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International Journal of Zoology and Applied Biosciences Research Article
Diversity of benthic macroinvertebrates in the tile river in the forested region of Guinea
Zinsou Hermann Léonce, Djidohokpin Gildas, Adandé Richard, Keita Nouhan, Bilivogui Papa, Gnohossou Pierre
Year : 2026 | Volume: 11 | Issue: 2 | Pages: 180-188
Received on: 09/12/2025
Revised on: 22/01/2026
Accepted on: 19/02/2026
Published on: 01/03/2026
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Zinsou Hermann Léonce, Djidohokpin Gildas, Adandé Richard, Keita Nouhan, Bilivogui Papa, Gnohossou Pierre( 2026).
Diversity of benthic macroinvertebrates in the tile river in the forested region of Guinea
. International Journal of Zoology and Applied Biosciences, 11( 2), 180-188.
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Abstract
Benthic macroinvertebrate communities, widely recognized as excellent biological indicators, are commonly used to assess the ecological status of freshwater ecosystems. The objective of this study is to describe the structure of the benthic fauna of the Tilé River, located in the forested region of Guinea. To this end, bimonthly sampling was conducted from April to November 2025 at five stations distributed from upstream to downstream, using a Surber-type sampling net. The collected samples were sorted, identified, and counted under a stereomicroscope. In total, 1,788 benthic macroinvertebrate individuals belonging to 3 classes, 12 orders, and 22 genera were recorded. Faunal analysis revealed a clear dominance of insects, which accounted for 86.36% of the total abundance, mainly from the Diptera, Ephemeroptera, and Coleoptera orders. Fisher’s test, applied to analyze spatial variations in taxon distribution among stations, showed no significant differences in abundance (F = 0.48; p-value = 0.75 > 0.05). Furthermore, the evaluation of ecological parameters including species richness (mean SR = 18), Shannon diversity index (H' = 2.14 bits), Pielou’s evenness index (J’= 0.77), trophic structure, and the proportion of EPT taxa (Ephemeroptera-Plecoptera-Trichoptera), indicated an increasing imbalance in macroinvertebrate communities from upstream to downstream, reflected by generally low index values. These preliminary results constitute an essential baseline for future bioindication studies, aimed at preserving the ecological integrity of the Tilé River and ultimately contributing to the protection of public health in surrounding communities.
Keywords
Diversity, Benthic macroinvertebrates, Water quality, Tilé River, Guinea.
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© The Author(s) 2025. This article is published by International Journal of Zoology and Applied Biosciences under the terms of the Creative Commons Attribution 4.0 International License (creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
