[ Biodiversité et stocks de carbone dans les différents peuplements forestiers d’Isangi, RD Congo ]
Volume 26, Issue 4, July 2019, Pages 1180–1192
Célestin ADEITO MAVUNDA1, Faustin BOYEMBA BOSELA2, Adrien DJOMO3, and John KATEMBO MUKIRANYA4
1 Institut Supérieur d’Etudes Agronomique de Bengamisa, Section de Gestion des Ressources Naturelles Renouvelables, B.P. 202 Kisangani, RD Congo
2 Université de Kisangani, Faculté des Sciences, Département d’Ecologie et Gestion des Ressources Végétales, Laboratoire d’Ecologie et Aménagement Forestier, B.P. 2012 Kisangani, RD Congo
3 Université de Queen’s, Département de Géographie, Kingston, ON K7L3N6, Canada
4 Institut Supérieur d’Etudes Agronomique de Bengamisa, Section de Gestion des Ressources Naturelles Renouvelables, B.P. 202 Kisangani, RD Congo
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Description of the subject. In tropical Africa, relations between biomass, diversity and floristic composition are poorly understood and rarely addressed in studies of forest ecology. Objectives. The aim of this study carried out in the forest of Isangi (latitudes 00 °30’ 00’’N and 01°05’00’’N and longitudes 23°40’00’’E and 24°30’00’’E) was to test the floristic, structural (density, basal area, diameter structure) variability and carbon stocks between the different forest types of the area and to analyze the relationship between biomass and species richness and species composition. Methods. Data were recorded on trees with dbh ≥ 10 cm in 145 plots of 50 x 50 m² installed in different land use classes (fallow of different ages, secondary forest, mixed forest on dry land, mixed primary forest on hydromorphic soils and monodominant forest with G. dewevrei). Non-symmetric correspondence analysis (NSCA) allowed discriminating the floristic composition in different groups. Results. This study showed the presence of floristic and structural variability and the difference in total biomass between the four forest types studied. There was also positive correlation between biomass and standardized species richness, density and basal area. Conclusion. This study shows the importance of the upper stratum (dbh ≥ 30 cm) in the accumulation of biomass (about 85% of storage).
Author Keywords: Floristic diversity, biomass, forest type, forest of Isangi, DR Congo.
Volume 26, Issue 4, July 2019, Pages 1180–1192
Célestin ADEITO MAVUNDA1, Faustin BOYEMBA BOSELA2, Adrien DJOMO3, and John KATEMBO MUKIRANYA4
1 Institut Supérieur d’Etudes Agronomique de Bengamisa, Section de Gestion des Ressources Naturelles Renouvelables, B.P. 202 Kisangani, RD Congo
2 Université de Kisangani, Faculté des Sciences, Département d’Ecologie et Gestion des Ressources Végétales, Laboratoire d’Ecologie et Aménagement Forestier, B.P. 2012 Kisangani, RD Congo
3 Université de Queen’s, Département de Géographie, Kingston, ON K7L3N6, Canada
4 Institut Supérieur d’Etudes Agronomique de Bengamisa, Section de Gestion des Ressources Naturelles Renouvelables, B.P. 202 Kisangani, RD Congo
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Description of the subject. In tropical Africa, relations between biomass, diversity and floristic composition are poorly understood and rarely addressed in studies of forest ecology. Objectives. The aim of this study carried out in the forest of Isangi (latitudes 00 °30’ 00’’N and 01°05’00’’N and longitudes 23°40’00’’E and 24°30’00’’E) was to test the floristic, structural (density, basal area, diameter structure) variability and carbon stocks between the different forest types of the area and to analyze the relationship between biomass and species richness and species composition. Methods. Data were recorded on trees with dbh ≥ 10 cm in 145 plots of 50 x 50 m² installed in different land use classes (fallow of different ages, secondary forest, mixed forest on dry land, mixed primary forest on hydromorphic soils and monodominant forest with G. dewevrei). Non-symmetric correspondence analysis (NSCA) allowed discriminating the floristic composition in different groups. Results. This study showed the presence of floristic and structural variability and the difference in total biomass between the four forest types studied. There was also positive correlation between biomass and standardized species richness, density and basal area. Conclusion. This study shows the importance of the upper stratum (dbh ≥ 30 cm) in the accumulation of biomass (about 85% of storage).
Author Keywords: Floristic diversity, biomass, forest type, forest of Isangi, DR Congo.
Abstract: (french)
Description du sujet. En Afrique tropicale, les relations entre la biomasse, la diversité et la composition floristique sont mal connues et rarement abordées dans les études d’écologie forestière. Objectifs. Le but de cette étude était de tester dans la région forestière d’Isangi, (en République Démocratique du Congo) en évaluant la variabilité floristique, structurale et la biomasse forestière entre les différents types forestiers et ; d’analyser les relations entre la biomasse d’une part et la richesse et la composition spécifique d’autre part. Méthode. Les mesures ont été effectuées sur les arbres à dhp ≥ 10 cm dans 145 parcelles de 50 x 50 m² installées dans les différents types forestiers (Jachères de différents âges, forêt secondaire, forêt primaire mixte sur terre ferme, forêt primaire mixte sur terre hydromorphe et forêt monodominante à Gilbertiodendron dewevrei). L’analyse non symétrique de correspondance (NSCA) a permis de discriminer les différentes formations forestières. Résultats. Les résultats trouvés montrent la présence d’une variabilité floristique et structurale et la différence de biomasse entre les types forestiers étudiés. Cette étude montre aussi des corrélations positives entre la biomasse d’une part et la richesse spécifique standardisée, la densité (N/ha) et la surface terrière d’autre part. Conclusion. Cette étude montre l’importance de la strate supérieure (dhp ≥ 30 cm) dans l’accumulation de la biomasse (près de 85 % de stockage).
Author Keywords: Diversité floristique, biomasse, type forestier, forêts d’Isangi, RD Congo.
How to Cite this Article
Célestin ADEITO MAVUNDA, Faustin BOYEMBA BOSELA, Adrien DJOMO, and John KATEMBO MUKIRANYA, “Biodiversity and carbon stocks in different forest stands from Isangi, DR Congo,” International Journal of Innovation and Applied Studies, vol. 26, no. 4, pp. 1180–1192, July 2019.
