par Senterre, Bruno 
;Nguema, Norberto
Référence Bulletin du Jardin Botanique National de Belgique, 71, 2, page (837-846)
Publication Publié, 2001
;Nguema, NorbertoRéférence Bulletin du Jardin Botanique National de Belgique, 71, 2, page (837-846)
Publication Publié, 2001
Article révisé par les pairs
| Résumé : | Forest inventories have been made in the Altos de Nsork region, Equatorial Guinea. Within seven transects covering 33.5 ha, we have inventoried 3886 trees with DBH ≥ 30 cm (Diameter at Breast Height, measured at 1.3 m from the ground level), belonging to 226 species, and those with DBH ≥ 10 cm (689 trees belonging to 149 species) in eight sections of 160 × 10 m (1.28 ha). The comparison with other similar inventories made in central Africa showed a quite high biodiversity for the Nsork rain forests. This comparison also allowed us to indicate the characteristic species Engomegoma gordonii (3.2 stems/ha for the trees with DBH ≥ 30 cm; Olacaceae) and Stachyothyrsus staudtii (1.8; Caesalpiniaceae), and also the preferential species of the Nsork region as Coula edulis (4.4), Sindoropsis letestui (1.1), Dialium pachyphyllum (1.4), Allanblackia floribunda (3.9), Dacryodes buettneri (1.9), ... The Nsork rain forest is marked by the abundance of the Burseraceae and the Olacaceae. Among the 74 emergent species (DBH ≥ 70 cm), the most abundant are: Aucoumea klaineana (3.1 stems/ha), Scyphocephalium mannii (1), Engomegoma gordonii (0.6), Coula edulis (0.5), Pterocarpus soyauxii (0.3), Sindoropsis letestui (0.2), Pentaclethra macrophylla (0.2) and Monopetalanthus letestui (0.2). In the lower trees stratum (DBH ≥ 10 cm) we find mainly Santiria trimera (61 stems/ha), Microdesmis puberula (45), Heisteria parvifolia (37), Dichostemma glaucescens (20) and Centroplacus glaucinus (9). The biodiversity seems to be highest in the lower trees stratum. |
