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首页> 外文期刊>Limnologica >Environmental determinants of species turnover of aquatic Heteroptera in freshwater ecosystems of the Western Ghats, India
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Environmental determinants of species turnover of aquatic Heteroptera in freshwater ecosystems of the Western Ghats, India

机译：印度沼于沼泽地淡水生态系统中水生杂交百叶草种类的环境决定因素

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Partitioning beta diversity into its two components of spatial turnover and nestedness is a more robust method for checking spatial variability in biological communities than calculating the total beta diversity alone. The relative contribution of spatial turnover and nestedness has been used to test the effects of climatic, environmental, spatial and temporal variables on community composition. In this study, we tested the effects of environmental factors and microhabitat features on total beta diversity and its spatial turnover and nestedness components using a comprehensive dataset of aquatic Heteroptera collected from four types of permanent freshwater habitats (i.e. streams, ponds, rock tanks and reservoirs) in the Western Ghats of India. We observed that communities in all four types of habitats were predominantly shaped by dissimilarity caused due to spatial turnover ( > 85 %). Each type of habitat showed the presence of one or more species uniquely associated with it, which might contribute to the turnover between communities. The abiotic environment (climatic factors, topological factors, soil characteristics and microhabitat features) as well as assemblage structure differed significantly between habitat types. Communities in each type of habitat were affected by different environmental factors, such as precipitation and temperature patterns for streams, altitude and rocky substrate for rock tanks, and soil characteristics and the presence of aquatic macrophytes for ponds and reservoirs. Assemblages observed in the four types of permanent habitats are thus compositionally distinct due to species replacements between local communities, which in turn are strongly influenced by environmental variables. Similar to previous studies, our results show that spatial turnover largely measures the same phenomenon as total beta diversity on a regional scale.
机译：将β多样性分成其两个空间周转和嵌套的组件是一种更强大的方法，用于检查生物群中的空间变异，而不是单独计算总β多样性。空间周转和嵌套的相对贡献已被用于测试气候，环境，空间和时间变量对社区组成的影响。在这项研究中，我们通过从四种永久性淡水栖息地收集的水生杂曲线（即流，池塘，岩石坦克和水库）在印度的西阁楼。我们观察到所有四种类型的栖息地的社区都是由于空间周转导致（> 85％）引起的异化而形成。每种类型的栖息地都显示出一种或多种与其相关的物种，这可能导致社区之间的成交。非生物环境（气候因子，拓扑因子，土壤特性和微藻特征）以及栖息地类型之间的组合结构有显着不同。每种栖息地的社区都受到不同环境因素的影响，例如岩石罐的流，高度和岩石基材的降水和温度模式，以及土壤特征以及用于池塘和水库的水生型宏观物质的存在。由于当地社区之间的种类替代，因此在四种类型的永久性栖息地中观察到的组合性地具有与本地社区之间的物种的替代品不同，这反过来又受环境变量的强烈影响。与以往的研究类似，我们的结果表明，空间趋势在很大程度上测量与区域规模的总β多样化相同的现象。

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