Abstract
Investigations on biological capacity of water quality of macroinvertebrate community are very uncommon, and such as the amount of information available on the Nokoue Lake (the largest lake of Benin) is very limited. This information gap needs to be filled for better management of the Nokoue Lake. The goal of this study was to evaluate the possibility of using the macroinvertebrate community structures in Nokoue Lake and the environmental factors responsible for the maintenance of these structures. Nokoue Lake was studied over three months, during high flood period in which time subsurface water and macroinvertebrate samples were collected and analyzed. A study showed that the macroinvertebrate assemblages was done according to ecological gradients as pH, conductivity, TDS, salinity, chlorophyll a and probably to anthropogenic actions (nutriments). Better than the percentage of insects, the percentage of Chironomidae informed very well about macroinvertebrate assemblages. To assess the biological health of the environment, the Family Biotic Index (FBI) turns out to be more appropriate than diversity indices that do not take into account the intermediate pollution. Organic pollution revealed by the FBI probably affects the aquatic life.
Highlights
The rapid increase of population in developing countries has increased the level of anthropogenic impact
The chlorophyll a concentration was higher in September but decreases in October and increases again in November (Figure 2)
Environment characteristics changing of Nokoue Lake are due to his role as ultimate natural receptor of the Oueme River, saline intrusion, local climate and human activities
Summary
The rapid increase of population in developing countries has increased the level of anthropogenic impact This is illustrated by bad agricultural practices, changing land uses, the extent of eroded surfaces and discharges of unprocessed waste water [1] [2]. This, coupled with climate change, leads to deterioration in the quality of coastal and inland surface water as lakes, ultimate natural receptor [2] [3]. This anthropogenic pollution leads to e.g. eutrophication of exposed lakes which is characterized by the proliferation of invasives such as Eichhornia crassipes [4] [5], generally most pronounced near built up human areas [6].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
