FLORA SPECIES COMPOSITION AND DIVERSITY ACROSS LAND USE TYPES IN JIGAWA STATE, NIGERIA
2025
LAWAL, A.A. | JIMOH, S.O. | JIBO, A.U. | SALAMI, K.D. | GIREI, A.H.
This study examines the effects of land-use Types (LUT) on flora species (FS) diversity Jigawa’s Sahel savanna, Sudan savanna, and wetland ecosystems. Anthropogenic have driven extensive vegetation changes, reduced FS diversity and compromised ecosystem services. Field data were collected using stratified sampling across five established LUT One 100m×100m sample plot sample plots with three replicates were established across three ecosystems. Within each sample plot, tree species (TS) with a diameter at stump height (DSH) ≥ 5.0cm were measured, while shrubs were considered under subplots of 5m×5m. Seedlings and wildlings were considered under the micro-plots of 1m×1m. the following indices: Species evenness, diversity (H') and Richness (D) were used to calculate the ecological indices of the specie, while ANOVA was used to compare between the means across the LUT. A total of 41 TS representing 12 families were recorded. Dominant species such as Acacia sieberiana, Balanite aegyptiaca, and Hyphaenea thebaica recorded 2, 2, and 1 stems/ha respectively in each of the LUT across the ecosystems. Species like Acacia senegal dominate agroforestry plots with a frequency of 100%. Cymbopogon giganteus (448 stands/ha) and Crotalaria sp. (368 stands/ha) were the most abundant species in the Shrub and herbs across the eco-zones. The highest TS, shrubs and herbs evenness (1.21, 0.85 and 1.32), H' (1.24,1.00 and 2.43) and D (1.68, 1.52 and 2.01) respectively. The results inform conservation strategies and policy-making for mitigating biodiversity loss and ensuring ecological resilience in the face of land degradation.
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