CARACTERISATION DHYPHAENETHEBAICA(L) MART ,UNE ESPECE DONNANT LE NOM DE LA VALLEE DE GOULBI NKABA (NIGER)

In recent years, plant resources have been exploited by the population to meet their needs for human and animal food, medicine, timber, and energy wood, among other things. The objective of this study is to contribute to knowledge of the ecology of the doum palm in the Sahelian environment. The methodological approach taken is the collection of dendrometric data on woody species where the species is present. Measurements were taken of trunk diameter, total height, stem height for Hyphaene thebaica, and perpendicular diameters of the crown for all woody species. The results show that the Goulbi n\'kaba valley contains 40 woody species divided into 28 genera and 19 families. It has a low diversity of 2.5 bits and the density of H. thebaica is 33.09 trees/ha. The stand fits the theoretical Weibull distribution with the shape parameter c = 2.86, characteristic of stands with a predominance of young individuals. The number of dichotomies is higher in the [1_3] dichotomy interval throughout the study area. Similarly, the study showed that the four most ecologically important species are Hyphaene thebaica, Faidherbia albida, Bauhinia rufescens, and Balanites aegyptiaca.