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首页> 外文期刊>Estuarine Coastal and Shelf Science >Reduction of flatfish habitat as a consequence of the proliferation of an invasive mollusc
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Reduction of flatfish habitat as a consequence of the proliferation of an invasive mollusc

机译：侵入性软体动物繁殖导致比目鱼栖息地减少

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摘要

Coastal bays provide habitats for juveniles and adults of many marine species. Mont Saint-Michel Bay (MSMB, France) hosts a highly diversified fish community and constitutes one of the most important nursery grounds for many commercially exploited marine species, such as sea bass, flatfish, clupeids and rays in the English Channel. Besides, MSMB also suffers from the massive invasion of an exotic mollusc, the American slipper-limpet (Crepidula fomicata, L). This species arrived four decades ago and now represents the main filter-feeder biomass in the bay (150 Mt), an order of magnitude larger than local farmed and natural shellfishes. Recent analyses underlined the impact of this small gastropod on the trophic structure of this bay and its negative influence on juvenile sole densities in the nursery grounds. The present study uses a geostatistical approach to explore the effect of the extension of the slipper-limpet on flatfish (common sole Solea solea, L; plaice Pleuronectes platessa, L; brill Scophthalmus rhombus, L. and flounder Platichthys flesus, L) spatial distribution. Data collected during survey of the MSMB at the end of the 1970s and three decades later have been used to build interpolated maps of (1) slipper-limpet and (2) flatfish spatial distributions. Slipper-limpets were concentrated in a small area, in the western part of the MSMB, in the 1970s while today they occupy half of the bay. This rapid proliferation led to the decrease of available surface for flatfishes, which previously occupied the whole bay and are now restricted to its eastern part. The present study highlighted that the negative influence on fish habitat in MSMB is apparently more related to changes in the substratum than to trophic interactions. This invasion has possible consequences on flatfish population renewal at a large scale and may also damage other benthic or demersal species, such as rays.
机译：沿海海湾为许多海洋物种的少年和成年提供栖息地。圣米歇尔山湾（法国MSMB）拥有一个高度多样化的鱼类群落，是英吉利海峡许多商业开发的海洋物种（如鲈鱼，比目鱼，丘比特和rays鱼）的最重要育苗场之一。此外，MSMB还遭受了外来软体动物美国拖鞋帽贝（Crepidula fomicata，L）的大规模入侵。该物种四十年前到达，现在是海湾中主要的滤食生物（150 Mt），比当地养殖和天然贝类大一个数量级。最近的分析强调了这种小腹足纲动物对该海湾的营养结构的影响及其对育苗场中幼鱼的单足密度的负面影响。本研究使用地统计学方法研究了滑壁-贝类的扩展对比目鱼（普通的单一Solea solea，L； Pleuronectes platesa，L； Brill Scophthalmus rhombus，L。和比目鱼Platichthys flesus，L）的影响。在1970年代末和三十年后的MSMB调查中收集的数据已用于构建（1）拖鞋帽贝和（2）比目鱼空间分布的内插图。拖鞋帽贝在1970年代集中在MSMB西部的一小区域，而今天它们占据了海湾的一半。这种迅速扩散导致比目鱼的可用表面减少，而比目鱼以前占据了整个海湾，现在只限于其东部。本研究强调，MSMB对鱼类栖息地的负面影响显然与基质变化有关，而不与营养相互作用有关。这种入侵可能对比目鱼的大规模更新产生可能的影响，还可能损害其他底栖或沉没物种，例如射线。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2011年第1期|p.154-160|共7页
  • 作者

    C. Kostecki; S. Rochette; R. Girardin; M. Blanchard; N. Desroy; O. Le Pape;

  • 作者单位

    Universite Europeenne de Bretagne, UMR 985 Agrocampus Ouest, Inra Ecologie & Sante des Ecosystemes, Ecologie halieutique, Agrocampus Quest, 65 rue de St Brieuc, CS 84215,35042 Rennes, France;

    Universite Europeenne de Bretagne, UMR 985 Agrocampus Ouest, Inra Ecologie & Sante des Ecosystemes, Ecologie halieutique, Agrocampus Quest, 65 rue de St Brieuc, CS 84215,35042 Rennes, France;

    Universite Europeenne de Bretagne, UMR 985 Agrocampus Ouest, Inra Ecologie & Sante des Ecosystemes, Ecologie halieutique, Agrocampus Quest, 65 rue de St Brieuc, CS 84215,35042 Rennes, France;

    IFREMER, Laboratoire Benthos, departement DYNECO, BP70, 29280 Plouzane, France;

    FREMER, Laboratoire Environnement-Ressources Finistere-Bretagne Nord, CRESCO, 38 rue du Port Blanc, BP 80108, 35801 Dinard Cedex, France;

    Universite Europeenne de Bretagne, UMR 985 Agrocampus Ouest, Inra Ecologie & Sante des Ecosystemes, Ecologie halieutique, Agrocampus Quest, 65 rue de St Brieuc, CS 84215,35042 Rennes, France;

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  • 正文语种 eng
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  • 关键词

    spatial competition; flatfish habitat; crepidula fomicata; invasive species; mont saint-michel bay;

    机译：空间竞争;比目鱼栖息地;富密螺旋体;入侵物种;圣米歇尔山;

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