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http://dx.doi.org/10.7747/JFES.2022.38.3.174

Assessing Trees Diversity in Jebel Elgarrie Forest Reserve in the Blue Nile State, Sudan  

Dafa-Alla, Dafa-Alla Mohamed (Faculty of Forestry-Shambat, University of Khartoum)
Abuelbasher, Ahmed Ibrahim (Forest Research and Gum Arabic Centre, Agricultural Research Corporation)
Gibreel, Haytham Hashim (Faculty of Forestry-Shambat, University of Khartoum)
Yagoub, Yousif Elnour (Faculty of Forestry-Shambat, University of Khartoum)
Siddig, Ahmed Ali Hassabelkreem (Faculty of Forestry-Shambat, University of Khartoum)
Hasoba, Ahmed Mustafa Morad (Faculty of Forest Sciences and Technology, University of Gezira)
Publication Information
Journal of Forest and Environmental Science / v.38, no.3, 2022 , pp. 174-183 More about this Journal
Abstract
The study aims to examine population indices of mature trees in Jebel Elgarrie forest, Blue Nile State, Sudan. We used remote sensing techniques to stratify the forest into vegetation classes depending on tree density. We distributed 97 circular sample plots (0.1 ha) proportionally to the area of the vegetation classes. In each sample plot we identified, counted and recorded all mature trees (DBH ≥10 cm). We calculated frequency, density, abundance, richness, evenness and diversity for each species and we drew abundance rank curve of mature trees. We used One-Way ANOVA to test for differences (α=0.05) in mean density (No./ha) of mature trees between vegetation classes. Results revealed that the forest was conveniently sub-divided into high density (C1), medium density (C2), low density (C3) and bare farm land (C4) classes. We identified fifteen tree species that belong to 10 families and 14 genera. Combretaceae and Fabaceae were the common families while Anogeissus leiocarpa was the most frequently occurring species. While species diversity varied between vegetation classes, diversity of the forest as a whole is low. While mean density of mature trees in C1, C2, C3 and C4 it was 100, 74, 10, and 0, respectively, it was 54 for the whole forest indicating low stocking, Following One-Way ANOVA, multiple comparisons revealed significant differences in mean density of mature trees between C1 & C3 and C2 & C3. The study provided empirical results on population indices of mature tree species, which would be of importance for successful management and conservation of the forest.
Keywords
conservation; mountain forest; species composition; sustainable management;
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