Development of a benthic diatom index of biotic integrity (BD-IBI) for ecosystem health assessment of human dominant subtropical rivers, China.
Development of a benthic diatom index of biotic integrity (BD-IBI) for ecosystem health assessment of human dominant subtropical rivers, China.
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DOI：
10.1016/j.jenvman.2014.12.048
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发表时间：
2015-03
影响因子：
8.7
通讯作者：
X. Tan;Peiming Ma;S. Bunn;Quanfa Zhang
中科院分区：
文献类型：
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作者：
X. Tan;Peiming Ma;S. Bunn;Quanfa Zhang
随着人们努力解决淡水生态系统中水质下降和生物多样性丧失的问题，人们对评估水生生态系统健康的有效方法有很大的需求。本研究通过分析底栖藻类组合和水质变量，建立了基于底栖硅藻的生物完整性指数（BD-IBI），用于评价汉江上游水生环境。通过使用多元和多指标的方法，从98个候选指标中确定了4个指标——匍卧个体百分比、双食性个体百分比、多糖种类百分比和硅藻富营养化/污染指数（EPI-D），以开发BD-IBI。该指标的应用表明，在31个采样点中，11%的水质可被描述为良好，43%的水质可被描述为良好，25%的水质为中等，21%的水质较差。结果表明，汉江生态系统退化的主要原因是农业用地对养分的富集。
As efforts intensify to address the issues of declining water quality and biodiversity losses in freshwater ecosystems, there have been great demands for effective methods of evaluating aquatic ecosystem health. In this study, benthic algae assemblages and water quality variables were analyzed to develop a benthic diatom-based index of biotic integrity (BD-IBI) for assessment of the aquatic environment in the upper Han River (China). Through the use of multivariate and multimetric approaches, four metrics – % prostrate individuals, % Amphora individuals, %polysaprob species, and diatom-based eutrophication/pollution index (EPI-D) – were identified from 98 candidate metrics to develop a BD-IBI. Application of the index revealed that water quality in 11% of the 31 sampled sites could be described as excellent condition, in 43% of the sites it could be described as good condition, in 25% as moderate condition, and in 21% as poor condition. The assessment further revealed that the main reason for degradation of the Han river ecosystem was nutrient enrichment through agricultural land use.