Floristic and structural studies of the forest blocks of Nangui Abrogoua University, Cote d'Ivoire | JBES

The rainforest, which contains more than half of the overall species diversity, is under increasing anthropogenic pressure. One of the consequences of this disappearance is the transformation of the forest landscape into a fragment of forest. This is the case of the forest relic located within the Nangui Abrogoua University. However, this forest is subject to strong anthropogenic pressures which through poaching, uncontrolled takeoffs of natural resources and some agricultural clearing. To assess the plant species diversity in this relic forest, plots, linear and itinerant surveys were conducted in this forest. To cover for the plots method, the Nangui Abrogoua Forest has been divided into 110 squares of 10 m by side. The linear method consists of counting all the points of contact of the vegetation along an imaginary vertical line, placed in an equidistant way along a graduated ribbon. The standard length of the transect is 200 meters. To get a more accurate estimation of species richness and composition, additional species were added thanks to itinerant prospection. At the end of the study; we will have respectively 75 71 and 77 species divided between 65 62 and 73 genres and 36 34 38 families for Block I, Block II and Block III. At the level of the families of the whole forest, the results on the floristic wealth indicate to us that the richest families in the Blocks are Rubiaceae (Block I), Apocynaceae (Block II) and Euphorbiaceae (Block III). The study showed that many human activities are threatening the integrity of the three blocks. This research is published by an open-access research journal on Environmental sciences and biodiversity.