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首页> 外文期刊>Lakes & Reservoirs >Does distance between aquatic plant assemblages matter in defining similarity between them during high water-level periods?
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Does distance between aquatic plant assemblages matter in defining similarity between them during high water-level periods?

机译：在高水位期间，水生植物组合之间的距离对定义它们之间的相似性是否重要？

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摘要

Aquatic environments are subject to natural water-level fluctuations. These fluctuations, in turn, are responsible for causing changes in biota in the aquatic environment, particularly those that colonize floodplains. The flood pulse concept predicts that water-level fluctuations are responsible for the formation of mosaics in biota at a small scale. During high water-level periods, however, there is evidence that the similarity among biological assemblages increases. Within this theoretical context, the present study focuses on determining whether or not the spatial distance between assemblages is a relevant factor for the similarity among them during high water-level periods and, if not, what environmental variables are associated with them? Accordingly, the present study evaluated the association between aquatic plant assemblages and some environmental variables, with emphasis on the spatial distance among assemblages. The study results indicated no association between the similarity of the assemblages and the spatial distances between them. The environmental variables most associated with the assemblages were the total phosphorus and nitrate concentrations. It was concluded that, during high water-level periods, the spatial distance between aquatic plant assemblages was not a relevant factor for greater similarity among them. Rather, the total phosphorus and nitrate concentrations were the environmental factors most associated with the assemblages.
机译：水生环境易受自然水位波动的影响。这些波动反过来造成了水生环境中生物群的变化，特别是在洪泛区定居的生物群。洪水脉冲概念预测，水位的波动是小规模生物群落中马赛克形成的原因。然而，有证据表明，在高水位时期，生物组合之间的相似性增加了。在此理论背景下，本研究着重于确定组合之间的空间距离是否是高水位期间它们之间相似性的相关因素，如果不是，与它们相关的环境变量是什么？因此，本研究评估了水生植物组合与某些环境变量之间的关联，重点是组合之间的空间距离。研究结果表明组合的相似性和它们之间的空间距离之间没有关联。与组合最相关的环境变量是总磷和硝酸盐浓度。结论是，在高水位期间，水生植物组合之间的空间距离不是它们之间更大相似性的相关因素。而是，总磷和硝酸盐浓度是与组合最相关的环境因素。

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