kiel, Duesternbrooker Weg 20, 24105 Kiel, Germany;

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  • 正文语种 eng
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  • 关键词

    Invasive species; Source populations; Allelic richness; Jellyfish; Microsatellites; Baltic Sea; Mediterranean Sea;

    机译：入侵物种;来源人群;等位基因丰富;海蜇;微卫星;波罗的海;地中海;

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