par Senterre, Bruno 
Référence Bulletin du Jardin Botanique National de Belgique, 71, 2, page (1087-1096)
Publication Publié, 2001
Référence Bulletin du Jardin Botanique National de Belgique, 71, 2, page (1087-1096)
Publication Publié, 2001
Article révisé par les pairs
| Résumé : | Three samples of Equato-Guinean rain forest have recently been studied under the project of CUREF (Conservación y Utilización Racional de los Ecosistemas Forestales de Guinea Ecuatorial). The rain forest of the Altos de Nsork region, in the eastern part of Equatorial Guinea, has been studied by the present author by 1 km long transects. The two other studies have been carried out by others at the rio Muni's estuary (southwestern part of the country) and in the Ndote reserve (central-western part). A total of 9970 trees with DBH ≥ 30 cm, belonging to 341 species determined at least to genus, were found on 93.5 ha. To take the vegetation variability of each site into account, a phytosociological table was established using TWINSPAN with twenty surveys of 160 × 10 m for DBH ≥ 10 cm trees, chosen in homogeneous parts of transect. The following species were found to be prominent in the zone near the coast: Desbordesia glaucescens, Calpocalyx heitzii, Alstonia congensis, Sacoglottis gabonensis, Anthostema aubryanum, Erythrophleum ivorense, Caloncoba glauca, Lophira alata, Croton oligandrus, etc. The species found to have a continental distribution included: Millettia laurentii, Sindoropsis letestui, Entandrophragma congoense, Celtis tessmannii, Dialium pachyphyllum, Dialium spp., Allanblackia floribunda, etc. Because of the abundance of these species, Nsork represents the most continental part of the lowerguinean atlantic region. The forests of the rio Muni' s estuary show a huge biodiversity because of their intermediate position and their rich habitat diversity. |
