The dryland area in Ethiopia covers a substantial region endowed with diverse plant resources. However, the landmass has received less attention even if it has high ecological, environmental, and economic uses. The present study was conducted in Hirmi woodland vegetation, which is one of the dryland areas in Ethiopia, with the objective of investigating the floristic composition, plant community types, vegetation structure, community-environment relations and its regeneration status. Vegetation and environmental data were collected from 80 sampling plots with a size of 25 m × 25 m designated as the main plots. Diameter at breast height (DBH), height, basal area, density, vertical structure, importance value index (IVI), and frequency were computed. Species diversity and evenness were analyzed using Shannon diversity and evenness indices. The plant community types and vegetation-environment relationships were analyzed using classification and ordination tools, respectively. A total of 171 vascular plant species belonging to 135 genera and 56 families were recorded. About 5.3% of the species were endemic and near-endemic to Ethiopia. The highest number of species was recorded in families Fabaceae (16.4%) and Poaceae (11.7%) followed by Asteraceae (7.0%), Combretaceae, Lamiaceae, and Moraceae (3.5% each). Five plant communities were identified. According to the results from ordination analysis, the floristic composition of these plant communities was significantly affected by altitude, slope, sand, silt, soil organic matter, total nitrogen, and disturbance. The vegetation structure reveals that a large number of individual species was categorized in the lower DBH, frequency, and height classes. The highest Shannon diversity index and evenness values of the study area were 4.21 and 0.95, respectively. Anogeissus leiocarpa, Combretum hartmannianum, Ziziphus mucronata, Terminalia macroptera, and Acacia polyacantha were the species with high IVI. Some endemic plants were in the IUCN red list categories of Ethiopia and Eritrea. The overall regeneration status of the study area was poor because of anthropogenic disturbances and grazing pressures. Although the study area is endowed with high plant species diversity including endemism, it is under poor regeneration status due to various disturbances. To overcome this challenge, integrated management measures including monitoring and application of restoration techniques by taking into consideration the significant environmental factors associated with species diversity as well as observed regeneration status and IUCN threat level of the species are highly recommended.

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埃塞俄比亚北部提格里地区赫米林地植被的生态和植物学研究

埃塞俄比亚的干旱地区覆盖了一个拥有丰富植物资源的重要地区。但是，即使其具有较高的生态，环境和经济利用价值，也很少受到关注。本研究在埃塞俄比亚干旱地区之一的赫尔米林地植被中进行，旨在调查植物区系组成，植物群落类型，植被结构，群落与环境的关系及其更新状况。从80个样地25 m×25 m被指定为主要样地的80个样地中收集了植被和环境数据。计算了乳房高度（DBH）的直径，身高，基础面积，密度，垂直结构，重要性值指数（IVI）和频率。使用香农多样性和均匀度指数分析了物种多样性和均匀度。分别使用分类和排序工具分析了植物群落类型和植被-环境关系。总共记录了171个维管植物物种，它们属于135属56个科。大约5.3％的物种是埃塞俄比亚的特有种和近特有种。记录最多的物种是Fabaceae（16.4％）和Poaceae（11.7％）家族，其次是Asteraceae（7.0％），Combretaceae，Lamiaceae和Moraceae（各占3.5％）。确定了五个植物群落。根据排序分析的结果，这些植物群落的植物组成受到海拔，坡度，沙土，淤泥，土壤有机质，总氮和干扰的显着影响。植被结构表明，许多单独的物种被归类于较低的DBH，频率，和身高课。研究区的最高香农多样性指数和均匀度值分别为4.21和0.95。IVI较高的物种是黑穗香诺（Anogeissus leiocarpa），哈尔曼香菇（Combretum hartmannianum），酸枣（Zipziphus mucronata），大榄仁（Terminalia macroptera）和洋槐（Acacia polyacantha）。一些特有植物在埃塞俄比亚和厄立特里亚的自然保护联盟红色名录中。由于人为干扰和放牧压力，研究区域的总体再生状况很差。尽管研究区拥有丰富的植物物种多样性，包括地方特有种，但由于各种干扰，它处于较差的再生状态。为了克服这一挑战，