la diversité et la composition floristique de la forêt primaire mixte de Uma dans les environs de Kisangani

This  memory  is the result of a survey of the diversity and composition floristique of the  mixed  primary  forest of Uma  in  the  vicinity  of Kisangani,  whose global objective  was to  study  the diversity and  the composition   of this forest region while  determining   the  quantitative  features  of the  recorded  species,  to  analyze  the recorded biologic specters and to study some indications  of diversity. The  method  of placeaux  by the  measure  of dbh (diameter  to height of chests)? to 10 em, allowed us to inventory 3 665 individuals  in the ten parcels of 200 x m 50 m distributed  in 181 species, 110 kinds and 34 families. The middle density is of 367 feet by hectare.  At the  time of hold of dbh,  the  species Julbemardia   seretii and Prioria  oxyphylla  were  dominant  because  of their  frequencies  and  elevated  densities and the families of the Fabaceaes  and Malvaceaes  are dominant. The  analyses  of the biologic specters showed that  the trees are the most dominant.   Among   the  dominant   biologic  types  the  Mesophanerophyteses    are,  the species    Congolese      . centro-guineo       dominates       among       the      distribution phytogeographique  and the sarcochores predominate  for what is of type ofdiaspores. The  class  1 (10-19,9) dominates  with  59% among  the diametric  classes and the  indication  of diversity  Fisher  alpha  calculated  watch  that  the forest of Uma considered for this work presents a more elevated diversity value (45,78%).