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首页> 外文期刊>Marine ecology >Evaluating the genetic effects of the invasive Ocenebra inornata on the native oyster drill Ocenebra erinacea
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Evaluating the genetic effects of the invasive Ocenebra inornata on the native oyster drill Ocenebra erinacea

机译：评估入侵Ocenebra inornata对天然牡蛎钻Oerenebra erinacea的遗传效应

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摘要

Studies focusing on the effect of invasive species on the genetic diversity of native marine invertebrates remain scant. Here we report diversity among French populations of the intertidal gastropod Ocenebra erinacea (Linnaeus, 1758) sampled in the presence and absence of the invasive Ocenebra inornata (Recluz, 1851). Between 1999 and 2004, a total of 352 individuals of O. erinacea was collected from 15 sites (five of which had the invasive present) and was genotyped at the mitochondrial locus Cytochrome Oxidase 1 (cox1). No statistical difference was observed between polymorphism levels recorded within native populations exposed to the invasive, compared with populations sampled in the absence of O. inornata. No sign of native population decline was detected in response to the invader. While significant shifts in native O. erinacea population sizes have previously been reported in the literature, genetic effects may take longer to accumulate, or may be undetectable without a larger panel of genetic markers. By contrast, large genetic distances and significant population differentiation were recorded between Atlantic and Mediterranean O. erinacea samples, suggesting that these populations have distinct evolutionary histories. Comparison of genetic divergence within the closely related genus Nucella suggests that the Atlantic populations of O. erinacea and those from Thau Lagoon in the Mediterranean may belong to different species or subspecies.
机译：专注于入侵物种对本地海洋无脊椎动物遗传多样性影响的研究仍然很少。在这里，我们报告了在存在和不存在侵袭性Ocenebra inornata（Recluz，1851）的情况下采样的潮间腹足纲Ocenebra erinacea（Linnaeus，1758）的法国人群之间的多样性。在1999年至2004年之间，从15个位点（其中5个存在侵袭性）收集了352股大叶鸢尾花，并在线粒体细胞色素氧化酶1（cox1）上进行了基因分型。与在没有稻瘟病菌的情况下采样的种群相比，在暴露于侵入性的本地种群中记录的多态性水平之间没有观察到统计学差异。没有发现对入侵者有反应的本地人口减少的迹象。虽然以前在文献中已经报道了天然的O. erinacea种群大小发生了显着变化，但是积累的遗传效应可能需要更长的时间，或者如果没有更多的遗传标记，则可能无法检测到。相比之下，大西洋和地中海O. erinacea样品之间记录了较大的遗传距离和显着的种群分化，这表明这些种群具有独特的进化史。比较近亲属努塞拉（Nucella）内的遗传差异，表明非洲的O. erinacea种群和地中海的Thau Lagoon种群可能属于不同的物种或亚种。

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