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Les differents milieux ecologiques, identifies a l\'interieur de la foret classee de la Tene (Cote d\'Ivoire), et dans ses environs, ont permis d\'analyser les differents changements qui s\'operent dans la flore originelle sous l\'action des activites humaines. Le dispositif utilise a consiste en une grille carree de 2 km de cote a l\'interieur de laquelle des layons de direction Est-Ouest ont ete ouverts a equidistance de 200 m. A la memeequidistance, des placettes rectangulaires (20 m x 10 m) ont ete egalement installees le long des layons. Ces placettes, qui se repartissent diversement dans les types d\'occupation a l\'interieur de la « grille », ont ete inventoriees. Les donnees issus d\'echantillon de 45 placettes ont permis de dresser la liste des taxons composant chaque milieu ecologique et d\'evaluer la richesse specifique de la grille. Au total, 374 taxons ont ete recenses. Parmi eux, 39 taxons dont 5 endemiques de l\'Afrique de l\'Ouest, ont ete exclusivementrencontres en forets naturelles avec 71 especes pionnieres. Ces taxons se repartissent entre 276 genres et 76 familles de plantes vasculaires. Alors qu\'on observe un enrichissement progressif des especes forestieres dans les plantations forestieres de plus en plus âgees, on assiste plutot a une disparition progressive de ces especes forestieres dans les cultures lorsque l\'âge augmente. Different vegetation types identified in Tene classified forest (Cote d\'Ivoire), and vicinity allowed for analysising the different changes that occur in the original flora under human pressure. A square-grid system of 2 km sides with lines running in the East-West direction at 200 m intervals. With same the spacing,rectangular subplots (20 m X 10 m) were also installed along the lines . The subplots were distributed through the whole «gridb system» in ecological types. All the subplots were inventoried. Data collected from a sample of 45 subplots allowed for drawing a list from each ecological zone. All vascular plants inside each subplot were listed in order to evaluate their richness . Three hundred seventy four species of which 39 were 5 endemicspecies from West Africa were found only in natural forest ; and 71 species linked to human activities. These species represented 276 genera and 76 families of vascular plants. Whereas more forest species, with increasing plant age of the forest plantations, one rather expect the progressive disappearance of these forest species. Keywords : Transformation de la flore, diversite floristique, foret classee de la Tene, Cote d'Ivoire Agronomie Africaine Vol. 20 (1) 2008: pp. 1-11

Transformations de la flore d\'une forêt dense sémi décidue : impact des activités humaines (Centre Ouest de la Côte d\'Ivoire)