[ Structure, diversité, richesse et similarité floristique des peuplements d’arbres en forêt dense de UMA (Province de la Tshopo, République Démocratique du Congo) ]
Volume 26, Issue 2, September 2016, Pages 568–599
Jean-Paul K. Shaumba1, Jean LEJOLY2, Hyppolite S.M. Nshimba3, Joseph Omatoko4, M.B. Ndjele5, and Koto-te-Nyiwa Ngbolua6
1 Faculté des Sciences, Université de Kisangani, RD Congo
2 Herbier de l'Université Libre de Bruxelles C.P. 169, Avenue F. Roosevelt, 50. 1050 Bruxelles, Belgium
3 Faculté des Sciences, Université de Kisangani, RD Congo
4 Faculté des Sciences, Université de Kisangani, RD Congo
5 Faculté des Sciences, Université de Kisangani, RD Congo
6 Département de Biologie, Faculté des Sciences, Université de Kinshasa, BP 190 Kinshasa XI, RD Congo
Original language: French
Copyright © 2016 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.
The present study was conducted with the aim of analyzing the physiognomy and structure of major forest types found at UMA. To achieve this study, 40 floristic inventories plots (of 0.25 ha each) were considered and all individuals with dbh ≥10 cm were identified. A total of 3882 trees were identified: 696 (348 trees/ha) for trees stand at Limbali on white sand, 657 (325.5 trees/ha) for trees stand at Limbali on ground hydromorphe, 731(365.5 trees/ha) for monodominant settlement of transition on sandy soil, 887 (443.5 trees/ha) for the heterogeneous population disturbed on clay soil and 991 (455.5 trees/ha) for the heterogeneous population on soil shallow and rocky. They represent a basal area of 32.85 m²/ha, 25.08 m²/ha, 25.56 m²/ha, 30.86 m²/ha and 31.67 m²/ha respectively. The difference in density and basal area was significant between tree stands in all compartments. Statistical analysis indicated a significant difference between populations for species diversity, and Shannon index (stratum A2), Simpson index, Fisher index (Alpha) and equitability (strata E+A1 and A2) but there was not any difference in (E + A1) stratum according to these biodiversity indices. There was floristic similarity between monodominant and heterogeneous stands transitions but no floristic similarity between heterogeneous tree stands and disturbed stands monodominant trees. So these two stands of trees are different. The heterogeneous transition stands is therefore only monodominant forest Julbernardia seretii the interior of what Gilbertiodendron dewevrei (Fabaceae) came to replace Julbernardia seretii (Fabaceae) in the stratum (E + A1).
Author Keywords: Tropical forest, Phytosociological data, Biodiversity, Democratic Republic of the Congo.
Volume 26, Issue 2, September 2016, Pages 568–599
Jean-Paul K. Shaumba1, Jean LEJOLY2, Hyppolite S.M. Nshimba3, Joseph Omatoko4, M.B. Ndjele5, and Koto-te-Nyiwa Ngbolua6
1 Faculté des Sciences, Université de Kisangani, RD Congo
2 Herbier de l'Université Libre de Bruxelles C.P. 169, Avenue F. Roosevelt, 50. 1050 Bruxelles, Belgium
3 Faculté des Sciences, Université de Kisangani, RD Congo
4 Faculté des Sciences, Université de Kisangani, RD Congo
5 Faculté des Sciences, Université de Kisangani, RD Congo
6 Département de Biologie, Faculté des Sciences, Université de Kinshasa, BP 190 Kinshasa XI, RD Congo
Original language: French
Copyright © 2016 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
