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A multimetric index for assessment of aquatic ecosystem health based on macroinvertebrates for the Zio river basin in Togo

机译：基于多河流域的大型脊椎动物基于大河流域水生生态系统健康的多功能指标

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摘要

The use of multimetric indices as tools for assessing aquatic ecosystem health in most of the developing countries such as Togo is still lacking. To fill this gap, we developed a macroinvertebrates-based multimetric index for the Zio river basin of Togo. Forty-two sites were assessed for the development and the validation of the Multimetric Index of Zio River Basin (MMIZB). Thirty-nine candidate metrics belonging to four categories (composition metrics, functional feeding metrics, diversity metrics and tolerance measure metrics) were evaluated. After comprehensive multiple selection procedure, six core metrics were retained to provide the final MMIZB. The results showed that the MMIZB responded to a set of organic pollution (chemical oxygen demand, ammonium, total suspended solid) and hydromorphological alterations, which corresponded to a set of gradients of human pressures affecting the ecological integrity of Zio river basin water bodies (r = 0.78, p < 0.001). The final macroinvertebrate index well distinguished the reference sites and impaired sites of a validation data set (p < 0.001) and showed a significant relationship between water and habitat quality based on Prati's index (r = 0.73, p < 0.001) and Multimetric Macroinvertebrates Index of Vietnam (MMI_Vietnam) (r = 0.88, p < 0.001). This work underlines the relevance of the MMIZB as an effective tool for biological monitoring and decision making in water management of Zio river basin.
机译：在大多数发展中国家（如多哥）中仍然缺乏，使用多仪单作为评估水生生态系统健康的工具。为了填补这种差距，我们为多哥的Zio River河流域开发了一种基于Macroinvertebrats的多功能指数。评估四十二站点的发展和ZIO River盆地（MMIZB）的多仪指数的验证。评估属于四类的三十九个候选度量（构图度量，功能送料指标，分集度量和公差测量度量）。经过全面多选择程序后，保留了六个核心度量以提供最终MMIZB。结果表明，MMIZB响应了一组有机污染（化学需氧，铵，总悬浮固体）和水形式改变，其对应于影响Zio河流域水体生态完整性的人类压力梯度（R. = 0.78，p <0.001）。最终的Macroinvertebrete指数很好地区分了参考网站和验证数据集的受损地点（P <0.001），并在PRATI指数（r = 0.73，P <0.001）和多算法的大型近似术指数之间显示出水和栖息地质量之间的显着关系越南（MMI_VIETNAM）（r = 0.88，p <0.001）。该工作强调了MMIZB作为ZIO River盆地水管理中的生物监测和决策的有效工具。

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