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Spatiotemporal changes in diatom ecological profiles: implications for biomonitoring

机译：硅藻生态分布的时空变化：对生物监测的意义

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摘要

Diatom indices developed in certain geographic regions are frequently used elsewhere, despite the strong evidence that such metrics are less useful when applied in regions other than that where species–environment relationships were originally assessed, showing that species have particular autoecological requirements in different geographic areas. In this study, we define the ecological profiles for selected environmental variables in three common epilithic diatom species in the Duero Basin (NW Spain), comparing our results with data gathered from different geographic regions. We assess differences in autoecological parameters obtained from the northern and southern subbasins, and from different years, in order to observe whether significant small-scale, spatiotemporal changes exist. Our results show that there are variations in species’ autoecological parameters between different regions. Furthermore, there are significant changes comparing northern and southern Duero subbasins for certain species and physiochemical variables. Additionally, different autoecologies have been observed for certain diatoms and environmental factors comparing two different years. It can be concluded that freshwater diatom autoecologies can vary between different geographic areas. This implies that, in order to improve water-quality bioassessments, autoecology-based diatom metrics should be developed by quantifying species distributions along environmental gradients, using datasets representative of the areas or river types where the metrics will be applied.
机译：在某些地理区域开发的硅藻指数经常在其他地方使用，尽管有力的证据表明，这些度量标准在最初评估物种与环境关系的区域以外的区域使用时效用较低，这表明物种在不同地理区域具有特殊的自生态学要求。在这项研究中，我们将我们的结果与从不同地理区域收集的数据进行比较，从而确定了杜罗盆地（西班牙西北部）的三种常见上石器硅藻物种中选定环境变量的生态概况。为了评估是否存在明显的小规模，时空变化，我们评估了从北部和南部子流域以及不同年份获得的自生态参数的差异。我们的结果表明，不同地区之间物种的自生态参数存在差异。此外，在某些物种和理化变量方面，比较北部和南部杜罗次流域也有重大变化。此外，与两年不同的结果相比，某些硅藻和环境因素也观察到了不同的自生态性。可以得出结论，淡水硅藻的自生态学在不同的地理区域之间会有所不同。这意味着，为了改善水质生物评估，应通过使用代表将应用度量的地区或河流类型的数据集来量化沿环境梯度的物种分布，从而开发基于自生态学的硅藻度量。

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  • 来源
    《Limnology》 |2011年第2期|p.157-168|共12页
  • 作者

    Irene Álvarez-Blanco; Cristina Cejudo-Figueiras; Eloy Bécares; Saúl Blanco;

  • 作者单位

    Department of Biodiversity and Environmental Management, University of León, 24071, León, Spain;

    Department of Biodiversity and Environmental Management, University of León, 24071, León, Spain;

    Department of Biodiversity and Environmental Management, University of León, 24071, León, Spain;

    Department of Biodiversity and Environmental Management, University of León, 24071, León, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Autoecology; Response curves; Bioindicators; Ecological indices;

    机译：自生态;响应曲线;生物指标;生态指标;

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