Volume 35, Issue 1, December 2021, Pages 175–183
N'tambwe Nghonda Dieu-donné1, Langunu Serge2, Kilela Mwanasomwe Jacques3, Tshibungu Nkulu Alain4, Sumbu Tshimanga Billy5, Mashagiro Grace Queen6, Kalunga Kasongo Aline7, Katusi Lomalisa Roger8, and Nshimba Seya Wa Malale Hippolyte9
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 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
4 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
5 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, 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 Phytotechnic, Faculty of Agricultural Sciences, University of Kalemie, Kalemie, RD Congo
8 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, Kisangani, RD Congo
9 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, Kisangani, RD Congo
Original language: English
Copyright © 2021 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.
This study aims to analyse spatial distribution and interactions that can exist between different Growth stages of Milicia excelsa (Iroko) and also, between its seedlings and adults of other species in order to provide to forest managers a tool for sustainable management of the natural population of this species. A full inventory was carried out in a semi-deciduous and anthropized forest of Central Africa in the north-east of DR Congo in six hectares with the Cartesian coordinates of all tree individual species taken. Data from this inventory were encoded and statistically analysed using the «ads» package of R Software to determine the point processes observed in this habitat. Results showed that Iroko trees have a random spatial distribution with low aggregations in the ecosystem. Individuals of the same growth stage live in aggregate while those of different growth stage have negative interactions (Competition - repulsion) on non-negligible radius. The diametric structure of its individuals is well balanced but showing a regeneration significantly low.
Author Keywords: Spatial structure, interactions, Growth stages, Milicia excelsa, Iroko.
N'tambwe Nghonda Dieu-donné1, Langunu Serge2, Kilela Mwanasomwe Jacques3, Tshibungu Nkulu Alain4, Sumbu Tshimanga Billy5, Mashagiro Grace Queen6, Kalunga Kasongo Aline7, Katusi Lomalisa Roger8, and Nshimba Seya Wa Malale Hippolyte9
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 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
4 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, RD Congo
5 Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, B.P: 1825, Lubumbashi, 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 Phytotechnic, Faculty of Agricultural Sciences, University of Kalemie, Kalemie, RD Congo
8 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, Kisangani, RD Congo
9 Department of Ecology and Plants Resource Management, Faculty of Science, University of Kisangani, B.P: 2012, Kisangani, RD Congo
Original language: English
Copyright © 2021 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
This study aims to analyse spatial distribution and interactions that can exist between different Growth stages of Milicia excelsa (Iroko) and also, between its seedlings and adults of other species in order to provide to forest managers a tool for sustainable management of the natural population of this species. A full inventory was carried out in a semi-deciduous and anthropized forest of Central Africa in the north-east of DR Congo in six hectares with the Cartesian coordinates of all tree individual species taken. Data from this inventory were encoded and statistically analysed using the «ads» package of R Software to determine the point processes observed in this habitat. Results showed that Iroko trees have a random spatial distribution with low aggregations in the ecosystem. Individuals of the same growth stage live in aggregate while those of different growth stage have negative interactions (Competition - repulsion) on non-negligible radius. The diametric structure of its individuals is well balanced but showing a regeneration significantly low.
Author Keywords: Spatial structure, interactions, Growth stages, Milicia excelsa, Iroko.
How to Cite this Article
N'tambwe Nghonda Dieu-donné, Langunu Serge, Kilela Mwanasomwe Jacques, Tshibungu Nkulu Alain, Sumbu Tshimanga Billy, Mashagiro Grace Queen, Kalunga Kasongo Aline, Katusi Lomalisa Roger, and Nshimba Seya Wa Malale Hippolyte, “Spatial structure and interactions inter-and intragrowth stages of Milicia excelsa (Welw.) C. C. Berg (Iroko) in the semi-deciduous forest, north-east of Democratic Republic of Congo,” International Journal of Innovation and Applied Studies, vol. 35, no. 1, pp. 175–183, December 2021.
