Composition and Structure of Woody Vegetation in Community Compared to State Forests in Tehuledere District, South Wollo, Ethiopia

Abstract

ABSTRACT Restoring the degraded areas with vegetation cover is an optimal strategy to mitigate land degradation. The objective of this study was to examine the composition and structure of woody vegetation in community and state forests in Tehuledere District, South Wollo, Ethiopia. The vegetation data were collected by sampling a total of 40 systematically laid sample plots (i.e. 20 samples in each forest type) and analyzed to determine woody species composition (i.e. number of species, frequency, density, dominance, and importance value index) and forest structure (i.e. diameter distribution, basal area, and biodiversity index). The vegetation structure was described by diameter class using inverse J-shaped as this type of distribution considered being indicative of a stable population structure or good regeneration status. The results revealed that significantly greater densities of seedlings and saplings were found in the community forest than that of the state forest. Moreover, a total of 45 woody species, representing 29 families were recorded in this forest. However, 29 woody species, representing 25 families were only found in the state forest, suggesting that 25 woody species were common in both forest types. However, 20 woody species were found only in the community forest, whereas only three species were exclusively obtained in the state forest. Woody plant densities were 10,881 and 9,501 individuals’ ha−1 in community and state forests, respectively. The result suggested that Juniperus procera was the most dominant species in both forest types. The community forest had a diversity value of 2.26, while the corresponding value for the state forest was only 2.07. Overall, as compared to the state forest, the community forest had a better status in several biological parameters. Generally, the results emphasize the importance of the relative advantage of the community forestry approach to restore, enhance, and maintain (e.g. enrichment planting, pruning, and selective cutting) the forest resources over the conventional or protectionist way of the state forest management. Therefore, intervention for legal framework and institutional development particularly through formal recognition of people’s ownership and right over the conservation management of forests is essential toward sustainable forestry.