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首页> 外文期刊>Estuarine Coastal and Shelf Science >Worldwide patterns of fish biodiversity in estuaries: Effect of global vs. local factors
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Worldwide patterns of fish biodiversity in estuaries: Effect of global vs. local factors

机译：河口鱼类生物多样性的全球格局：全球因素与地方因素的影响

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摘要

The main ecological patterns and the functioning of estuarine ecosystems are difficult to evaluate due to natural and human induced complexity and variability. Broad geographical approaches appear particularly useful. This study tested, at a worldwide scale, the influence of global and local variables in fish species richness in estuaries, aiming to determine the latitudinal pattern of species richness, and patterns which could be driven by local features such as estuary area, estuary mouth width, river flow and intertidal area. Seventy one estuarine systems were considered with data obtained from the literature and geographical information system. Correlation tests and generalized linear models (GLM) were used in data analyses. Species richness varied from 23 to 153 fish species. GLM results showed that estuary area was the most important factor explaining species richness, followed by latitude and mouth width. Species richness increased towards the equator, and higher values were found in larger estuaries and with a wide mouth. All these trends showed a high variability. A larger estuary area probably reflects a higher diversity of habitats and/or productivity, which are key features for estuarine ecosystem functioning and biota. The mouth width effect is particularly notorious for marine and diadromous fish species, enhancing connectivity between marine and freshwater realms. The effects of river flow and intertidal area on the fish species richness appear to be less evident. These two factors may have a marked influence in the trophic structure of fish assemblages. (C) 2015 Elsevier Ltd. All rights reserved.
机译：由于自然和人为因素引起的复杂性和变异性，难以评估主要的生态模式和河口生态系统的功能。广泛的地理方法似乎特别有用。这项研究在全球范围内测试了全球和局部变量对河口鱼类物种丰富度的影响，旨在确定物种丰富度的纬度格局，以及可能由诸如河口面积，河口口宽等局部特征驱动的格局，河流流量和潮间带。考虑了从文献和地理信息系统获得的数据的71个河口系统。相关分析和广义线性模型（GLM）用于数据分析。物种丰富度从23种到153种不等。 GLM结果表明，河口面积是解释物种丰富度的最重要因素，其次是纬度和嘴巴宽度。物种丰富度向赤道增加，在较大的河口和张开的嘴中发现较高的值。所有这些趋势都显示出高度的可变性。较大的河口区域可能反映出栖息地和/或生产力的更高多样性，这是河口生态系统功能和生物区系的关键特征。口宽效应对于海洋和淡水鱼类特别臭名昭著，增强了海洋和淡水领域之间的连通性。河流流量和潮间带面积对鱼类物种丰富度的影响似乎不太明显。这两个因素可能对鱼类组合的营养结构有显着影响。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2015年第5期|122-128|共7页
  • 作者

    Pasquaud Stephanie; Vasconcelos Rita P.; Franca Susana; Henriques Sofia; Costa Maria Jose; Cabral Henrique;

  • 作者单位

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, Campo Grande, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, Campo Grande, P-1749016 Lisbon, Portugal|Univ Lisbon, Fac Ciencias, Campo Grande, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, Campo Grande, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, Campo Grande, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, Campo Grande, P-1749016 Lisbon, Portugal;

    Univ Lisbon, Fac Ciencias, MARE Marine & Environm Sci Ctr, Campo Grande, P-1749016 Lisbon, Portugal;

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  • 正文语种 eng
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  • 关键词

    worldwide patterns; fish; species richness; estuaries; latitude; local factors;

    机译：世界格局;鱼类;物种丰富度;河口;纬度;地方因素;

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