[ Facteurs de mortalité des arbres dans la réserve de biosphère de Yangambi: Site d’ISEKELENDE (Province de la Tshopo, RD Congo) ]
Volume 37, Issue 3, October 2022, Pages 577–587
O. Mbala1, L. Okungo2, D. Yenga3, B. Basosila4, and O. Lokonga5
1 Division Provinciale de l’Environnement et Développement Durable, Tshopo, RDC, BP 1309 Kisangani, RD Congo
2 Departement of Phytotechnic, Faculty of Agronomic Science, B.P. 1232, Faculty Institute of Agronomic Sciences of Yangambi, Kisangani, RD Congo
3 Institut Facultaire des sciences Agronomique de Yangambi (IFA-Yangambi), Département des Eaux et Forêts, BP 1232 Kisangani, PB 28 Yangambi, RD Congo
4 Institut Facultaire des sciences Agronomique de Yangambi (IFA-Yangambi), Département d’Economie Agricole, PB 1232 Kisangani, PB 28 Yangambi, RD Congo
5 Departement of Biotechnologics Sciences, Faculty of Sciences, B.P. 2012, University of Kisangani, RD Congo
Original language: French
Copyright © 2022 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 knowledge of the functioning of our forest ecosystems protected is an issue of the maintenance of the planetary balance as regards its biodiversity and its climate. Its floristic dynamic apprehended by the mortality of trees, has formed the base of this study in the site of Isekelende at the biosphere reserve of Yangambi (Tshopo, D.R. Congo). Collected in a device of 6 ha, the results arising from this study have shown that the rate of tree mortality is more than 4 times higher than the tropical average. The causes differ according to the type of mortality. For the mortality on foot, the aging and the Fungal pathologies are the causes mainly observed while for the Chablis, we cannot say with statistical certainty that the frequencies and the wind speeds which are the main causes. A spatial distribution of dead trees identified highlights a relief of specific gaps. This mosaic is positively correlated to the direction of the prevailing wind of Yangambi.
Author Keywords: Factors, mortality, tree, biosphere, reserve.
Volume 37, Issue 3, October 2022, Pages 577–587
O. Mbala1, L. Okungo2, D. Yenga3, B. Basosila4, and O. Lokonga5
1 Division Provinciale de l’Environnement et Développement Durable, Tshopo, RDC, BP 1309 Kisangani, RD Congo
2 Departement of Phytotechnic, Faculty of Agronomic Science, B.P. 1232, Faculty Institute of Agronomic Sciences of Yangambi, Kisangani, RD Congo
3 Institut Facultaire des sciences Agronomique de Yangambi (IFA-Yangambi), Département des Eaux et Forêts, BP 1232 Kisangani, PB 28 Yangambi, RD Congo
4 Institut Facultaire des sciences Agronomique de Yangambi (IFA-Yangambi), Département d’Economie Agricole, PB 1232 Kisangani, PB 28 Yangambi, RD Congo
5 Departement of Biotechnologics Sciences, Faculty of Sciences, B.P. 2012, University of Kisangani, RD Congo
Original language: French
Copyright © 2022 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 knowledge of the functioning of our forest ecosystems protected is an issue of the maintenance of the planetary balance as regards its biodiversity and its climate. Its floristic dynamic apprehended by the mortality of trees, has formed the base of this study in the site of Isekelende at the biosphere reserve of Yangambi (Tshopo, D.R. Congo). Collected in a device of 6 ha, the results arising from this study have shown that the rate of tree mortality is more than 4 times higher than the tropical average. The causes differ according to the type of mortality. For the mortality on foot, the aging and the Fungal pathologies are the causes mainly observed while for the Chablis, we cannot say with statistical certainty that the frequencies and the wind speeds which are the main causes. A spatial distribution of dead trees identified highlights a relief of specific gaps. This mosaic is positively correlated to the direction of the prevailing wind of Yangambi.
Author Keywords: Factors, mortality, tree, biosphere, reserve.
Abstract: (french)
La connaissance du fonctionnement de nos écosystèmes forestiers protégés est un enjeu du maintien de l’équilibre planétaire en ce qui concerne sa biodiversité et son climat. Sa dynamique floristique appréhendée par la mortalité des arbres, a constitué le socle de cette étude dans le site d’Isekelende, dans la réserve de biosphère de Yangambi (Tshopo, RD Congo). Recueillies dans un dispositif de 6 ha, les résultats découlant de cette étude ont montré que le taux de mortalité des arbres est plus de 4 fois supérieure à la moyenne tropicale. Les causes diffèrent selon le type de mortalité. Pour la mortalité sur pied, le vieillissement et les pathologies fongiques sont les causes principalement observées alors que pour les chablis, on ne peut dire avec certitude statistique que les fréquences et les vitesses du vent qui en sont les principales causes. Une distribution spatiale d’arbres morts identifiés met en évidence un relief des trouées particulières. Cette mosaïque est positivement corrélée à la direction du vent dominant de Yangambi.
Author Keywords: Facteurs, mortalité, arbres, réserve, biosphère.
How to Cite this Article
O. Mbala, L. Okungo, D. Yenga, B. Basosila, and O. Lokonga, “Tree mortality factors in the Yangambi biosphere reserve: ISEKELENDE site (Tshopo Province, DR Congo),” International Journal of Innovation and Applied Studies, vol. 37, no. 3, pp. 577–587, October 2022.