The present study was conducted with the aim of analyzing the physiognomy and structure of major forest types found at UMA. To achieve this study, 40 floristic inventories plots (of 0.25 ha each) were considered and all individuals with dbh ≥10 cm were identified. A total of 3882 trees were identified: 696 (348 trees/ha) for trees stand at Limbali on white sand, 657 (325.5 trees/ha) for trees stand at Limbali on ground hydromorphe, 731(365.5 trees/ha) for monodominant settlement of transition on sandy soil, 887 (443.5 trees/ha) for the heterogeneous population disturbed on clay soil and 991 (455.5 trees/ha) for the heterogeneous population on soil shallow and rocky. They represent a basal area of 32.85 m²/ha, 25.08 m²/ha, 25.56 m²/ha, 30.86 m²/ha and 31.67 m²/ha respectively. The difference in density and basal area was significant between tree stands in all compartments. Statistical analysis indicated a significant difference between populations for species diversity, and Shannon index (stratum A2), Simpson index, Fisher index (Alpha) and equitability (strata E+A1 and A2) but there was not any difference in (E + A1) stratum according to these biodiversity indices. There was floristic similarity between monodominant and heterogeneous stands transitions but no floristic similarity between heterogeneous tree stands and disturbed stands monodominant trees. So these two stands of trees are different. The heterogeneous transition stands is therefore only monodominant forest Julbernardia seretii the interior of what Gilbertiodendron dewevrei (Fabaceae) came to replace Julbernardia seretii (Fabaceae) in the stratum (E + A1).
Author Keywords: Tropical forest, Phytosociological data, Biodiversity, Democratic Republic of the Congo.
Abstract: (french)
La présente étude a été menée dans le but d’analyser la physionomie et la structure des principaux types forestiers rencontrés à UMA. Pour réaliser cette étude, 40 parcelles de relevés d’inventaires (de 0,25 ha chacun) ont été mis en place et tous les individus à dbh ≥10 cm ont été répertoriés. Au total, 3882 arbres ont été recensés : 696 (348 arbres/ha) pour les peuplements à Limbali sur sable blanc, 657 (325,5 arbres/ha) pour les peuplements à Limbali sur sol hydromorphe, 731 (365,5 arbres/ha) pour peuplement monodominants de transition sur sol sableux, 887 (443,5 arbres/ha) pour le peuplement hétérogène perturbé sur sol argileux et 991 (455,5 arbres/ha) pour le peuplement hétérogène sur sol peu profond et rocailleux. Ils représentent respectivement une surface terrière de 32,85 m²/ha, de 25,08 m²/ha, de 25,56 m²/ha, de 30,86 m²/ha et 31,67 m²/ha. Les différences de densité et de la surface terrière sont significatives entre peuplements d’arbres dans tous les compartiments. Le test statistique a montré une différence significative entre peuplements en ce qui concerne la diversité spécifique et l’index de Shannon (strate A2), l’index de Simpson, l’index de Fisher (Alpha) et l’Equitabilité (strates E+A1 et A2). Cependant, aucune différence n’a été observée dans la strate (E+A1) par rapport à ces indices de biodiversité. Il y a donc similarité floristique entre peuplements monodomoinants et hétérogènes de transitons, mais pas de similarité floristique entre peuplements d’arbres hétérogènes perturbés et peuplements arbres monodominants. Donc ces deux peuplements d’arbres sont différents. Le peuplement hétérogène de transition n’est donc qu’une forêt monodominante à Julbernardia seretii à l’intérieure de laquelle Gilbertiodendron dewevrei (Fabaceae) est en train d’être remplacé par Julbernardia seretii (Fabaceae) dans la strate (E+A1).
Author Keywords: Forêt tropicale, Données phytosociologiques, Biodiversité, République Démocratique du Congo.
How to Cite this Article
Jean-Paul K. Shaumba, Jean LEJOLY, Hyppolite S.M. Nshimba, Joseph Omatoko, M.B. Ndjele, and Koto-te-Nyiwa Ngbolua, “Structure, diversity, richness and floristic similarity of tree communities in UMA dense forest (Tshopo Province, Democratic Republic of the Congo,” International Journal of Innovation and Scientific Research, vol. 26, no. 2, pp. 568–599, September 2016.
