Kassahun Achamyeleh Anteneh, Abate Dagim Fikir, Belete Dessie Assefa
University of Gondar, College of Agriculture and Environmental Sciences, Gondar, Ethiopia.
Bahir Dar University, College of Agriculture and Environmental Sciences, Bahir Dar, Ethiopia.
Heliyon. 2024 Sep 19;10(18):e38155. doi: 10.1016/j.heliyon.2024.e38155. eCollection 2024 Sep 30.
Ethiopia Province has diverse forest resources. However, it has decreased over time, leaving the country's forest with only remnant patches. Therefore, the present study was conducted to examine the species composition, structure and regeneration status of woody plant species along disturbance gradients. To collect the data, the forests were first stratified into low disturbed (LD), moderately disturbed (MD) and heavily disturbed (HD) groups based on information from reconnaissance site visits and consultations with key informants. Three transect lines were laid systematically 200 m apart, and rectangular plots 10 m∗20 m (200 m) in length were laid at 50 m intervals along each transect, for a total of 27 plots. The DBH and height of all woody individuals with ≥5 cm and ≥2 m were measured. Seedling and sapling data were recorded in four subplots of 2 m∗5 m (10 m) respectevly in the opposite corner of the main plot. Woody species density, richness, evenness, diversity, frequency and IVI were determined for each disturbance class, and one-way ANOVA and mean comparison tests were used to examine significant differences among disturbance classes. A total of 37 woody species and 27 families were recorded. Based on structural analysis, only Croton macrostachyus exhibited an inverted J shape. It is concluded that woody species composition was affected by human disturbance. Therefore, a concentrated form of forest conservation should be established to protect against excessive human disturbance.
埃塞俄比亚省拥有多样的森林资源。然而，随着时间的推移，其森林资源有所减少，该国的森林仅剩下残余斑块。因此，开展了本研究以调查沿干扰梯度的木本植物物种的组成、结构和更新状况。为收集数据，首先根据实地勘查信息以及与关键信息提供者的磋商，将森林划分为轻度干扰（LD）、中度干扰（MD）和重度干扰（HD）组。系统地设置了三条间距为200米的样线，并且沿着每条样线每隔50米设置长10米×20米（200平方米）的矩形样地，共计27个样地。测量了所有胸径≥5厘米且树高≥2米的木本个体的胸径和树高。在主样地对角的四个分别为2米×5米（10平方米）的子样地中记录幼苗和幼树数据。确定了每个干扰等级的木本物种密度、丰富度、均匀度、多样性、频度和重要值，并且使用单因素方差分析和均值比较检验来检验干扰等级之间的显著差异。共记录了37种木本植物和27个科。基于结构分析，只有大戟科大戟呈现倒J形。得出的结论是木本物种组成受到人类干扰的影响。因此，应建立集中的森林保护形式以防止过度的人类干扰。
