Détails de la publication

Effect of drying on the diversity of benthic macroinvertebrates in tributary streams of the Sota River in North-Eastern Bénin

Détails de la publication

• Type:Article
• Domaine: Ressources naturelles et Environnement
• Année de publication: 2022
• Auteurs: Z. Orou Piami, H. Akodogbo, M. P. Gnohossou, K. S. Abahi, H. S. Sanni Worogo
• Cultures: benthic macroinvertebrates
• Couverture géographique: Bénin
• Mots clés: benthic macroinvertebrates, drying, effect, Sota, Bénin.

Résumé de la publication

In northern Benin, the tributaries of the Sota River are subject to severe droughts, but little is known on how the aquatic fauna reacts to these environmental changes. The study aimed to assess the impact of drying on the diversity of benthic macroinvertebrates of the three streams (Bouli, Irané and Tassiné) tributaries of the Sota River. Data on biological and physico-chemical parameters were collected before and after drying. The results revealed that 55 families were collected before the drying up while 50 families were recorded after the drying up of the study stations. The taxonomic richness revealed 24.96% of Insects, 0.10% Crustaceans, 1.10% Molluscs, 0.81% of Worms and 0.16% of Hydracariens were recorded before drying while 20.22% of Insects, 0.22% Crustaceans, 1.06% Molluscs, 11.40% Worms and 0.16% Hydracarians were recorded after drying. The high values of the Shannon and Piélou diversity indices and the high values of the taxonomic richness recorded before the drying reflect the effects of the drying on the benthic communities of the Sota. The high density of Worms and Molluscs after drying is characteristic of their ability to recolonize and resist drought.