Article Dans Une Revue Asian Journal of Research in Agriculture and Forestry Année : 2025

Comparison of the Trees Species Composition, Diversities and Soil Physicochemical Properties in Well– Drained and Poorly–Drained locations of Ukpon River Forest Reserve

Résumé

The differences in the distribution and abundance of plant species in any environment are therefore indications of the variation in biophysical components of the environment such as soil, water, topography among others. This study was aimed at examining the effects of soil variables on tree species composition in well-drained and poorly- drained locations in Ukpon River Forest Reserve. A random Sampling Technique was used to establish 8 plots of 50m×50m, with 4 in each of the selected sites. Data on Vegetation and soil samples were collected. Species composition, richness, evenness, dominance, relative density and Importance Value Index (IVI) of tree species were determined. Soil profiles were established and samples collected for soil properties analysis following the standard methods. Data were analyzed using descriptive statistics using SPSS software and PAST 4.0 version to compute for diversity indices. A total of 194 and 207 species belonging to 25 and 20 families were recorded for well-drained and poorly- drained sites respectively. The highest number of individual species of 44 was recorded in the family Leguminaceae at the well-drained site and 50 individual species recorded for the Meliaceae at the poorly- drained site. Tree families such as Ebenaceae, Francoaceae, Meliaceae and Myrtaceae were not present at the well-drained site while the families Leguminaceae and Bombaceae were well represented at the both locations. The Importance Value Index (IVI) revealed that Piptadeniastrum africana has the highest value of (15.63) and is the most dominant at the well-drained site while Entandrofragma Spp (30.18) is the most dominant at the poorly drained site. The values of 3.397, 18.406 and 2.260 for Shanon Weiner Index, species richness and evenness index, respectively, at the well-drained site were not significantly different (P>0.05) from 3.050, 20.674, and 2.168, respectively, at the poorly drained site. The physicochemical properties of soil in the study area showed that only silt, pH, and Na were significantly different (P<0.05) in the two sites. The species dominance and species richness were higher in soils with textural class of sandy-loam at the poorly drained site. The lower pH with higher organic carbon and available phosphorus at the well-drained site showed a higher evenness and diversity index. The study revealed that various soil variables and the topography of the sites had a relationship with tree species composition and distribution. Piptadeniastrum africana belonging to the family Fabiaceae and Entandropragma heudelotii belonging to the family Meliaceae are recommended for effective forest regeneration in well- drained and poorly- drained soils.

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Dates et versions

hal-05221364 , version 1 (25-08-2025)

Identifiants

  • HAL Id : hal-05221364 , version 1

Citer

Marceline Robertson Igiri. Comparison of the Trees Species Composition, Diversities and Soil Physicochemical Properties in Well– Drained and Poorly–Drained locations of Ukpon River Forest Reserve. Asian Journal of Research in Agriculture and Forestry, 2025, 11 (3), pp.350-362. ⟨hal-05221364⟩
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