Mekonnen Amare Bitew, Wassie Wubetie Adnew
Bahir Dar University, Department of Biology, Bahir Dar, Ethiopia.
Scientifica (Cairo). 2023 Apr 20;2023:4061029. doi: 10.1155/2023/4061029. eCollection 2023.
The study was conducted in a historian Wonjeta St Michael Church Forest, believed to be constructed in 11 century in Northwestern Ethiopia. The composition, structure, and management of this forest is not documented. Fifty plots of 20 m × 20 m (400 m) were laid along five-line transect for vegetation data collection. In addition, 5 m × 5 m subplots were laid within the main plot to sample seedlings and saplings. All plots were laid at a distance of 50 m along the transect lines. The diversity and population structure of woody individuals of trees and shrubs with a diameter at breast height (DBH) ≥ 2.5 cm and height ≥2 m were measured, and DBH <2.5 cm and height <2 m were counted as seedlings and saplings. All trees and shrubs recorded in the 50 plots were used for vegetation structure analysis. A total of 65 woody plant species in 53 genera and 33 families were recorded. Out of the total number of species, three were found to be endemic to Ethiopia. The family Fabaceae had the highest number of species, followed by Moraceae, and then Euphorbiaceae with 14, 6, and 4 species, respectively. The results of Shannon Wiener diversity and evenness indices of woody species were 2.8 and 0.68, respectively. Woody species densities for mature individuals were 2,202.5 stems ha, seedling 2419.2 stems ha, and sapling 1737.6 stems ha. Priority for conservation should be given using population structure, important value index, and regeneration status as criteria. Results of the structural analysis revealed that the Forest is highly dominated by small-sized trees and shrubs indicating that it is in the stage of secondary development and there are species that require urgent conservation measures.
该研究在历史学家温杰塔圣迈克尔教堂森林中进行，据信该森林建于11世纪，位于埃塞俄比亚西北部。这片森林的组成、结构和管理情况尚无文献记载。沿着五条样线设置了50个20米×20米（400平方米）的样地用于收集植被数据。此外，在每个主要样地内设置了5米×5米的子样地用于对幼苗和幼树进行采样。所有样地沿样线每隔50米设置一个。测量了胸径（DBH）≥2.5厘米且树高≥2米的树木和灌木木质个体的多样性和种群结构，胸径<2.5厘米且树高<2米的个体被计为幼苗和幼树。对50个样地中记录的所有树木和灌木进行植被结构分析。共记录了33科53属的65种木本植物。在所有物种中，发现有3种是埃塞俄比亚特有的。豆科的物种数量最多，其次是桑科，大戟科分别有14种、6种和4种。木本物种的香农-维纳多样性指数和均匀度指数结果分别为2.8和0.68。成熟个体的木本物种密度为每公顷2202.5株，幼苗为每公顷2419.2株，幼树为每公顷1737.6株。应以种群结构、重要值指数和更新状况为标准确定保护优先级。结构分析结果表明，该森林以小型树木和灌木为主，表明它处于次生发育阶段，有一些物种需要采取紧急保护措施。
