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首页> 外文期刊>Limnologica >First records, pathways and distributions of four new Ponto-Caspian amphipods in France
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First records, pathways and distributions of four new Ponto-Caspian amphipods in France

机译：法国的四种新的里海两栖脚纲的首次记录，途径和分布

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摘要

In Europe, the number of establishment of non-native species, especially from Ponto-Caspian area, has dramatically increased over the past decades and induced important changes in macroinvertebrate assemblages, mainly in large rivers. However, although many Ponto-Caspian species were established in adjacent countries, only two Ponto-Caspian amphipods were formally observed in French hydrosystems since 1996. To update our knowledge on the present distribution of the Ponto-Caspian species in France, we collected amphipods from 203 sites in the Rhine, Meuse and Seine River basins in 2008 and again in 2009. Thirteen amphipod species were found in the study area. Among them, four were first formally recorded in France (Dikerogammarus haemobaphes, Dikerogammarus bispinosus, Echinogammarus ischnus, and Echinogammarus trichiatus). Our study revealed three different corridors used by these species to arrive in France. We also observed a different pattern of colonization for each species, which might indicate some between-species differences in their preferences for environmental conditions. The snapshot of the early distributions of these recently established species may hence be used to study the invasion pattern in France in order to manage their potential impact in and outside France.
机译：在欧洲，过去几十年来，非本地物种（特别是蓬图-里海地区）的建立数量急剧增加，并引起了主要在大河流中的大型无脊椎动物种群的重要变化。但是，尽管在邻国建立了许多蓬图里海种类，但自1996年以来在法国水系中仅观察到两个蓬图里两栖动物。为了更新我们对法国蓬图里斯种类目前分布的了解，我们从莱茵河，默兹河和塞纳河流域的203个站点分别在2008年和2009年再次出现。在研究区域发现了13种两栖动物。其中，有四个是在法国首次正式记录的（Dikerogammarus haemobaphes，Dikerogammarus bispinosus，Echinogammarus ischnus和Echinogammarus trichiatus）。我们的研究揭示了这些物种用来到达法国的三种不同的走廊。我们还观察到每个物种的定殖模式不同，这可能表明它们对环境条件的偏好存在一些种间差异。这些最近建立的物种的早期分布的快照因此可以用来研究法国的入侵模式，以便管理它们在法国内外的潜在影响。

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