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Cross-taxon responses to elevated nutrients in European streams and lakes

机译:跨类群对欧洲河流和湖泊中营养增加的反应

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摘要

Few studies have compared the response of different taxonomic groups to environmental stress across aquatic ecosystems. We regressed assemblage structure of fish, invertebrates, macrophytes, phytoplankton and ben-thic diatoms to total phosphorus concentration, after removing the effect of ecosystem size (stream order, lake surface area), using data from 66 streams and 45 lakes across Europe. In streams, the structure of benthic diatom assemblages, measured by nonmetric multidimensional scaling, showed the strongest correlation to elevated nutrient concentrations (adj. R~2 = 0.495), followed by benthic invertebrates (0.376), fish (0.181) and macrophytes (0.153). For lakes, the patterns were less clear: fish (0.155), macrophytes (0.146) and phytoplankton (0.132). Cross-system comparison showed that stream assemblages were responding more strongly to nutrient concentrations than lake assemblages. Moreover, our results lend some support to the conjecture that response signatures are related to trophic level, with primary producers (benthic diatoms) responding more strongly than consumers (invertebrates, fish). Knowledge of differences in responses among taxonomic groups and between habitats to disturbance can be used to design more cost-effective monitoring programs.
机译:很少有研究比较水生生态系统中不同分类群对环境压力的响应。在使用了来自欧洲66个河流和45个湖泊的数据后,我们在去除了生态系统大小(河流次序,湖泊表面积)的影响之后,将鱼类,无脊椎动物,大型植物,浮游植物和本底硅藻的组合结构回归到总磷浓度。在溪流中,通过非度量多维标度测量的底栖硅藻集合体的结构显示出与养分浓度升高(调节系数R〜2 = 0.495)的相关性最强,其次是底栖无脊椎动物(0.376),鱼类(0.181)和大型植物(0.153) )。对于湖泊,模式不太清楚:鱼类(0.155),大型植物(0.146)和浮游植物(0.132)。跨系统比较显示,溪流组合对营养物浓度的响应比湖泊组合更强烈。此外,我们的研究结果为推测响应签名与营养水平相关的推测提供了一些支持,主要生产者(底生硅藻)的响应比消费者(无脊椎动物,鱼类)的响应更强烈。关于分类群之间以及生境之间对扰动的反应差异的知识可用于设计更具成本效益的监测计划。

著录项

  • 来源
    《Aquatic Sciences》 |2014年第1期|51-60|共10页
  • 作者单位

    Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07 Uppsala, Sweden;

    Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07 Uppsala, Sweden;

    Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, 0349, Oslo, Norway;

    Department of Aquatic Ecology, University of Duisburg-Essen, 45117 Essen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomonitoring; Impairment; Multiple taxonomic groups; Regression;

    机译:生物监测;减值;多个分类组;回归;

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