Département d'Ecologie et Gestion des Ressources Végétales, Laboratoire de Palynologie, Anatomie du bois et biodiversité forestière, R.D. Congo, Faculté des Sciences, Université de Kisangani, B.P : 2012 Bukavu, RD Congo
This study conducted at the Eastern DR. Congo, the island Idjwi on plants used in the treatment of asthma falls 21 plant species. The decoction is the preparation method most used remedies with 15 species (68.1%). The oral route of administration is the most used with 18 species (81.8%). Among the organs of plants, the leaves take first place as staff members with 16 species (72.7%). The disease is common in Idjwi, the most observed cases cardiac asthma is mainly because most of the patients neglect the onset of the disease and the symptoms are difficult to observe amber even by specialists in this field. These different forms of the disease are caused by either hereditary or even environmental effects.
This study presents the results of a study on the inventory of honey plants and various bee products known to beekeepers Idjwi island in the South Kivu province in the Democratic Republic of Congo. To obtain reliable results we used three methods including surveys, observations and crops. This allowed us to find 111 species of woody plants alone account for 62 species or 55.86%. Liquid honey (Buki), the coaguleux honey (Sinde) and wax (Bishoko) are the three types of bee products known to beekeepers Idjwi. Honey is a basic element in the nutrition and health for island Idjwi.
The present study investigated the biology and ecology of Eremospatha haullevilleana De Wild. in the forest Reserve of the Yoko; one of the remnants of the primary forests in the Congo Basin, Democratic Republic Congo. The study aimed to evaluate the growth rate and the rate of formation of the new buds on the tufts in different conditions of light availability. 32 small rattan tufts were selected along 3000 m of phenologic trail and observed for a period of 9 months, from April to December 2008. The regression analysis was performed to determine the correlation between the growth, new buds formation rates and the light availability. The results showed that the growth rate of stem increased with time in open-up and semi-open-up habitats, whereas it decreased in shaded habitats. The open-up habitats appeared to be favorable environments to the survival of the stems of E. haullevilleana De Wild. Therefore, the formation of new buds was found to be slow (2 to 4 buds during the 9 months of investigation); and the ratio of underground biomass over surface biomass decreased with the density of light.
Though the national Kahuzi-Biega Park be necessarily covered with a forest of well distinguished canopy; it also possesses disturbed areas. This work aims at studying the floristic composition of Ferns and Fern Allies to assess vegetation disturbances in the mountain forests (ranging from 1250 meters to 3000 meters) within the Kahuzi-Biega National Park. Comparisons of vegetation features were made both in disturbed and non-disturbed habitats. Data were collected within 24 plots differently located following the 3 vegetation altitudinal ranges (submontane, montane, afro-alpine) taken into account. In each plot, 4 sampling units of 1ha each were established. Collected data included abundance and dominance features of plant species (both Ferns and their Allies, as well as woody species), tree diameter (DBH), and canopy height, the average of vegetation cover per forest layer (stratum) as well as floristic patterns and species richness. We referred to CANOCO and R (version 2.10.1) softwares to perform our statistical analyses. Results showed that the 3 altitudinal ranges offer differences in their floristic composition. The considered plant features (height, diametric structure) also express variations when disturbed and non-disturbed habitats are taken into consideration. This is for example illustrated by significant differences (results based on a t-test, p-value = 0.007) when one considers the occurrence of Ferns and their Allies. Within stable habitats, Ferns and their Allies particularize themselves by rich and much diversified communities. However, disturbed habitats (following various causes of permanent aggression) face major changes into the floristic composition of their major canopy tree species.