Woody species composition and structure of Kuandisha afromontane forest fragment in northwestern Ethiopia

作     者：Abiyot Berhanu Sebsebe Demissew Zerihun Woldu Motuma Didita 

作者机构：Department of Plant Biology and Biodiversity ManagementAddis Ababa UniversityP.O.Box 1176Addis AbabaEthiopia Forest and Rangeland Plants Biodiversity DirectorateEthiopian Biodiversity InstituteP.O.Box 30726Addis AbabaEthiopia 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2017年第28卷第2期

页      面：343-355页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：funded by the Ethiopian Biodiversity Institute Community Based Integrated Natural Resources Management(CBINRM)project grant 

主　　题：vegetation woody shrub richness liana diverse basal disturbance Species habit 

摘      要：To investigate the woody species composition,diversity and structure of Kuandisha Afromontane forest,vegetation and environmental data were collected from 53 plots of 10 m 9 50 m for trees and shrubs and 265 subplots of 2 m 9 4 m for seedlings were laid along eight transect lines. The local name, scientific name, abundance,DBH, height and percentage foliage cover of species were recorded. Environmental variables, namely altitude, latitude and longitude as well as disturbance levels were also recorded in each plot. Structure, basal area, importance value index（IVI） and species prioritization were analyzed using spreadsheet programs. Correlation coefficients, frequency, relative frequency, Shannon diversity index,Shannon evenness and vegetation classification were analyzed using an R package. Sixty-six species belonging to40 families were recorded. Fabaceae was the most diverse family consisting of seven species, followed by Euphorbiaceae and Asteraceae. In terms of habit, 29 species were trees, 28 were shrubs, and 9 were lianas. The overall Shannon diversity index was 2.5. The frequency and relative frequency of woody species with DBH C2.5 cm ranged from 1.9 to 92.5 and 0.1 to 5, respectively. Seedling density varied among species ranging from five to 9938 individuals ha-1. The total basal area of woody species having DBH C2.5 cm is 15.3 m2ha-1. The IVI of species ranged from 0.13 for Solanum giganteum Jacq. to 28.4 for Croton macrostachyus Del. The woody vegetation was classified into five community types. Species richness,diversity and evenness of communities were strongly positively correlated. On the other hand, the correlation between disturbance and seedling density, and species richness was strongly negative. Thus, among the recorded woody species, a significant portion was either lacking regeneration or selectively removed for various *** lack of seedlings of those species is mainly attributed to anthropogenic disturbances particularly free grazing.