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[This article belongs to Volume - 57, Issue - 05]

Abstract : Wadi Soubella is a fifty km long river at the southern part of Sétif Province. It rises between the Boutaleb and Righa Dhahra mountains, forming a narrow corridor, and flows into the Chott El Hodna, one of the RAMSAR wetlands of Algeria. The study area is characterized by its faunistic, floristic, bioclimatic and landscape diversity, but it faces the threats of intensive drought as well as the construction of a new 17.4 hm3 dam to be installed on the wadi. The aim of the study is to characterize and classify the region's vegetation before the dam brings about environmental changes. Field work based on phytosociological surveys enabled the classification of the vegetation into natural habitats distributed and represented along the wadi. 102 species belonging to 39 families and 91 were recorded and assigned abundance-dominance and sociability coefficients (Braun-Blanquet sacle). The richest families were Asteraceae, Poaceae, Fabaceae and Lamiaceae. Based on field survey and phytosociological classification of Braun-Blanquet and O. de Bolos (1957) two main habitat types are PHRAGMITAIE and NERIO-TAMARICAIS. The second class groups three underclasses: NERIAIE, NERIAIE-TAMARICAIE and TAMARICAIE.