Since its accession to the independence, the Democratic Republic of Congo knew a succession of the disorders and wars with negative impacts on its economic tissue, its social and cultural development. The succession of wars which the R.D. Congo especially in its East part knew maintained a climate of insecurity in the National Park of Kahuzi-Biega and its periphery, more precisely in Health area of Cibumbiro in the health Zone of Miti-Murhesa and much more in its littoral part with the National Park of Kahuzi-Biega. The war of Rwanda and the massive arrival of the Rwandan refugees in RDC involved wars known as of "release", the creation of the militia and groups armed and conflicts between the ethnos Congolese Groups. This conflict generated many cases of plundering, rapes and massacres, which generated the disappearance of domestic fauna. Plundering themselves make lose 49 % of the domestic cattle and the fear of future plundering made the disappearance of its 51% ; such are the principal causes of the disappearance of domestic fauna in the health area of Cibumbiro.
A survey on the inventory of woody flora on the west coast of Lake Kivu has been done precisely in Katana region. Transect and quadrat methods have been used in the sites and many species inventoried of the vegetation have been recognized relics as: Brideliia bridelifolia, Vernonia amygdalina,Ficus lutea, Albizia grandibracteata, Tabernaemontana jonhstoni, Urera sp, Markhamia lutea, Erythrina abyssinica, Ficus vallis-choudae, Maessa lanceolata showing that there was primary forest in the region but was destroyed by anthropogenic activities.
A research has been made in Katana area in order to know the causes of woody flora disappearance in the occidental part of Kivu Lake in the Democratic Republic of Congo. Investigation method and free observations helped us on the ground. The obtained results confirmed that the woody flora have been damaged by human activities. 100% of population from the area has agreed the flora damage. Agriculture takes the first place as the cause of woody flora disappearance about 36% followed by the research of the live embers and firewood which takes 20%, building is concerned about 17%; sawmill about 15% and the brickworks take 12%.
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