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首页> 外文期刊>Estuarine Coastal and Shelf Science >Estuarine habitats structure zooplankton communities: Implications for the pelagic trophic pathways
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Estuarine habitats structure zooplankton communities: Implications for the pelagic trophic pathways

机译：河口栖息地构成浮游动物群落：对中上层营养途径的影响

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摘要

Estuarine ecosystems have been described as a mosaic of habitats exhibiting different physical, biological and chemical properties and processes. These habitats are of primary importance for fishes, providing refuges and/or food for juveniles. While it is well known that habitats contribute also to the structuration of meio- and macrobenthic assemblages, this concept of habitat has never been associated to zooplankton communities, a major food resource for many pelagic fishes during summer in North European estuaries. The objective of this work was thus to assess if estuarine habitats, in addition to the salinity gradient, structured zooplankton communities as well. Sampling was conducted at high tide during summer in a highly turbid system, the Gironde estuary, for which primary production and thus food resource at the basis of the food web is strongly limited. The results showed that even if the upstream-downstream estuarine gradient was the main factor structuring zooplankton at the scale of the estuary, there was a significant difference of zooplankton assemblages between samples collected over subtidal areas and those collected over intertidal areas. More particularly, the estuarine gradient was associated to the distribution pattern of species while difference between subtidal and intertidal samples were mainly due to difference in the level of abundance of species. Stable isotope analysis revealed that these zooplanktonic omnivorous species may be attracted to intertidal mudflats by microphytobenthos availability and that some planktivorous fishes, in particular Alosa fallax, preferentially fed on this zone. The role of intertidal habitats in structuring zooplankton assemblages suggests that this habitat strongly participates to the production of planktivorous species and that it represents a biotic vector of carbon resources toward subtidal areas. The loss of tidal flats habitats could thus have consequences on the functioning of pelagic system as well. (C) 2016 Elsevier Ltd. All rights reserved.
机译：河口生态系统已被描述为具有不同物理，生物和化学特性及过程的栖息地的马赛克。这些栖息地对鱼类至关重要，为少年提供庇护和/或食物。虽然众所周知，生境也有助于中小型和大型底栖动物组合的结构，但这种生境的概念从未与浮游动物群落相关联，浮游动物群落是北欧河口夏季许多浮游鱼类的主要食物资源。因此，这项工作的目的是评估除盐度梯度以外的河口栖息地是否也构成了浮游动物群落。在夏季，在高浊度的吉伦特河口，在涨潮时进行采样，为此，主要生产以及因此基于食物网的食物资源受到很大限制。结果表明，即使上游-下游河口梯度是构成河口规模浮游动物的主要因素，在潮间带以上区域和潮间带以上区域采集的浮游动物组合之间也存在显着差异。更具体地说，河口梯度与物种的分布模式有关，而潮间带和潮间带样品之间的差异主要是由于物种丰度水平的差异。稳定的同位素分析表明，这些浮游动物杂食性物种可能由于微底栖鱼类的可利用性而被吸引到潮间带滩涂，并且一些浮游性鱼类，特别是Alosa fallax，优选在该区域觅食。潮间带生境在构造浮游动物组合中的作用表明，该生境强烈参与了浮游鱼类的生产，它代表了向潮下带碳资源的生物载体。因此，滩涂栖息地的丧失也可能对浮游系统的功能产生影响。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Estuarine Coastal and Shelf Science》 |2016年第20期|99-111|共13页
  • 作者

    David Valerie; Selleslagh Jonathan; Nowaczyk Antoine; Dubois Sophie; Bachelet Guy; Blanchet Hugues; Gouillieux Benoit; Lavesque Nicolas; Leconte Michel; Savoye Nicolas; Sautour Benoit; Lobry Jeremy;

  • 作者单位

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Univ Bordeaux, CNRS, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France;

    Irstea, Ctr Bordeaux, UR EABX, 50 Ave Verdun Gazinet, F-33612 Cestas, France;

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  • 正文语种 eng
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  • 关键词

    Zooplankton; Estuary; Tidal flats; Salinity gradients; Food web; Fish;

    机译：浮游动物;河口;滩涂;盐度梯度;食物网;鱼;

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