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Bacteriological and Physicochemical Quality of Groundwater of Mbankomo Municipality(Center Region,Cameroon)

Journal of Environmental Science and Engineering(B) 2023年第3期12卷 115-127页

作者： Murielle Patricia Mabou Tokam Antoine Tamsa Arfao Fils Mamert Onana Ernest Koji Vanelle Lontchi Segnou Yves Poutoum Yogne Awawou Manouore Njoya Ornel Kadji Tchantcha Ahmadou Fadimatou sylvie chinche belengfe Edith Brunelle Mouafo Tamnou Moïse Nola Department of Animal Biology and Physiology Faculty of ScienceUniversity of DoualaDouala 24157Cameroon Hydrobiology and Environment Laboratory University of Yaounde 1Faculty of SciencesYaounde 812Cameroon Laboratoire d’Application et d’Analyses Médicales Institut Supérieur des Sciences et Techniques de la Santéet du Management de GarouaBP.51 GarouaCameroun Department of Aquatic Ecosystems Management Institute of Fisheries and Aquatic SciencesUniversity of DoualaDoualaCameroon Laboratory S3MN2E Faculty of SciencesMohammed-V University RabatAv.Ibn-BattoutaRabatMorocco 8007.N.U.North Africa Department of Fisheries and Aquatic Resources Management Faculty of Agriculture and Veterinary MedicineUniversity of BueaBuéa 63Cameroon

A study to evaluate the physico-chemical and bacteriological quality of groundwater was carried out in the commune of Mbankomo(Centre-Cameroon)at 4 wells and 4 springs during the period from March to *** physico-chemical parameters were measured by the standard *** bacteria of fecal contamination,namely HAB(Heterotrophic Aerobic Bacteria),total and faecal coliforms(Escherichia coli),and faecal streptococci were isolated by the surface spreading technique on PCA(Plate Count Agar),Endo and BEA(Bile Esculin Azide)agar respectively,and sulphite-reducing clostridia by the incorporation method on Tryptone Sulfite Cycloserine(TSC)*** a physico-chemical point of view,the groundwater in Mbamkomo is characterized by an average temperature(24.24±0.24°C);it is polluted with organic matter,acid and poorly *** was noted from a bacteriological point of view that these waters have a high and varied bacterial load with an average value of 100.8 × 10^(5) CFU/100 mL for coliforms,16.3 × 10^(5) CFU/100 mL for fecal streptococci,5.6 × 10^(5) CFU/100 mL for Escherichia coli and 4.8 ×10^(²)CFU/100 mL for Clostridium *** concentrations are all higher than the WHO(World Health Organization)standards which are set at 0 CFU/100 mL for coliforms,fecal streptococci and Clostridium perfringens and indicate fecal pollution of these *** coli cell densities were significantly correlated with dissolved oxygen in the water(r=0.510;p<0.05).The degradation of the quality of these waters is favored by their proximity to pollution sources,poor maintenance and poor protection of the *** waters,without any treatment,are not recommended for human consumption according to the standards of the WHO.

关键词： Groundwater physico-chemical quality bacteriological quality.

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Inventory and Distribution of Benthic Macroinvertebrates, Indicators of Water Quality in Four Forested Watercourses in Centre Region of Cameroon

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Open Journal of Ecology 2024年第4期14卷 381-394页

作者： Eric B. Biram à Ngon sylvie B. chinche Josephine Ndjama Jean Dzavi Donald L. Nyame Mbia Mathias Nwaha Serge R. Gwos Nhiomock Blaise R. Mboye Ivone L. Tchaouapi Ulrich Tchouta Chamberline Ngalamou Samuel Foto Menbohan Research Centre for Water and Climate Change Institute of Geological and Mining Research Yaound&#233 Cameroon Department of Fisheries and Aquatic Resources Management Buea Cameroon Laboratory of Hydrobiology and Environment University of Yaound&#233 Yaound&#233 Cameroon Laboratory of Hydrobiology and Ichthyology Libreville Gabon

The inventory of benthic macroinvertebrate species was carried out in some streams of the Mefou catchment area, from August 2021 to August 2022, in order to determine the biological groups that make up the population and characterise these environments. The dataset acquired during this study made it possible to update the existing database and contribute to the knowledge of the biological groups associated in these environments, and to provide additional information on the existing ones in relation to bioindication. Overall 80 families were identified and, on the basis of frequencies of occurrence greater than 75%, 22 families were retained as potential biological indicators. The remarkable diversity of insects and the low abundance of Diptera reflect the low degradation of environments and the good quality of water. The high diversity indices obtained reflect the maintenance of the favourable ecological conditions that favours the development of a balanced and, integrated biological community capable of adapting to changes.

关键词： Benthic Macroinvertebrates Bioindicators Biological Quality Forest Watercourse Cameroon

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