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Spatial structure and abundance in the Kahuzi-Biega Mountain vegetation formation in DR Congo (Albertine Rift): Case of Carapa grandiflora SPRAGUE and Symphonia globulifera L. F. in the resort of Tshivanga

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Research Paper 01/02/2018
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Spatial structure and abundance in the Kahuzi-Biega Mountain vegetation formation in DR Congo (Albertine Rift): Case of Carapa grandiflora SPRAGUE and Symphonia globulifera L. F. in the resort of Tshivanga

Mangambu Mokoso Jean De Dieu, Rwabika Mushengezi Anicet, Basinyize Birhashwirwa Pascal, Anataka Cizungu José, Nyamuto Bihinda Gisele, Shalufa Assani Nicole, Lokumu Ilombelombe Lucien-Géodeon, Ntahobavuka Habimana Honorine
Int. J. Biosci.12( 2), 215-230, February 2018.
Certificate: IJB 2018 [Generate Certificate]
Key: Carapa grandifloraSpatial distributionStructural ParametersSymphonia globulifera

Abstract

The present study was based on the study of the spatial distribution of two species, notably Carapa grandiflora and Symphonia globulifera, in the forest of the tourist site of Tshivanga in Kahuzi-Biega National Park on a surface of four considered habitats (hectares). In this study, we have used the nearest neighbor distance method to determine the type of distribution of these species. The study carried out allowed to sample a total of 1741 specimens belonging to 35 species and divided into 22 different families; from which 34 different species were found into the Carapa grandiflora population In the Symphonia globulifera population, 20 species were identified, divided into 13 families. From the point of view of distribution and abundance, we have noticed that the diametric growth rate for both species decreases from higher diameter classes to lower diameter classes, which implies the appearance of the regression curve (R2). The analysis of biodiversity for both populations under investigation shows that Equitability_J is equivalent to 0.5 and 0.4, which reflects a monodominance of these two populations. The comparison between diametric structures of specimens of different species within two stands shows a significant difference for the diametric structures of these two stands. The analysis of the spatial distribution of the two populations shows that, the distribution is uniform (regulator) for the Carapa grandiflora and in clumped spatial aggregate for the Symphonia globulifera. The forest types above presented differ in terms as structure and diversity. Any coherent and objective strategy of sustainable management of forests should integrate their specificities.

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