Moroccan Journal of Agricultural and Veterinary Sciences

Vol. 14 No. 1 (2026): (March 2026)
Natural Resources and Forestry

Phytodiversity of the Tarka Valley sub-watershed (Niger)

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  • kaoulé KAREMA ARY MADOU ,
  • Boubacar MOUSSA MAMOUDOU,
  • Abdourhimou AMADOU ISSOUFOU,
  • Ali MAHAMANE
kaoulé KAREMA ARY MADOU Faculté de Sciences Agronomiques et Ecologiques, Université de Diffa, Niger
Boubacar MOUSSA MAMOUDOU Faculté de Sciences Agronomiques et Ecologiques, Université de Diffa, Niger
Abdourhimou AMADOU ISSOUFOU Faculté de Sciences Agronomiques et Ecologiques, Université de Diffa, Niger
Ali MAHAMANE Faculté des sciences et technologies, Université Abdou Moumouni de Niamey, Niger

Published 2026-01-11

Keywords

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Abstract

In the Sahel, vegetation is a vital resource for rural populations, but it is subject to strong anthropogenic pressure and the effects of climatic aridification. This study, conducted in the Tarka Valley sub-watershed (Belbedji department, Niger), aims to characterize the floristic composition and structure of the vegetation. Phytosociological surveys and dendrometric measurements were carried out using stratified random sampling. A matrix of 41 surveys made it possible to identify several 4 plant groups. A total of 48 species belonging to 21 families were recorded, with a predominance of Poaceae (13 species). Therophytes, phanerophytes and hydrophytes are the most represented biological types. The dominant phytogeographic affinities are the Guinean-Congolese-Sudanese-Zambesian (68.2%) and Sudanese-Zambesian-Saharan-Sindian (77.1%) species. Shannon diversity indices are higher in the G3 and G4 groups. Structural analysis reveals a high vulnerability of some ecologically important species. The results highlight the urgency of adopting sustainable management strategies to preserve local biodiversity.

Keywords: Density, Plant grouping, Structure, Belbedji, Niger

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References