Article

The agro-ecological zones of central Niger have been in decline since the drought of 1984. Determining the structures and diversity of current species is therefore essential for conserving and sustainably using these resources. The aim is to contribute to the sustainable exploitation of plant resources in this area. The methodology used involves conducting surveys in units according to land use types in order to determine the phytodiversity and structural parameters of the woody plants present. In fact, 43 woody species, divided into 20 families, including Mimosaceae, Caesalpiniaceae, and Capparaceae, represent nearly 50%. The structure is that of a young stand in all areas, with plant biodiversity increasing from north to south and 45% of species being rare. The regeneration rate is higher in Kantché (75%) than in Tanout (32%) and Gangara (40%), with little or no regrowth of emblematic species such as C. sinensis, F. albida, A. digitata, C. africana, D. mespiliformis, S. birrea, S. kunthianum, T. indica, V. doniana, and Z. spina-christi, which is a strong indicator and a challenge in the management of this plant diversity.