Authors : K. Mesli , M. Bouazza and M. Godron
Abstract: To study in all the vegetations of the mounts. Tlemcen and their facies of degradation we carried out 490 phytoecological statements between 2001 and 2006 and cash 499 let us tax. The vegetation was observed on transects of 50 m where, the stratification of the vegetation, topography, the rate of covering, the dominant species, the substrate, the exposure and altitude were recorded in mixed vegetation formations, dominated or mixes some with the Aleppo pine, the Holm Oak, the Cork Oak, the Algerian Oak or the Thuja. In front of this significant mass of data we had recourse to the frequential Analysis to know what can bring to us these non-inferential and not-parametric statistical methods in the study of these groupings and their facies of degradation. We used the method of the ecological descriptions and the statistical analysis of the interspecific connections which highlighted 56 groups of species which deserve to be called coenological groups of species. We then retained 10 coenons who emphasize the main part of the ecological characters of the vegetation of the study area. The joint use of the 2 methods made it possible to know the sensitivity of the vegetation formations with respect to the medium: it proves that altitude, the substrate and the rate of covering of the vegetation are the most significant elements for the knowledge of the units of vegetation.
K. Mesli , M. Bouazza and M. Godron , 2008. Ecological Characterization of the Vegetation and its Facies of Degradation: Mounts of Tlemcen (West-Algeria). Environmental Research Journal, 2: 271-277.