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Species composition, stand structure, and regeneration status of tree species in dry Afromontane forests of Awi Zone, northwestern Ethiopia
Ecosystem Health and Sustainability ( IF 4.2 ) Pub Date : 2019-09-23 , DOI: 10.1080/20964129.2019.1664938
Getaneh Gebeyehu 1 , Teshome Soromessa 1 , Tesfaye Bekele 2 , Demel Teketay 3
Affiliation  

Species composition, structure, and regeneration status of trees were assessed in five dry Afromontane forests. In each of the forests, trees having ≥5 cm diameter at breast height were identified and measured in 80 quadrats (20 × 20 m2). We compared tree species composition and similarities, stem densities, frequencies, basal area and importance value index of trees. Harvesting index was calculated to 13.3% in the least disturbed and 22.5% in highly disturbed forests. A total of 1,655 individuals representing 38 species and 28 families were recorded. The tree densities varied from 364.1 to 664.1stem ha−1 with an average basal area of 20.7 m2 ha−1. The analysis showed significant differences in basal areas of tree species between the least and highly disturbed forests. Seedling densities ranged from 2000 to 8162.5 stem ha−1 and sapling densities ranged from 512.5 to 2562.5 stem ha−1. The anthropogenic disturbances revealed high degradation of population structure and regeneration statutes of the trees in the studied forest ecosystem. In conclusion, the study provided empirical results on the dominance, population structure, importance value and regeneration status of tree species, which would be instrumental for the development of successful rehabilitation strategies for the studied forests.



中文翻译:

埃塞俄比亚西北部阿维地区干燥的from桐林的物种组成,林分结构和树种更新状况

在五种干旱的Afromontane森林中评估了树木的物种组成,结构和再生状况。在每个森林中,确定并测量了80平方厘米(20×20 m 2)的胸高直径≥5 cm的树木。我们比较了树木的种类组成和相似度,茎密度,频率,基础面积和重要性值指数。受影响最小的地区的采伐指数计算为13.3%,严重受影响的森林的采伐指数为22.5%。总共记录了1,655个代表38种和28个科的个体。树木密度从364.1到664.1stem ha -1不等,平均基础面积为20.7 m 2 ha -1。分析表明,在受干扰最少的森林和受高度干扰的森林之间,树木物种的基础区域存在显着差异。幼苗密度在2000至8162.5茎ha -1范围内,树苗密度在512.5至2562.5茎ha -1之间。人为干扰表明所研究森林生态系统中树木的种群结构和再生法规高度退化。总之,该研究提供了关于树种的优势度,种群结构,重要性值和再生状态的经验结果,这将有助于制定成功的森林恢复策略。

更新日期:2019-09-23
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