Inventory of rare or threatened plants of low Casamance
Lower Casamance corresponds to the region of Ziguinchor which occupies the extreme south of Senegal. In spite of a very rich biodiversity, its flora knows for some years considerable disturbances. This study is a survey of the populations of the targeted areas, with a view to identifying the rare or endangered plants, the different uses, the parts of plants used and the causes of these threats. During this survey, 87 species considered rare or threatened with extinction were listed, the most commonly mentioned being Khaya senegalensis, Carapa procera, Landolphia hirsuta, Parinari excelsa, Pterocarpus erinaceus. The distribution by department shows that the departments of Bignona and Oussouye each have 56 species and Ziguinchor 35 species. These plants are mainly used in pharmacopoeia, food and crafts with respectively 32.54%, 26.98% and 15.87% of cases. The fruits with 25.09% of the cases, are the most used organs, followed by wood (19.86%), leaves (16.03%), roots (13.59%), and barks of stems. (12.89%). Rainfall deficit, overexploitation of resources and bush fires have been identified as the main causes of biodiversity loss. The study shows that the plant biodiversity of Lower Casamance is home to several threatened species, the main causes of this loss being climate hazards and human actions.
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