[ Influence des facteurs écologiques sur la répartition de Juvéniles sous semenciers et Modèle écologique de recrutement de Milicia excelsa (Welw.) C. C. Berg dans une forêt semi-décidue du nord-est de la RD Congo ]
Volume 35, Issue 2, January 2022, Pages 302–314
N'tambwe Nghonda Dieu-donné1, Langunu Serge2, Konga ya Sangwa Nicolas3, Sumbu Tshimanga Billy4, Kalunga Kasongo Aline5, Mashagiro Grace Queen6, Katusi Lomalisa Roger7, and Nshimba Seya Wa Malale Hippolyte8
1 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
2 Département de Phytotechnie (UNILU), Faculté des Sciences Agronomiques, Université de Lubumbashi, RD Congo
3 Département de Gestion de Ressources Naturelles Renouvelables, Faculté des Sciences Agronomiques, Université de Lubumbashi, Lubumbashi, RD Congo
4 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
5 Département de Phytotechnie, Faculté des Sciences Agronomiques, Université de Kalemie, RD Congo
6 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
7 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, Kisangani, RD Congo
8 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, 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.
A study on Iroko’s regeneration was done under four seed-trees (two in a young fallow and two in a secondary forest). The aim was to know ecological factors what are influencing his spatial distribution and ecological recruitment pattern of juveniles under its seed-trees. Under each seeder, eight directions were selected according to the wind rose on 1 ha. The light, slope, and litter thickness were measured over the eight directions divided into 5m x 3m plots. For each found juvenile, its high and distance to the seeder were measured. Seventy-three juveniles were found, 47 in the young fallow and 16 in the secondary forest. More juveniles were found in young fallow under seeder 2 (28 juveniles) and few juveniles under seeder 3 in the secondary forest (5 individuals). Means of 23.5 ± 4.5 and 8 ± 3 juveniles were found in young fallow and secondary forest respectively. The overall average of juveniles per seeder was 15.75 ± 7.75 juveniles.
Author Keywords: distribution, Juveniles, Milicia excelsa, Iroko, ecological recruitment pattern.
Volume 35, Issue 2, January 2022, Pages 302–314
N'tambwe Nghonda Dieu-donné1, Langunu Serge2, Konga ya Sangwa Nicolas3, Sumbu Tshimanga Billy4, Kalunga Kasongo Aline5, Mashagiro Grace Queen6, Katusi Lomalisa Roger7, and Nshimba Seya Wa Malale Hippolyte8
1 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
2 Département de Phytotechnie (UNILU), Faculté des Sciences Agronomiques, Université de Lubumbashi, RD Congo
3 Département de Gestion de Ressources Naturelles Renouvelables, Faculté des Sciences Agronomiques, Université de Lubumbashi, Lubumbashi, RD Congo
4 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
5 Département de Phytotechnie, Faculté des Sciences Agronomiques, Université de Kalemie, RD Congo
6 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
7 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, Kisangani, RD Congo
8 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, 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
A study on Iroko’s regeneration was done under four seed-trees (two in a young fallow and two in a secondary forest). The aim was to know ecological factors what are influencing his spatial distribution and ecological recruitment pattern of juveniles under its seed-trees. Under each seeder, eight directions were selected according to the wind rose on 1 ha. The light, slope, and litter thickness were measured over the eight directions divided into 5m x 3m plots. For each found juvenile, its high and distance to the seeder were measured. Seventy-three juveniles were found, 47 in the young fallow and 16 in the secondary forest. More juveniles were found in young fallow under seeder 2 (28 juveniles) and few juveniles under seeder 3 in the secondary forest (5 individuals). Means of 23.5 ± 4.5 and 8 ± 3 juveniles were found in young fallow and secondary forest respectively. The overall average of juveniles per seeder was 15.75 ± 7.75 juveniles.
Author Keywords: distribution, Juveniles, Milicia excelsa, Iroko, ecological recruitment pattern.
Abstract: (french)
Une étude sur la régénération de l’Iroko a été faite Sous quatre semenciers (Deux dans une jeune jachère et deux dans une forêt secondaire). L’objectif était de déterminer les facteurs écologiques influençant la répartition et le modèle écologique de recrutement des juvéniles sous ses pieds producteurs. Sous chaque semencier, huit directions ont été retenue selon la rose du vent sur 1 ha. La lumière, la pente et l’épaisseur de la litière ont été mesurées sur les huit directions divisées en placettes de 5m x 3m. Pour chaque juvénile trouvé, sa taille et sa distance au pied producteur ont été mesurées. Soixante-trois juvéniles ont été trouvés dont, 47 dans la jachère jeune et 16 dans la forêt secondaire. Plus des juvéniles ont été trouvés dans la jachère jeune (Semencier 2), soit 28 individus et peu de juvéniles sous le semencier 3 dans la forêt secondaire, soit 5 individus. Des moyennes de 23,5 ± 4,5 et 8 ± 3 juvéniles ont été trouvées dans la jachère jeune et dans la forêt secondaire respectivement. La moyenne générale de juvéniles par semencier était de 15,75 ± 7,75 individus.
Author Keywords: répartition, Juvéniles, Milicia excelsa, Iroko, modèles écologiques de recrutement.
How to Cite this Article
N'tambwe Nghonda Dieu-donné, Langunu Serge, Konga ya Sangwa Nicolas, Sumbu Tshimanga Billy, Kalunga Kasongo Aline, Mashagiro Grace Queen, Katusi Lomalisa Roger, and Nshimba Seya Wa Malale Hippolyte, “Influence of ecological factors on the distribution of juveniles under seedlings and ecological model of recruitment of Milicia excelsa (Welw.) C. C. Berg in a semi-deciduous forest in northeastern DR Congo,” International Journal of Innovation and Applied Studies, vol. 35, no. 2, pp. 302–314, January 2022.
