Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé)
In Cameroon, the environmental profile is increasingly marked by anarchic urbanisation, which is strongly illustrated by the discharge of waste into the aquatic environment, leading to pollution. Indeed, the tributaries of the Mfoundi and Mefou river basins have nowadays become dumping grounds and r...
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MDPI AG
2023-06-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/13/2383 |
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| author | Marie Anita Temgoua Zemo Samuel Foto Menbohan Bernard Tossou Atchrimi Wilfreid Christiane Noel Betsi Mathias Nwaha Jean Dzavi Célestin Adeito Mavunda Nathaniel Lactio |
| author_facet | Marie Anita Temgoua Zemo Samuel Foto Menbohan Bernard Tossou Atchrimi Wilfreid Christiane Noel Betsi Mathias Nwaha Jean Dzavi Célestin Adeito Mavunda Nathaniel Lactio |
| author_sort | Marie Anita Temgoua Zemo |
| collection | DOAJ |
| description | In Cameroon, the environmental profile is increasingly marked by anarchic urbanisation, which is strongly illustrated by the discharge of waste into the aquatic environment, leading to pollution. Indeed, the tributaries of the Mfoundi and Mefou river basins have nowadays become dumping grounds and receptacles for all kinds of waste, leading to the degradation of water quality and a reduction in biodiversity. This study aims to evaluate the effect of anthropogenic pressure on the biodiversity of benthic macroinvertebrates in three rivers of the Mfoundi basin (Ebogo, Abiergue, and Ako’o). For this purpose, some physicochemical parameters were measured according to standard methods, and benthic macroinvertebrates were collected according to the multihabitat approach. To this end, the physicochemical analyses revealed that the waters of these different streams are slightly basic and poorly oxygenated, with a saturation rate of 9.725 ± 11.74% and significant organic pollution. Biologically, a total of 5793 benthic macroinvertebrates divided into three phyla, eight orders, and more than thirty families were collected, with a population dominated by the order of insects and a low level of diversity dominated by pollutant organisms such as the Chironomidae, Lumbriculidae, and Physidae, which are saprobionts and saprophilous organisms. A redundancy analysis indicated that the main groups of benthic macroinvertebrates obtained were related to the gradients of the physicochemical parameters measured. The Shannon–Weaver diversity and Piélou equitability indexes showed the low diversity of the organisms within the different courses and their low equipartition, mainly due to the saprobiont and saprophilous groups that dominate the population. The exogenous inputs due to the increase in the population of the city of Yaoundé, which dumps its waste into the waterways, have major repercussions on the quality of the water and the population that abounds in this environment, particularly the benthic macroinvertebrates, which are an important link in the monitoring of water quality. |
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| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T01:25:57Z |
| publishDate | 2023-06-01 |
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| spelling | doaj.art-e6aad939709f419cbace8a2e5d5b90f02023-11-18T17:47:24ZengMDPI AGWater2073-44412023-06-011513238310.3390/w15132383Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé)Marie Anita Temgoua Zemo0Samuel Foto Menbohan1Bernard Tossou Atchrimi2Wilfreid Christiane Noel Betsi3Mathias Nwaha4Jean Dzavi5Célestin Adeito Mavunda6Nathaniel Lactio7Centre d’Excellence Régional sur les Villes Durables en Afrique (CERViDA-DOUNEDON), University of Lomé, Lomé 01BP 1515, TogoLaboratory of Hydrobiology and Environment, Faculty of Science, University of Yaoundé 1, Yaounde P.O. Box 812, CameroonCentre d’Excellence Régional sur les Villes Durables en Afrique (CERViDA-DOUNEDON), University of Lomé, Lomé 01BP 1515, TogoLaboratory of Hydrobiology and Environment, Faculty of Science, University of Yaoundé 1, Yaounde P.O. Box 812, CameroonLaboratory of Hydrobiology and Environment, Faculty of Science, University of Yaoundé 1, Yaounde P.O. Box 812, CameroonLaboratory of Hydrobiology and Environment, Faculty of Science, University of Yaoundé 1, Yaounde P.O. Box 812, CameroonCentre d’Excellence Régional sur les Villes Durables en Afrique (CERViDA-DOUNEDON), University of Lomé, Lomé 01BP 1515, TogoLaboratory of Hydrobiology and Environment, Faculty of Science, University of Yaoundé 1, Yaounde P.O. Box 812, CameroonIn Cameroon, the environmental profile is increasingly marked by anarchic urbanisation, which is strongly illustrated by the discharge of waste into the aquatic environment, leading to pollution. Indeed, the tributaries of the Mfoundi and Mefou river basins have nowadays become dumping grounds and receptacles for all kinds of waste, leading to the degradation of water quality and a reduction in biodiversity. This study aims to evaluate the effect of anthropogenic pressure on the biodiversity of benthic macroinvertebrates in three rivers of the Mfoundi basin (Ebogo, Abiergue, and Ako’o). For this purpose, some physicochemical parameters were measured according to standard methods, and benthic macroinvertebrates were collected according to the multihabitat approach. To this end, the physicochemical analyses revealed that the waters of these different streams are slightly basic and poorly oxygenated, with a saturation rate of 9.725 ± 11.74% and significant organic pollution. Biologically, a total of 5793 benthic macroinvertebrates divided into three phyla, eight orders, and more than thirty families were collected, with a population dominated by the order of insects and a low level of diversity dominated by pollutant organisms such as the Chironomidae, Lumbriculidae, and Physidae, which are saprobionts and saprophilous organisms. A redundancy analysis indicated that the main groups of benthic macroinvertebrates obtained were related to the gradients of the physicochemical parameters measured. The Shannon–Weaver diversity and Piélou equitability indexes showed the low diversity of the organisms within the different courses and their low equipartition, mainly due to the saprobiont and saprophilous groups that dominate the population. The exogenous inputs due to the increase in the population of the city of Yaoundé, which dumps its waste into the waterways, have major repercussions on the quality of the water and the population that abounds in this environment, particularly the benthic macroinvertebrates, which are an important link in the monitoring of water quality.https://www.mdpi.com/2073-4441/15/13/2383benthic macroinvertebratespollutionanarchic urbanisation |
| spellingShingle | Marie Anita Temgoua Zemo Samuel Foto Menbohan Bernard Tossou Atchrimi Wilfreid Christiane Noel Betsi Mathias Nwaha Jean Dzavi Célestin Adeito Mavunda Nathaniel Lactio Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé) Water benthic macroinvertebrates pollution anarchic urbanisation |
| title | Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé) |
| title_full | Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé) |
| title_fullStr | Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé) |
| title_full_unstemmed | Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé) |
| title_short | Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé) |
| title_sort | effect of anthropogenic pressure on the biodiversity of benthic macroinvertebrates in some urban rivers yaounde |
| topic | benthic macroinvertebrates pollution anarchic urbanisation |
| url | https://www.mdpi.com/2073-4441/15/13/2383 |
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