1 Laboratory of Hydrobiology and Environment, Faculty of Science, University of Yaoundé I, P.O. BOX 812, Yaoundé, Cameroon.
2 Hydrological Research Centre, Institute of Geological and Mining Research, Yaoundé. Cameroon.
3 Laboratory of Hydrobiology and Ichthyology, Institute of Agronomic and Forestery Research, P.O.Box: 2246 Libreville, Gabon.
Research Article
World Journal of Advanced Research and Reviews, 2023, 19(01), 254-264
Article DOI: 10.30574/wjarr.2023.19.1.0934
Received on 10 April 2023; revised on 01 July 2023; accepted on 04 July 2023
In order to determine the structure of benthic macroinvertebrates fauna in relation with some environmental factors, a study was carried out in the Esoa river at Nkongsamba in the Littoral region of Cameroon from January 2021 to January 2022. Physico-chemical parameters were measured according to APHA and Rodier recommendations, while benthic macroinvertebrates sampling was done out according to the multihabitat approach at a monthly frequency. The physico-chemical analyses revealed very good oxygenation of the water, a tendency of neutrality for the pH (7.79±0.8 UC) and a low and constant temperature (22.61±1.83 °C). The BMI count showed 3732 individuals, including 4 phyla, 6 classes, 14 orders and 69 families and over 80 species. Besides, the class of insects, and in particular the order of Odonata, supplanted the benthic fauna. The Esoa 2 and Esoa 3 stations recorded the highest relative abundance of BMI (37.43% and 36.99% respectively) with a predominance of pollutant taxa, notably the families of Chironomidae, Physidae, Tubificidae and Lumbricidae. On the other hand, the Esoa 1 station, with low relative abundance (25.56%), was more diversified and dominated by polluosensitive taxa, including Ephemeroptera, Plecoptera and Trichoptera. The high values of the Sӧrensen similarity index (65.62%) showed a high faunal similarity of the Esoa 2 and Esoa 3 stations. The high values of the Shannon and Weaver diversity index (4.6 bits/ind) indicated a high diversity of benthic macroinvertebrates reflecting the good ecological status of the waters of the Esoa stream.
Benthic macroinvertebrates; Diversity; Water quality; Esoa river
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Wilfreid Christiane Noel Betsi, Samuel Foto Menbohan, Nathaniel Larry Lactio, Yvonne Laure Tchouapi, Marie Anita Zemo Temgoua, Donald L’or Nyame Mbia, Serge Roger Gwos Nhiomock, Mathias Nwaha, Eric Belmond Biram A Ngon, Jean Dzavi, Blaise Rollinat Mboyé and Moïse Nola. Comparative approach of the fauna diversity of benthic macroinvertebrates in a stream on ferralitic soil and equatorial climate at 2 seasons in Cameroon (Central Africa). World Journal of Advanced Research and Reviews, 2023, 19(1), 254-264. Article DOI: https://doi.org/10.30574/wjarr.2023.19.1.0934