Hierarchization of anthropic pollution and polluosensibility of groups of benthic macroinvertebrates in the watercourses of Mvila (Southern region of Cameroon)
1 Laboratory of Hydrobiology and Environment (LHE), Department of Animal Biology and Physiology, Faculty of Sciences, University of Yaounde I, BP 812 Yaounde. Cameroon.
2 Zoology Laboratory (LZ), Department of Animal Biology and Physiology Faculty of Sciences, University of Yaounde I.
Research Article
World Journal of Advanced Research and Reviews, 2024, 22(03), 1497–1508
Article DOI: 10.30574/wjarr.2024.22.3.1832
Publication history:
Received on 14 March 2024; revised on 18 June 2024; accepted on 21 June 2024
Abstract:
For five months, a study was carried out in the Mvila department (Southern Cameroon region), it's objective was to evaluate the pollution sensitivity of benthic macroinvertebrates in three stations in crenal zones and at different degrees of anthropization. For this, two methods were associated, one consisting of taking samples and analyzing the water, was carried out following the techniques recommended and the other involved capturing the organisms, their counts and identifications, was carried out according to standard methods. The average values of conductivity and pH showed significant differences only in the urban station. The Shannon and Piélou indices were higher in the peri-urban station and finally the frequencies of occurrence, correlations and relative abundances revealed that within the same order, certain species are more polluosensitive than others. Indeed, on a spatial level the species: Phyllomacromia sp; Ranastra linearis; Potadoma sp and Macrobrachium sp prefer forest watercourses, then the species Lestinogomphus sp and Caridina africana prefer peri-urban environments and finally the species. Laccotrephes sp, Melanoides tubeculata sp prefer urban waterways.
Keywords:
Macroinvertebrates; Bio sensibility; Water quality; Watercourses; urbanization
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