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Online ISSN : 2349-8080 Issues : 12 per year Publisher : Excellent Publishers Email : editorinchiefijcrbp@gmail.com |
2Institute of Agricultural Research for Development, PO. BOX: 2123 Yaounde, Cameroon
3Departement of Plant Biology, Laboratory of Microbiology of Soils, Faculty of Science, PO. BOX: 812, University of Yaounde I, Cameroon
4Departement of Plant Biology, Laboratory of Biotechnology & Environment, Faculty of Science, PO. BOX: 812, University of Yaounde I, Cameroon
5Institute of Agricultural Research for Development, CEREPAH Dibamba, PO. BOX: 243 Douala, Cameroon
The Mfoundi watershed serves as a collector of untreated sewage in the Yaounde urban area. This study on the floristic diversity of this ecosystem was conducted with the objective of determining the influence of water pollution on the distribution of the subservient macrophytes. The inventory based on floristic records from Braun-Blanquet abundance-dominance coefficients was carried out in 90 plots of 5 m x 5 m distributed over 9 stations belonging to 3 tributaries (Aké, Biyeme, Ewoué) chosen on the basis of the effluents they receive. The R version 3.3.3 software was used to analyze the data. The Shannon diversity index, which ranges from 2.64 to 3.32, is indicative of a richness of floristic diversity in the Mfoundi lowlands. However, they are dominated by Pennisetum purpureum Schumach. (14.9%), Commelina benghalensis L. (9.3%) and Echinochloa pyramidalis (Lam.) Hitchc. & Chase (8.4 %). On each tributary studied, Ipomoea aquatica Forsk. abundantly appears at the intermediate level and disappears downstream. Other abundant species (Hydrolea glabra Schumach & Thonn, Leersia hexandra Sw. and Pistia stratiotes L.) have a fortuitous and evanescent appearance, approaching the above-mentioned specie but subservient only to the Aké tributary. These abundant species can give an indication of the quality of the water and guide the ecological restoration of degraded environments.
