Analyse de la flore et la végétation de la zone nickélifère de Waga en Commune Nyarusange Province Gitega, son importance pour la population locale et l’évolution de l’occupation du sol
| dc.contributor.author | Nduwimana, Jean Marie Vianney | |
| dc.contributor.author | Sous la direction de : Dr. Bararunyeretse Prudence | |
| dc.date.accessioned | 2026-04-24T08:01:31Z | |
| dc.date.available | 2026-04-24T08:01:31Z | |
| dc.date.issued | 2024-05 | |
| dc.description | Mémoire présenté en vue d’obtenir le Diplôme de Master en Biologie des Organismes et Ecologie Spécialité : Gestion des Paysages et Ecosystèmes Terrestres | |
| dc.description.abstract | The strong disturbance of landscapes is considered one of the main factors in the loss of plant biodiversity. This regression of plant cover is linked to anthropogenic activities, increasing climate variability and climate changes which lead to significant degradation of ecosystems. The decline in resources has also had an impact on the ecosystem services that biodiversity provides to local populations, including harvesting services for food, energy, construction, medicine, crafts and ornament. Vegetation plays a very important role in maintaining ecological balance. Man, because of galloping demographics, continues to endanger the relic ecosystems of ancient vegetation, particularly through the overexploitation of natural resources to cure diseases, for food, energy, clothing and the construction of houses. This study contributes to the knowledge of the floristic and plant diversity of the Waga nickel zone, its importance for humans and the spatio-temporal evolution of this zone. Phytosociological survey methods using transect subdivided into quadrats were used. In total, 80 quadrats of 20 x 10 m each were installed in the Waga nickel zone. A survey was carried out using random sampling to assess the importance of vegetation to the local population. The floristic inventory revealed 276 species distributed in 196 genera and 66 families. The families most represented at the specific level are Poaceae (26%), Asteraceae (24%), Fabaceae and Euphorbiaceae (11%). The biological forms of plants from the Waga nickel zone have almost similar raw spectra. Phanerophytes represent 36.96%, followed by Chamephytes (22.46%), Telophytes (18.84%), Hemicryptophytes (13.77%) and Geophytes (7.97%). Taking into account phytogeographic territories, species with a wide regional distribution are the most dominant, i.e. 37.65% of species, followed by species with a wide distribution (32.94%), African species (22.75%) and linkage species (6.67%). This predominance of species with regional distribution confirms the situation of Burundi at the crossroads of several phytogeographic regions. These species are dominated by species from the Sudano-Zambezian region with 29.02% of species, followed by mountain species (8.63%). Considering the distribution of ZNW species into higher taxa, dicotyledonous angiosperms are the most represented (76.45%). As for the evaluation of the importance of vegetation for the local population, material uses were the most reported, followed by medicinal uses, energy, food, fodder, and cultural. We must advocate the popularization of native species reported to be important for the restoration of the Waga nickel zone. Key words: nickel-bearing zone, plant diversity, biological traits, importance for the local population, ecological restoration. | |
| dc.identifier.uri | https://repository.ub.edu.bi/handle/123456789/2269 | |
| dc.language.iso | fr | |
| dc.publisher | UB: FSE | |
| dc.title | Analyse de la flore et la végétation de la zone nickélifère de Waga en Commune Nyarusange Province Gitega, son importance pour la population locale et l’évolution de l’occupation du sol |