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首页> 外文期刊>International journal of river basin management >Sandy rivers: a review on general ecohydrological patterns of benthic invertebrate assemblages across continents
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Sandy rivers: a review on general ecohydrological patterns of benthic invertebrate assemblages across continents

机译：沙河：回顾各大洲底栖无脊椎动物组合的一般生态水文模式

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摘要

The middle and lower sections of most large rivers have fine-grained bed sediments, which may have a strong influence on the functional and taxo-nomical structure of benthic invertebrates. Based on results from several studies by the authors on the faunal assemblages and habitat structures of the Paraguay-Parana River system (Brazil, Paraguay, Argentina), from European (Rhine, Loire) River systems, and data from the literature, this review identifies general patterns which appear to have a global character. On one hand, the invertebrate assemblages largely differed between the main channel (MC) and the corresponding floodplain habitats in different sections, and also the floodplain habitats along the river channel revealed great differences in their biodiversity. On the other hand, there was a remarkable homogeneity among the main-channel sections within and even between river systems. We consider physical habitat features as the crucial variables responsible for these patterns. In cross-sections from the MC towards the floodplain habitats, grain size, organic matter content and oxygen supply change dramatically, and different floodplain habitats along the same river system may have different successional stages even at small geographical distances. The sandy structure of potamal habitats (including underwater dunes), however, provides a set of habitat features characterized by continuously changing sediment structures with well-defined grain sizes, low organic matter contents and good oxygenation, which force a set of adaptations by the invertebrates that limits but stabilizes the diversity of invertebrates in these large river sections. A better understanding of the ecohydrological interactions between habitat dynamics and benthic invertebrates is needed to improve sustainable river ecosystem management. We discuss the non-recovery of large benthic invertebrate species in the lower section of large rivers after improvement of the water quality in the context of these ecohydrological features. Conclusions are drawn for river restoration.
机译：大多数大型河流的中下部都有细粒床沉积物，这可能会对底栖无脊椎动物的功能和分类结构产生很大影响。基于作者对欧洲（莱茵河，卢瓦尔河）巴拉圭-巴拉那河水系（巴西，巴拉圭，阿根廷）的动物群组成和栖息地结构进行的多项研究的结果，以及来自文献的数据，本文认为具有整体特征的一般模式。一方面，主河道（MC）与不同断面的相应洪泛区生境之间的无脊椎动物组合差异很大，而且河道沿岸的洪泛区生境也揭示了其生物多样性的巨大差异。另一方面，河流系统内部甚至河流系统之间的主要河道部分具有​​显着的同质性。我们认为自然栖息地特征是造成这些模式的关键变量。在从MC到洪泛区生境的横截面中，粒径，有机质含量和氧气供应发生了巨大变化，即使在较小的地理距离上，同一河流系统中不同的洪泛区生境也可能具有不同的演替阶段。但是，波塔姆生境（包括水下沙丘）的沙质结构提供了一系列生境特征，其特征是不断变化的沉积物结构具有明确的粒度，低有机质含量和良好的氧合作用，这迫使无脊椎动物适应一系列变化限制但稳定了这些大河段中无脊椎动物的多样性。需要更好地了解栖息地动态与底栖无脊椎动物之间的生态水文学相互作用，以改善可持续的河流生态系统管理。在这些生态水文特征的背景下，我们讨论了水质改善后大河下游大型底栖无脊椎动物物种的非恢复性。得出了河流恢复的结论。

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    KARL M. WANTZEN; MARTIN C. M. BLETTLER; MERCEDES R. MARCHESE; MARIO L. AMSLER; MICHEL BACCHI; INES D. EZCURRA DE DRAGO; EDMUNDO E. DRAGO;

  • 作者单位

    UNESCO River Culture (Fleuve et Patrimoine), Interdisciplinary Research Center for Cities, Territories, Environment and Society (CITERES-CNRS UMR 7324), Universite Francois Rabelais, Parc Grandmont, 37200 Tours, France;

    Instituto Nacional de Limnologia (INALI CONICET-UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina;

    Instituto Nacional de Limnologia (INALI CONICET-UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina;

    Instituto Nacional de Limnologia (INALI CONICET-UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina Facultad de Ingenieria y Ciencias Hidricas, Universidad Nacional del Litoral, Centro Internacional de Estudios de Grandes Rios, C.C. 217 - 3000 Santa Fe, Argentina;

    Interdisciplinary Research Center for Cities, Territories, Environment and Society (CITERES-CNRS UMR 7324), Universite Francois Rabelais, Parc Grandmont, 37200 Tours, France;

    Instituto Nacional de Limnologia (INALI CONICET-UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina;

    Instituto Nacional de Limnologia (INALI CONICET-UNL), Ciudad Universitaria, 3000 Santa Fe, Argentina;

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  • 正文语种 eng
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  • 关键词

    Benthic invertebrate assemblages; underwater sand dunes; Paraguay River; Parana River; Loire River; ecohydraulics;

    机译：底栖无脊椎动物组合;水下沙丘巴拉圭河;巴拉那河;卢瓦尔河;生态液压;

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