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La comprehension de la dynamique des especes dans les Chantiers d’Amenagement Forestiers (CAF) est primordiale pour leur conservation durable. L’objectif de cette etude est d’evaluer l’effet de l’anthropisation sur la dynamique de quatre especes utilitaires (Vitellaria paradoxa, Burkea africana, Crossopteryx febrifuga et Detarium microcarpum) dans le CAF de Cassou. Pour ce faire, un inventaire dendrometrique a ete realise par la methode d’echantillonnage de Whittaker dans les Unites d’Amenagement Forestiers (UAFs) 1, 6, 8 et 9 ou les incidences des activites agricoles, de la coupe de bois, du pâturage et des feux tardifs ont ete evaluees. Les resultats montrent qu’en dehors des activites agricoles qui ont ete moins frequentes, les UAFs ont ete tres touchees par le feu (> 55%), la coupe de bois (> 60%) et le pâturage (> 85%). L’analyse structurale des especes indique des densites plus elevees dans les UAFs 1 et 8. Seul Detarium microcarpum presente une structure stable dans toutes les UAFs tout comme Vitellaria paradoxa dans les UAFs 1, 6 et 8. A part Detarium microcarpum, les trois autres especes ont des difficultes de regeneration. La mise en œuvre d’un programme de conservation de ces especes dans le CAF est donc necessaire pour proteger et faciliter la croissance de leurs juveniles. Mots cles : Facteurs anthropiques, amenagement forestier, diversite structurale, Burkina Faso. English Title:Effect of anthropogenic factors on the structure and dynamics of four useful species in the forest management domains (FMD) of Cassou (Burkina Faso) Understanding the structural dynamics of woody species in the Forest Management Centre (FMC) is necessary for their sustainable conservation. The aim of this study is to assess the effect of anthropogenic factors on the dynamics of four useful species (Vitellaria paradoxa, Burkea africana, Crossopteryx febrifuga, Detarium microcarpum) in the FMC of Cassou. To this end, dendrometric measures using the Whittaker sampling method were carried out in the Forest Management Units (FMUs) 1, 6, 8 and 9, in which anthropogenic factors such as practice of agriculture, logging, grazing and fire were evaluated. The results show that apart from agricultural activities, which were relatively less frequent, the FMUs were very affected by fire (> 55%), tree cutting (> 60%) and livestock grazing (> 85%). Structural analysis of species showed higher densities in FMUs 1 and 8. Detarium microcarpum showed a stable structure in all the FMUs and Vitellaria paradoxa was only stable in the FMUs 1, 6 and 8. Except for Detarium microcarpum, the overall regeneration’ rate of the assessed species was weak. Therefore, implementation of conservation program in the FMC of Cassou is needed to protect and facilitate the growth of the juveniles of these species. Keywords : Anthropogenic factors, forest management, structural diversity, Burkina Faso.

Influence de l’anthropisation sur la structure de quatre espèces utilitaires dans le Chantier d’Aménagement Forestier de Cassou, Burkina Faso