The present study was carried out from 346 skulls of Praomys jacksoni (Muridae) captured in some forest areas of the surroundings of Kisangani city (island, right and left banks of Congo River) from 1994 to 1999). The results obtained from twenty-five skulls measurements revealed the diversity existing inside each population studied. The sexual dimorphism is favorable to males for seven measurements (GRLE, HEBA, DIA1, DIA2, INT, LNAS, and LOTE) whereas eighteen remain stable. The skulls of insular populations (Tundulu and Mbiye) are bigger than those of the forest reserves ( Masako and Yoko) for twenty measurements: GRLE, PRCO, HEBA, HEPA, DIA1, DIA2, INT, ZYPL, PAL, UPTE, UPDE, M1, BNAS, LNAS, BUL, DIN, HRZ, ROH, ROB and PCPA The skulls of Mbiye island populations are bigger than those of Tundulu island for eighteen measurements (GRLE, PRCO, HEBA, HEPA, PAF, DIA1, DIA2, ZYG, UPTE, UPDE, M1, ZYPL, BNAS, LNAS, LOTE, CHOA, DIN, PCPA). The skulls of populations from the left bank (Yoko forest reserve) are bigger than those of the right bank for six measures (GRLE, HEBA, DIA1, INT, CHOA and PAF). These results indicate that craniometrical measurements of the adult animals are stable and constitute a complementary means for identifying the species in the Praomys genus. The variations observed with certain examined characters would be the consequence of the biological phenomenon of speciation. It is thus desirable that molecular studies are carried out on these muridae in order to validate this hypothesis.

A floristic inventory of grass and undergrowth was carried out in the southern block of the Yoko Forest Reserve in the Eastern Province. This study aimed to identify grasses and undergrowth, and evaluate the wealth of this areal florula. Transect methods and phytosociological survey was the approach used. A total of 116 plant species have been inventoried and are belonging to 92 genera and 44 families. Note that the dominant families and features are: Commelinaceae (7.76%) and Rubiaceae (6.90%). The relative densities of species and the highest are those of family Marantochloa congensis (174.0 feet/ha) and Marantaceae (360.0 feet/ha). The relative frequencies of the most observed species are those of Palisota barteri (3.21%) and Cola congolana (3.39%), while those of family are Arecaceae, Commelinaceae, Connaraceae, Euphorbiaceae, Lomariopsidaceae, Malvaceae, Marantaceae and Menispermaceae (6.25%). Simpson's diversity index (0.957), Shannon’s diversity index (3.619) and equitability (0.798) revealed that this florula is diversified and its species are well distributed. It is thus desirable that this study is extended to other forest reserves and forest groupings of Kisangani city and its surroundings in order to establish a better database necessary for the sustainable management of the classified forests and other sites of high value for the conservation.

A floristic and structural composition studies of Kponyo forest, a forest close to the hunting field of Bili Uélé, was carried out with the aim of knowing the variability of the forest types through the evaluation of the parameters such as abundance, taxa predominance, basal area, biodiversity indices and the mode of space distribution of the dominant species in each inspected site. The method of subplot made it possible to sample two hectares (8 pieces of 50 m X 50 m). On the whole, 636 individuals belonging to 173 species and 66 families were inventoried. The species Gilbertiodendron dewevrei abounds the hydromorph land forest while the species Garcinia epunctata abounds the firm land forest. The Fabaceae family dominates this florule. Basal area average is 28,14m2/ha. The analysis according to the K repley® function of Gilbertiodendron dewevrei and Garcinia epunctata shows a random distribution within the settlement.

Democratic Republic of the Congo is among the countries who attach great importance to the conservation and sustainable management of natural resources. The aim of this floristic study was to evaluate the plant diversity of the Rubi-télé hunting area for a good sustainable management. This area is located in the Bas Uele province, Territory of Buta and the Community of Monganzulu village Sukisa (N: 02 ° 19 '072 "E: 024 ° 58' 368'; altitude: 471m). This reserve has an area of 9080 km2. All individuals with a diameter ≥ 10 cm were inventoried and measured 1.30 m above the grade. We opted for a targeted sampling of delineating the 50 m X 50 m plots (mixed forest) and where the Gilbertiodendron dewevrei (mono forest dominant) was abundant. The study conducted in the field hunting Rubi-Télé an area of 2ha led us census 452 individuals in the mixed forest divided into 79 species, 28 families; 267 individuals in the forest Gilbertiodendron dewevrei divided into 30 species, 14 families. Basal area for forest Gilbertiodendron dewevrei is 32,3m2/ha and mixed forest as basal area 23m2/ha. Julbernadia seretii is more abundant with a rate of 11.95%, in the mixed forest. Family Fabaceae leads with 30.87%. For Gilbertiodendron dewevrei forest species abounds its habitat, first with 46.44% of the family Fabaceae is leading with 64.12%, it appears that the mixed forest shows the scattering of the forest wealth specific Gilbertiodendron dewevrei because its diversity index values are low.