Vincent Andreu-Boussut

• Biodiversity Journal, 14 (1): 0173-0184

  Bariza Gourari, Nacira Boulaacheb, Vincent Andreu-Boussut & Badr Eddine Belkhodja
  Floristic and phytogeographic study of the vegetation of Djebel Médjounes (Setifian High Plains, Algeria)
  https://doi.org/10.31396/Biodiv.Jour.2023.14.1.173.184

  ABSTRACT
  The floristic and phytogeographical study of the pre-forest vegetation of Djebel Médjounes allowed for the evaluation of the floristic dynamics under anthropogenic and natural pressures due to climate change. Of the 237 phytosociological surveys, 420 taxa belonging to 53 families and 226 genera were recorded. The floristic composition reveals 186 Therophytes (45.03%), 133 Hemicryptophytes (32.20%), 33 Geophytes (8%), 40 Chameophytes (9.68%), 19 Nanophanerophytes (4.84%), and 2 Microphanerophytes, or 0.24%of the floristic cohort. The best represented families in terms of genera and species are Asteraceae (73 species, 17.33%) and Poaceae (55 species, 13.06%). The rest of the families have less than 50 species: Fabaceae (26 species, 11.16%), Brassicaceae (25 species, 5.93%), Lamiaceae (24 species, 5.7%), Caryophyllaceae (18 species, 4.27%), Boraginaceae (17 species, 4.03%), Apiaceae (13 species, 3.08%), Cistaceae and Crassulaceae (12 species, 2.85%), Ranunculaceae (10 species, 2.37%). From a phytogeographical perspective, the Mediterranean element is relatively predominant with 244 species (85.37%), of which 37 endemic species were inventoried. The identified floristic diversity component is induced by strong anthropogenic pressure (overgrazing, fires, exploitation) in addition to a regression of precipitation.

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