Browsing by Author "A. Dansi"

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    Caractérisation phytoécologique des habitats de Dioscorea praehensilis Benth. (Dioscoreaceae) dans la zone sub-humide du Togo
    (Bull. sci. Inst. natl. environ. conserv. nat. 13: 43-59, 2014-12) Wembou, E. P.; K. Tozo; A. Dansi; Y. A. Woegan, W. Atakpama, K. Batawila, K. Wala, K. Akpagana
    This study aims at characterizing the phytosociology of D. praehensilis habitats and analyzing the regeneration potential of its population in the southwest of Togo. Floristic inventories within D. praehensilis plant community were carried out according to Braun-Blanquet. A total of 303 species belonging to 255 genera and 71 families were recorded. The most species rich families were Fabaceae. The flora is essentially Guinean and dominated by phanerophytes. On the basis of the plots that have been classified separately according to floristic composition using the Detrended Correspondance Analysis (DCA) method, six plant communities were identified as home gardens group of northern climatic region, home gardens group of southern climatic region, semi-deciduous moist forest group, riparian forest group, agroforests group, thickets group. Plant parameters varied from one group to another. Thus, species richness varies from 48 to 151 species, Shannon diversity index of 5.19 to 6.86 bits, Pielou evenness from 0.93 to 0.94 and the diversity of families is between 26 and 53 with a predominance of Fabaceae. The study showed that the natural habitats of D. praehensilis are threatened ecosystems; this is harmful for the long-term preservation of the species. Thanks to a high density of seedling regeneration, the forest clearly has significant potential for resilience. It would be important to undertake finer analyses on demographic parameters in order to detect forests patches which should be indicated for an in situ program of preservation.