Étude et inventaire floristique dans la région de Ghardaïa (cas de Berriane)

Abstract

Our work focused on the study and inventory the vegetation cover in the region of Ghardaïa, th case of the municipality of Berriane, wich ran out of three stations : Oued Belouh, Sudan valley and Wadi Al Madagh. To facilitate our study, we divised each station into sub-stations with an eva of 100 m². The inventory carried out in all stations allowed the creation of a botanical list consisting of 41 species, spread over 22 families, it is dominated by the Asteraceae family (10 species) . According to biological species, the species that were inventoried in all the stations include 25 perennial plants and 16 annual plants. We notice a large totale wealth on the level of wadi al Sudan station with 21 species, followed by Oued Ballouh station with 15 types and 13 types in Oued Al Madagh station. The distribution of thèses species remains heterogeneous from one station to another, and from one biological environnement another. This is due to three lain factors : water, temperature and light. Whene these factors are sufficiently fulfilled, the vegetation reaches its full growth. The North Desert characterized by the sindhi desert species as well as the mediterranean species compared to other biogeographical elements. This is consistent with our study, where we scored 27% and 24% respectively of the spontaneous plants that have been inventoried.