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当前位置: 首页 > 文章 > 石栎次生林群落特征及多样性指数的尺度效应 中国农学通报 2019 (17) 25-31
Position: Home > Articles > 石栎次生林群落特征及多样性指数的尺度效应 Chinese Agricultural Science Bulletin 2019 (17) 25-31

石栎次生林群落特征及多样性指数的尺度效应

作  者：
郭孝玉;孔凡前;邓文平;欧阳勋志;刘苑秋
单  位：
福建省资源环境监测与可持续利用重点实验室
关键词：
常绿阔叶林;石栎;物种多样性指数;群落特征;庐山
摘  要：
天然次生林科学经营已成为中国森林提质增效的重要途径,而群落结构特征是次生林科学经营与保护的重要依据.笔者以庐山常绿阔叶林中的典型石栎次生林为对象,按照网格法建立100 m*100 m的大样地,对木本植物进行了调查统计,分析石栎次生林的群落结构特征、多样性指数及其尺度效应.结果表明:样地中共有木本植物162种,其中乔木层(胸径≥1 cm)104种,共5101棵;群落按重要值排序前3种植物依次为石栎、山苍子和檵木,按照相对优势度排序前3种分别为石栎、檵木和甜槠,依次占36.1%、14.3%和9.2%;庐山石栎次生林的物种多样性指数存在尺度依赖性,随样方尺度面积的增大,ShannonWiener多样性指数呈先明显增加后趋于稳定值,Evenness均匀性指数则呈先减少后趋于稳定,Simpson's-Dominance则出现最大值后再逐渐减少;当样地面积达4900 m~2时,石栎乔木层多样性指数基本处于稳定状态,而灌木层出现稳定值的尺度面积约2500 m~2.研究结果对亚热带常绿阔叶林区次生林的物种多样性调查、植被恢复与重建提供参考.
作  者：
Guo Xiaoyu;Kong Fanqian;Deng Wenping;Ouyang Xunzhi;Liu Yuanqiu;Fujian Provincial Key Laboratory of Resources and Environment Monitoring & Sustainable Management and Utilization;College of Resources and Chemical Engineering,Sanming University;Management Bureau of Mount Lu National Nature Reserve;College of Forestry,Jiangxi Agriculture University;
单  位：
Guo Xiaoyu%Kong Fanqian%Deng Wenping%Ouyang Xunzhi%Liu Yuanqiu%Fujian Provincial Key Laboratory of Resources and Environment Monitoring & Sustainable Management and Utilization%College of Resources and Chemical Engineering,Sanming University%Management Bureau of Mount Lu National Nature Reserve%College of Forestry,Jiangxi Agriculture University
关键词：
evergreen broad-leaved forest;;Lithocarpus glaber;;species diversity index;;community characteristics;;Mount Lu
摘  要：
Subtropical evergreen broad-leaved forest is one of important vegetation types in the world. Here we report preliminary results of community composition and structure, species diversity index and size effects of evergreen broad-leaved forest at Lushan Mountian. We established a 1 hm~2(100 m×100 m) Lithocarpus glaber forest permanent plot from September 2014 to June 2015. Following the standard census procedure of the China Forest Ecosystem Research Network(CFERN), all free-standing trees diameter at breast height(DBH)≥1 cm in the forest were mapped, tagged and identified to species. The wood plants were counted, and the community composition and scale effect of diversity index were analyzed by Spss 19.0 and biodiversity software.The results show that: the 162 species of woody plants were emerged, the tree layer(DBH≥1 cm) have 104 species. According to the rank of communities important value, the top 3 species were Lithocarpus glaber,Litsea cubeba and Loropetalum chinense; and according to the relative dominance of top 3 species were Lithocarpus glaber, Loropetalum chinense and Castanopsis eyrei, accounted for 36.1% 14.3% and 9.2%,respectively. The species diversity index were relied on scale size according to diversity index difference, the Shannon-Wiener diversity index was showed significantly increased and after stable value, the Evenness index was decreased first and then stabilized, Simpson's-Dominance appeared the maximum and then gradually decreased.For the secondary forest tree layer,αdiversity index appeared a stable value with sample size scale at4900 m~2, and the shrub layer maintained a stable value when size scale at 2500 m~2.

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