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http://dx.doi.org/10.7747/JFES.2022.38.2.90

Analysis of Composition and Diversity of Natural Regeneration of Woody Species in Jebel El Gerrie Dry Land Forest East of Blue Nile State, Sudan  

Abuelbashar, Ahmed Ibrahim (Agricultural Research Corporation, Forest Research and Gum Arabic Centrer)
Ahmed, Dafa-Alla Mohamed Dafa-Alla (University of Khartoum, Faculty of Forestry-Shambat)
Siddig, Ahmed Ali Hassabelkreem (University of Khartoum, Faculty of Forestry-Shambat)
Yagoub, Yousif Elnour (University of Khartoum, Faculty of Forestry-Shambat)
Gibreel, Haithum Hashim (University of Khartoum, Faculty of Forestry-Shambat)
Publication Information
Journal of Forest and Environmental Science / v.38, no.2, 2022 , pp. 90-101 More about this Journal
Abstract
The study aims to assess composition, diversity and population indices of natural regeneration of woody species in Jebel El Gerrie forest reserve, Blue Nile State, Sudan. We conducted field work between December 2018 and January 2019. We used random sampling to collect vegetation data in the forest where we made a total of 90 circular sample plots (radius 17.84 m) and distributed them proportionally to the area of each of the four density-based vegetation classes of the forest i.e. high density (C1), medium density (C2), low density (C3) and crop land (C4). In each sample plot we identified all regenerating tree species and counted their regeneration frequencies. We calculated ecological metrics of regeneration frequency, density, abundance, richness, evenness, diversity and importance value index (IVI) and drew abundance rank curve. Results revealed that out of fifteen mature tree species present, natural regeneration of 8 species, which belong to 6 families, was observed. The relatively most frequently naturally regenerating and abundant species were Anogeissus leiocarpa and Combretum hartmannianum. Richness, evenness and diversity of regenerating species were 1.33, 0.82 and 1.7, respectively. One-way ANOVA (α=0.05) of mean regeneration densities disclosed that there were significant differences (F3,86=16.77, p=0.000) between C2 & C3 (p=0.000) and C2 & C4 (p=0.000). While regeneration of seven tree species were absent, two, two and four species were of good, poor and fair regeneration status, respectively. A comparison of mean density of natural regeneration with that of parent trees reflects a poor regeneration status of the forest. The study provides empirical results on the regeneration status of species and signifies the need for management interventions for species conservation and restoration, maintenance of biodiversity and sustainable production.
Keywords
Sudan; natural regeneration; diversity; dry land forest;
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