安徽查湾自然保护区甜槠林林隙森林物种多样性研究  

Species Diversity of Gaps in Castanopsis eyrei Stands in Zhawan Naturel Reserve of Anhui Province,China

作　　者：江国华 吴泽民[2] 

机构地区：[1]安徽宣城职业技术学院,安徽宣城242000 [2]安徽农业大学林学与园林学院,合肥230036

出　　处：《林业资源管理》2011年第4期94-101,共8页Forest Resources Management

基　　金：国家"十一"五科技支撑项目(2006BAD03A06)

摘　　要：采用样线法调查研究区内林隙分布,共获得36个林隙,大小不同林隙内植物种类组成表现出一定差异,大林隙（300~400m2）乔木树种18种,灌木、草本植物28种;小林隙（〈100m2）乔木树种13种,中林隙（100~200m2）11种,两者灌木及草本植物均21种。大、中林隙内乔木树种以江南桤木居多,小林隙中暖木和甜槠占优势;3个林隙中灌木均以青栲幼苗占绝对优势,表明青栲将有可能进入林冠层而逐渐成为优势树种。林隙内乔木树种种数、丰富度指数均大于非林隙,均匀度小于非林隙;灌木、草本植物具有同样规律。乔木树种物种多样性以大林隙最高、中林隙最低;不同面积林隙SW多样性指数、均匀度指数依次为：大林隙〉中林隙〉小林隙;生态优势度为：中林隙〉大林隙〉小林隙。灌木、草本植物物种数、丰富度指数表现出300~400m2面积的大林隙内达最大值,并随林隙面积的减小而减小,灌、草层植物多样性最大值也出现在大林隙中;生态优势度指数中林隙最大,小林隙最小。By using a line sampling a total of 36 gaps were measured in the coumunity of Castanopsis eyrei in the nature reserve area of Zhawan located in south Anhui Province.The gaps were classified into three types based on it area,large gap with area of 300m2~400m2,middle 100m2~200m2 and small 100m2.5 samples of（4×4m2） were set for each type of gaps and under canope,and results of sample investigation showed that there were 18 tree species in large gap,11 in middle and 13 in small one;for understory species there are 28 in big gap,21 in both middle and small one respectively.Based on species of important value,Alnus trabeculosa was listed at first in both big gap and middle one,but Meliosma veitchiorum and Castanopsis eyrei were at top in small gap;young seedling of Cyclobalanopsis myrsinaefolia and herb species Woodwardia japonica are dominant in understory in the 3 gaps of different size.This indicated that Cyclobalanopsis myrsinaefolia could grow up into canopy layer and will be dominant species in future.Both of the number of tree species and richness in gaps was higher than that in non-gap,but ecological evenness in gap was lower compared to that in non-gap,Its similar to shrub herb species.Species diversity of tree species was the highest in gaps of 300~400m2 and the lowest in that of 100~200m2.SW diversity index and evenness index for different gaps could be list in order as the follows：big gap middle gap small gap,for ecological dominance：middle gap big gap small gap.The species richness of the shrub tree and herb species was listed at top in gaps of 300~400m2,and in the smaller gap area the richness could be lower.The species diversity for both shrub herb species was at top in big gap,and ecological dominance index was the lowest in small gaps,but the highest in middle gaps.

关 键 词：林隙 物种多样性 甜槠林 安徽查湾 

分 类 号：S718[农业科学—林学]