COMPARATIVE ANALYSIS OF DIVERSITY, USES AND REGENERATION STATUS OF WOODY SPECIES, AND SOIL ORGANIC CARBON STOCK OF CONSERVED AND NON-CONSERVED DIKICHA SUB-WATERSHEDS: BORANA ZONE, SOUTHERN E

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Abstract:

A study was conducted in Dikicha Kebele, Miyo District, Borana Zone of Southern Ethiopia, to compare woody species diversity, uses, and regeneration status, and soil organic carbon of conserved and non -conserved adjacent sub-watersheds. In each sub-watersheds, four transect lines were systematically laid parallel to each other at 200 m interval. Ten nested sample plots were established at interval of 50m along each transect lines. The main plots had 30m X 30m while sub-plots had 5m X 5m. Key Informants (herders, elders, and experts) were selected purposively to identify the uses of encountered woody species. Local name was identified, height and diameters were measured for woody species. Five composite soil samples were taken, four from the corners and one from the center of sub-plots. Shannon-Wiener (H’) and Simpson (1-D) diversity indices were computed for woody species diversity and evenness. Similarities between the two sub-watersheds were calculated by Sorensen’s Similarity Coefficient (SSC). Mean comparison and one-way ANOVA were computed by R version 3.6.1 software. A total of 51 woody species representing 23 families were identified across the two studied sub-watersheds. Out of the total 51 species, 32(62.7%) were common to both sub-watersheds, while 13 (25.5%) and 6(11.8%) were unique to the conserved and non-conserved, respectively. Comparison of total woody species richness showed a significant difference (P saplings< adults. Total organic carbon stocks of conserved sub-watershed (348.64 t C ha-1 ) was higher compared to non-conserved sub watersheds (316.05 t C ha-1 ). Watershed conservation with SWC plays important role in diversity and valuable woody species protection and improve regenerations and soil organic carbon storage. Soil and Water Conservation (SWC) practices should be adopted in different scales of land managements

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COMPARATIVE ANALYSIS OF DIVERSITY, USES AND REGENERATION STATUS OF WOODY SPECIES, AND SOIL ORGANIC CARBON STOCK OF CONSERVED AND NON-CONSERVED DIKICHA SUB-WATERSHEDS: BORANA ZONE, SOUTHERN E

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