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首页> 外文期刊>Ecological research >A freshwater ecoregion delineation approach based on freshwater macroinvertebrate community features and spatial environmental data in Taizi River Basin, northeastern China
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A freshwater ecoregion delineation approach based on freshwater macroinvertebrate community features and spatial environmental data in Taizi River Basin, northeastern China

机译：基于淡水大型无脊椎动物群落特征和空间环境数据的淡水生态区划定方法

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摘要

The ecoregion is currently widely used as the basic geospatial unit in freshwater biodiversity conservation. The popularly used delineation is usually based on the assumption that attributes of aquatic ecosystems are influenced by landscape-scale environmental variables. However, few ecoregion delineations attempt to establish the local validity of this assumption prior to delineation, and few studies check the correspondence of the derived ecoregion boundaries with the distributions of attributes of aquatic biota. In this study, we established an approach to overcome these shortcomings. The notable features of the approach are: (1) the delineation variables were filtered through a series of analytical steps to select those that best represented the aquatic community traits, and which avoided redundancy in the data; (2) the method was quantitative and repeatable; and (3) the derived ecoregion boundaries were checked for consistency with the spatial attributes of aquatic biota. The approach was applied in the Taizi River Basin, northeast China. The procedure proposed here filtered out altitude and annual precipitation as the best variables to include in the freshwater ecoregion delin-eation. Then, using the quantitative ISODATA classification method, the basin was classified into three ecoregions. A test of accuracy indicated that freshwater ecoregions matched well with the spatial distribution pattern of macroinvertebrate community attributes. Statistical analysis showed that natural geographical attributes and river attributes were different in the three ecoregions, and indices representing macroinvertebrate community attributes are significantly different as a whole among the three ecoregions. The case study proved this approach effective on ecoregion delineation.
机译：该生态区目前被广泛用作淡水生物多样性保护的基本地理空间单位。普遍使用的划界方法通常是基于以下假设：水生生态系统的属性受景观规模环境变量影响。但是，很少有生态区划定试图在划定之前确定该假设的局部有效性，并且很少有研究检查所得出的生态区边界与水生生物特征分布的对应关系。在这项研究中，我们建立了克服这些缺点的方法。该方法的显着特点是：（1）通过一系列分析步骤对轮廓变量进行过滤，以选择最能代表水生生物特征并避免数据重复的变量； （2）该方法定量且可重复； （3）检查得出的生态区边界与水生生物区系的空间属性是否一致。该方法已应用于中国东北的太子河流域。这里提出的程序过滤掉了海拔和年降水量，将其作为最佳变量包括在淡水生态区退化中。然后，采用定量ISODATA分类方法，将该流域分为三个生态区。准确性测试表明，淡水生态区与大型无脊椎动物群落属性的空间分布格局非常吻合。统计分析表明，三个生态区的自然地理属性和河流属性不同，而在三个生态区中，代表大型无脊椎动物群落属性的指标总体上也存在显着差异。案例研究证明了这种方法对生态区划定有效。

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  • 来源
    《Ecological research》 |2013年第4期|581-592|共12页
  • 作者

    Weijing Kong; Wei Meng; Yuan Zhang; Christopher Gippel; Xiaodong Qu;

  • 作者单位

    State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road,Chaoyang District, Beijing 100012, China;

    State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road,Chaoyang District, Beijing 100012, China;

    State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road,Chaoyang District, Beijing 100012, China;

    Melbourne School of Land and Environment,University of Melbourne, Parkville, VIC 3010, Australia Fluvial Systems Pty Ltd, Stockton, NSW 2295, Australia;

    State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beiyuan Road,Chaoyang District, Beijing 100012, China;

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  • 正文语种 eng
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  • 关键词

    Freshwater ecoregion delineation; Environmental variables; Aquatic biota; Variables filtration; Spatial cluster; Taizi River Basin;

    机译：淡水生态区划界;环境变量;水生生物群;变量过滤;空间集群;太子河流域;

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