江西农业大学学报2018，Vol.40Issue(3)：533-544,12.DOI:10.13836/j.jjau.2018070
江西官山乐昌含笑群落组成、种群动态与自然择优
Species Composition,Population Dynamics and Natural Selection of Michelia chapensis Community in Guanshan Nature Reserve of Jiangxi Province
摘要
Abstract
Michelia chapensis is a species of state key protected plant ( ClassⅡ) . Three long?term monito?ring plots were established to carry out the research on the ecological characteristics of the community in Guan?shan National Nature Reserve. The species composition, community structure and population dynamics of the community were analyzed and evaluated based on systematic investigation.The results were as follows.(1)There were 121 species in the three plots,belonging to 43 families and 72 genera. The important value of M. chap?sensis generelly ranked the top,31.03,27.96 and 15.30 in the tree layer and 14.23,11.59 and 10.48 in the shrub layer respectively.(2) There were great similarities in vertical structure and diameter structure of the three plots.With the increase of the height and diameter,the ratio of M.chapsensis abundance decreased grad?ually.(3) The species diversity raised with the increase of plot area,and the Shannon?Wiener index of the tree layer increased by 96.5％,and that of the shrub layer increased by 78.0％.The index of species richness of the shrub layer was higher than that of the tree layer in all the plots.(4) The age structure of M.chapsensis population was in a pyramid?shape and the survey curve approached to Deevey?Ⅲ. These findings indicate that the M.chapensis population can regenerate well with great potential in the complicated community and e?volves through an obvious process of natural selection.关键词
群落组成/种群动态/乐昌含笑/物种多样性/自然择优/江西官山Key words
community composition/population dynamics/Michelia chapensis/species diversity/natural selection/Jiangxi Guanshan分类
农业科技引用本文复制引用
宋述灵,姚小华,余泽平,陈琳,林国江,杨清培..江西官山乐昌含笑群落组成、种群动态与自然择优[J].江西农业大学学报,2018,40(3):533-544,12.基金项目
国家财政部、环保部"全国生物多样性野外监测示范基地修缮项目"( 2014)和中央财政林业国家级自然保护区补助资金项目( 2015) Project supported by National Biodiversity Field Monitoring Demonstration Base Renovation Program of Ministry of Finance and Ministry of Environmental Protection (2014) and National Nature Reserve Subsidy Program of Ministry of Finance and State Forestry Administration ( 2015) （ 2014）
