西洞庭湖区杉-阔林下植物种类及物种多样性分析  

Undergrowth plant species and their diversity analysis in Cunninghamia lanceolata and broadleaf mixed forest in west Dongting lake area

作　　者：李际平[1] 赵春燕[1] 袁晓红[1] 郑柳[1] 蒋琼星 

机构地区：[1]中南林业科技大学,湖南长沙410004

出　　处：《中南林业科技大学学报》2012年第7期49-53,共5页Journal of Central South University of Forestry & Technology

基　　金：国家自然基金项目(30972362)

摘　　要：为了分析杉木类与阔叶类景观斑块间边缘效应,运用频度和盖度分析杉-阔间林下植物种类,运用植物种类数目和物种多样性指数分析杉-阔林物种多样性。结果表明:杉木类与阔叶类景观斑块间存在边缘效应,在杉-阔边缘区出现林下植物种类、物种丰富度和物种多样性均大于杉木类与阔叶类核心区,且边缘效应与龄组有关,幼龄组表现不明显,中龄组表现较强的正效应,成熟龄组景观斑块趋于稳定,边缘效应强度小于中龄组。In order to analyze edge effects of landscape patch in Cunninghamia lanceolata and broadleaf tree mixed forest, the undergrowth vegetation species were analyzed by using frequency and coverage methods, the species diversity of the mixed forest was investigated according to plant species number and plant species diversity index. The results show that in the C. lanceolata forest and broadleaf tree landscape patch there existed edge effect; in the marginal zone of the mixed, the values of undergrowth plant species, the species richness and species diversity were all greater than those in Chinese fir and broad leaved core zone, and the edge effect was related with tree age groups, the edge effect of young group was not obvious, the middle age group showed a strong positive effect, the mature age group of landscape patch tended stable, the effect intensity of mature age group was less than the middle age group.

关 键 词：林下植物种类 群落水平结构 物种多样性 边缘效应 西洞庭湖区 

分 类 号：S750[农业科学—森林经理学]