Characterization of the Ecological Niche and Determination of the Biomass of Pandanus spp. in the Dibombari Area, Douala-Cameroon

A study was carried out in the mangroves of Dibombari in order to determine the density of Pandanus spp., its biomass and its dendrometric characteristics in the sites of Njouki, Biendende and Bonamassouka. At each site studied, stand density, biomass and dendrometric characteristics were determined. To achieve our results, an inventory and the dendrometry of Pandanus spp. were carried out in transects of 10 m × 10 m where even the roots and leaves were counted, then the destructive method made it possible to determine the biomass. The results of the inventory show that in the sites of Njouki, Biendende and Bonamassouka, the density is respectively: 6100 plants/hectare; 4800 plants/hectare; 2800 plants/hectare. The individual plant biomasses of Pandanus spp. in the sites of Njouki, Biendende and Bonamassouka have respectively an aerial and underground biomass of 45%; 35% and 20%. The results of the dendrometry show that the average diameters, the average heights, the number of roots and leaves are respectively the following: 11.81 cm; 5.39 m; 44 leaves and 20 roots at Njouki, 9.43 cm; 8.63 m; 18 leaves and 11 roots in Biendende; 9.39 cm; 4.32 m; 73 leaves and 31 roots in Bonamassouka.