Diversity and regeneration status of woody species in Tara Gedam and Abebaye forests, northwestern E

来源 :林业研究(英文版) | 被引量 : 0次 | 上传用户:mybestlove_nx
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A study was conducted in Tara Gedam and Abebaye forests 1,northwestern Ethiopia to investigate the diversity, regeneration status,socio-economic importance and the factors causing destruction of theforests. A total of 30 plots, measuring 20 m x20 m, were establishedalong line transects laid across the forests. Participatory Rural Appraisal(PRA) method was employed to generate the socio-economic data. Pri-mary data were collected by field observation, semi-structured interviewwith key informants and discussion with relevant stakeholders. A total of143 woody species belonging to 114 genera and 57 families were re-corded, and of all the species 44 (30.8%) were trees, 57 (39.9%)trees/shrubs, 33 (23.1%) shrubs and 9 (6.3%) lianas. The diversity andevenness of woody species in Tara Gedam forest are 2.98 and 0.65, re-spectively, and in Abebaye forest they are 1.31 and 0.31, respectively.The total density and basal area of woody species in Tara Gedam forestare 3001 individuals.ha·ha and 49.45 m, re-spectively. The results on the importance value index (IVI) and DBHclass distributions suggest that the species with low IVI value and poorregeneration status need to be prioritized for conservation. In thesocio-economic survey, the responses from the key informants indicatedthat the forests are the major sources of fuelwood (90%), constructionmaterial (80%), timber (75%) and farm implements (55%). The forestsare also sources of medicines, animal fodder, bee forage and edible fruits.Tara Gedam monastery, assisted by the local people who have strongreligious belief and high respect to the monastery, has played a great rolein the maintenance of the sacred forest since a long time. At present, theconservation efforts are made jointly by the monastery and institutionsconcerned with conservation. The major factors that cause destruction of the forests are livestock grazing, tree cutting for various purposes andfarmland expansion. The implications of the results are discussed, and the recommendations are suggested for conservation, management andsustainable utilization of the forest ecosystems.
其他文献
《帕美勒》是 18世纪英国小说家塞缪尔·理查逊的著名小说。该书不仅以书信体形式为当时的小说开创了一个新的写作模式 ,而且其女主人公帕美勒的命运也引起了很多评论者的兴
通过文献资料的查阅 ,在论述了中国古代竞技体育的表现形式及特点基础上 ,指出“农业文化、自然中庸的文化特色、专制的社会制度与形态、文化的早熟与继承性的文化传播途径”
进入7月,辽宁省肉羊活畜市场收购价上涨,交易量也小幅上涨。辽宁绒山羊活畜交易价格整体小幅上涨,市场交易量平稳。
星天牛在北方地区每两年发生一代,以幼虫形式在木质部蛀道内越冬,次年3月下旬越冬幼虫开始活动,5月下旬至6月下旬幼虫开始化蛹,6月下旬成虫开始羽化,7、8月份进入产卵盛期.通
选用1日龄艾维因肉仔鸡504只,随机分为9组,每组4个重复,每重复14只鸡(公母各半),采用3×3(Fe×VA)完全随机试验设计,探讨肉仔鸡体内Fe与VA的互作效应.试验日粮铁的添加量为0,
采用农业行业标准NY/T761-2008检测方法,用气相色谱仪对福州市3家超市和3家农贸市场销售的16个蔬菜品种共60份样品进行有机氯及拟除虫菊酯类农药残留的检测,并根据GB2763 - 2
夏季如果对怀孕母畜饲养管理不当,很容易导致胎儿的生长发育受阻,甚至引起流产和发病。因此,夏季要特别注意加强怀孕母畜的饲养管理,
Wheat, one of the most important food crops, has been extensively studied with respects to plant regeneration and transformation employing the immature embryos
本文从钟敬文先生对民族文化的基于民间文化的整体把握、对各民族民间文化的关注以及对藏族文化的特殊关注三方面 ,对先生的民族文化学思想进行了初步的梳理 ,揭示出先生建设
汉《公莫舞》声辞杂写 ,不可解读达千五百年之久 ,经逯钦立声辞分流研究 ,为解读及深入研究奠定基础。杨公骥首议它是现存最早的舞剧剧本 ,赵逵夫续有细说。也有异议。文体定