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Alhou 1 , Y. Issiaka 2 , A. Awaiss 3 et J. Micha 4. The biological approach, based on the distribution of macroinvertebrate communities along the River Niger in Niamey, allows a good characterization of biological sampling stations.

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Alhou 1 , Y. Issiaka 2 , A. Awaiss 3 et J. Micha 4. The biological approach, based on the distribution of macroinvertebrate communities along the River Niger in Niamey, allows a good characterization of biological sampling stations.

Macroinvertebrate sampling at each of these stations is done through kicknet, the artificial substrates and water hyacinth. This approach shows the evolution of the taxonomic richness and diversity along the stations. Thus, the taxonomic richness and diversity decrease upstream to downstream discharge points.

Reference stations and stations downstream have more diversity compared to stations immediately downstream waste water discharge.

It appears from the ordination of taxa that stations upstream and downstream discharges are far less polluted and contain taxa that are sensitive to pollution as Thraulus sp. Elassoneuria sp. Stations immediately downstream of the brewery and slaughter seem to be more polluted with the presence of taxa such as Chironomus gr.

The change in the taxonomic community, diversity index of Shannon-Weaver and taxa abundance are indicators of a change in water quality and habitat from upstream to downstream of the discharge points of the city of Niamey. Data correspond to usage on the plateform after The current usage metrics is available hours after online publication and is updated daily on week days. Open Access. Current usage metrics About article metrics Return to article. Initial download of the metrics may take a while.

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We'd like to understand how you use our websites in order to improve them. Register your interest. Air quality monitoring is currently ensured by captors measuring few physicochemical parameters, then they cannot evaluate unforeseen compounds and the interaction effects of pollutants. On the contrary, the use of bioindicators can answer these problems. Among them, plants are used in two ways:. Moreover, techniques based on biomarkers identification should increase the answer's sensitivity.

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