维普中文期刊产品整合服务

Assessment of natural regeneration status and diversity of tree species in the biodiversity conservation areas of Northeastern Bangladesh

查看全文 作　　者：Md. Habibur [1]Rahman;Md. Abu Sayed Arfin [1,2]Khan;Bishwajit [1]Roy;Most. Jannatul [1]Fardusi 高影响力作者 机构地区：[1]Department of Forestry and Environmental Science, School of Agricul- ture and Mineral Sciences, Shahjalal University of Science and Tech- nology, Sylhet-3114, Bangladesh;[2]Department of Disturbance Ecology, University of Bayreuth, Bayreuth, Germany高影响力机构 出　　处：《Journal of Forestry Research》索引2011年第22卷第4期,共9页高影响力期刊 摘　　要：A study was conducted at two-biodiversity conservation areas of Northeastern Bangladesh (a part of Sylhet Forest Division) to assess the species composition, diversity and density of natural regeneration of tree species both indigenous and exotic species. Data were collected by stratified random quadrate method during January 2010 to July 2010. Totally 200 circular plots of 2 m×2 m in size had 5 different habitat types of plants namely; forest, roadside, homestead (surrounding forest dwellers house), fallow land and others (canals, streams and tea gardens side), which included a total of 55 regenerating species belonging to 28 families. Meliaceae is the dominant family and shows the highest family importance value (26.3), having six species, followed by Moraceae (24.24). Among the five habitat types, forest (43 species) possess the highest number of species, followed by roadside (23 species). Total 15 exotic species among 9 families and 40 indigenous species with 24 fami- lies were recorded. For exotic species, Tectona grandis possess the high- est relative density (11.7%) and relative frequency (10.5%); Senna sia- mea had highest relative abundance (7.83%). In case of indigenous spe- cies, Chickrassia tabularis possess the highest relative density (4.23%) and relative frequency (4%); Dipterocarpus turbinatus had the highest relative abundance (3.92%). Tectona grandis (29.66) and Chickrassia tabularis (10.8) had the highest IVI for exotic and indigenous species respectively. Different diversity indices such as Shanon-Winner diversity index, species diversity index, species richness index, species evenness index, Simpson index and species dominance index, etc. were applied to quantify definite diversity. The regeneration of species associated with low levels of disturbance was in the exotic species. Study suggests that proper protection from human disturbances and scientific management ofnatural regeneration of two-study forests may lead a rich biodiversity site in the country. 关 键 词：树种多样性 生物多样性 天然更新 孟加拉国 保护区 东北部 评估 物种多样性指数
相关文献

参考文献(52)

引证文献(2)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费