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首页> 外文期刊>Acta Limnologica Brasiliensia >Aquatic macrophyte community varies in urban reservoirs with different degrees of eutrophication
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Aquatic macrophyte community varies in urban reservoirs with different degrees of eutrophication

机译：城市水生植物的富营养化程度不同，其水生植物群落也有所不同

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AIM: Investigate spatial and temporal variation in the aquatic macrophyte community in four urban reservoirs located in Curitiba metropolitan region, Brazil. We tested the hypothesis that aquatic macrophyte community differ among reservoirs with different degrees of eutrophication. METHODS: The reservoirs selected ranged from oligotrophic/mesotrophic to eutrophic. Sampling occurred in October 2011, January 2012 and June 2012. Twelve aquatic macrophytes stands were sampled at each reservoir. Species were identified and the relative abundance of aquatic macrophytes was estimated. Differences among reservoirs and over sampling periods were analyzed: i) through two‑way ANOVAs considering the stand extent (m) and the stand biodiversity - species richness, evenness, Shannon-Wiener index and beta diversity (species variation along the aquatic macrophyte stand); and ii) through PERMANOVA considering species composition. Indicator species that were characteristic for each reservoir were also identified. RESULTS: The aquatic macrophyte stand extent varied among reservoirs and over sampling periods. Species richness showed only temporal variation. On the other hand, evenness and Shannon-Wiener index varied only among reservoirs. The beta diversity of macrophyte stands did not vary among reservoirs or over time, meaning that species variability among aquatic macrophyte stands was independent of the stand extent and reservoir eutrophication. Community composition depended on the reservoir and sampling period. CONCLUSIONS: Our results support our initial expectation that reservoirs of different degrees of eutrophication have different aquatic macrophyte communities. As a consequence, each reservoir had particular indicator species. Therefore, monitoring and management efforts must be offered for each reservoir individually.
机译：目的：调查巴西库里提巴市区的四个城市水库水生植物群落的时空变化。我们检验了富营养化程度不同的水库中水生大型植物群落不同的假设。方法：选择的储层范围从贫营养/中营养到富营养化。采样于2011年10月，2012年1月和2012年6月进行。每个水库取样了十二个水生植物。确定物种并估计水生大型植物的相对丰度。分析了水库之间和整个取样周期之间的差异：i）通过两次方差分析，考虑了林分范围（m）和林分生物多样性-物种丰富度，均匀度，Shannon-Wiener指数和β多样性（沿水生植物群落的物种差异） ; ii）通过PERMANOVA考虑物种组成。还确定了每个储层特征性的指示物种。结果：水生植物的林分范围在水库之间和整个采样期间有所不同。物种丰富度仅显示时间变化。另一方面，均匀度和香农-维纳指数仅在储层之间变化。大型水生植物群落的β多样性在水库之间或随时间没有变化，这意味着水生大型水生植物群落之间的物种变异性与林分范围和水库富营养化无关。群落组成取决于水库和采样时间。结论：我们的结果支持了我们最初的期望，即不同程度的富营养化的水库具有不同的水生植物群落。结果，每个储层都有特定的指示物种。因此，必须对每个水库分别进行监测和管理。

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