不同人为干扰强度对米槠林乔木层组成和物种多样性的影响  

THE EFFECTS OF DIFFERENT ARTIFICIAL DISTURBANCE ON THE FLORA AND SPECIES DIVERSITY OF TREE LAYER IN CASTANOPSIS CARLESIS FOREST IN WUPIN, FUJIAN

作　　者：游水生[1] 

机构地区：[1]福建农林大学林学院,南平353001

出　　处：《林业科学》2001年第z1期106-110,共5页Scientia Silvae Sinicae

基　　金：福建省自然科学基金资助项目 (C940 0 5 )

摘　　要：本文从乔木层组成和物种多样性角度探讨不同人为干扰强度 (天然米槠林CK、A级择伐更新、B级皆伐迹地天然更新、C级皆伐迹地人工促进天然更新和D级杉木林 )对福建武平米槠林恢复的影响。结果表明 :CK、A级和B级乔木层都是以米槠为优势种 ,C级顶极种米槠处于第 2优势种 ,阳性树种裂斗锥处于第 1优势种 ,而D级受人工种植的影响乔木层优势种发生根本性变化而以杉木为优势种 ;通过乔木层组成和物种多样性分析 ,随着人为干扰强度的加大种类组成、各科含种数、各科含属数和各属含种数上升到B级或C级后下降或直接下降 ,而物种多样性指数和均匀度呈线性下降、优势度呈线性上升。特别是D级杉木林乔木层由于以人工种植杉木为优势种控制着整个群落的性质和环境、导致分析的各方面指标与天然米槠林CK相距甚远 ,目前较难恢复到米槠顶极群落 。The effects of the different artificial disturbances on the flora of tree layer and species diversity in the restoration series (CK,the natural \% Castanopsis carlesii\% forest; class A,the regeneration by selected cutting;class B,the natural regeneration in clear\|cutting;area C,the artificial measures promoting regeneration and class D,Chinese fir stand) of the \%C.carlessi\% forest in Wuping, Fujian were studied. The results showed that the \%C. carlesii\% was the dominant species in the tree layer in CK, class A and class B;and the second dominant species in class C. The intolerant tree species \%C.fissa\% was the most dominant species in class C, and Chinese fir was the absolutely dominant in class D influenced by artificial plantation. Numbers of families,geneus and species; numbers of species in families, numbers of genera in families and numbers of species in genera were increased to B or C class and then dropped down gradually of directly with the increasing of disturbance intensities, while the indices of species diversity and the evenness decreased, the dominant index increased linearly. In class D, the indices were very different from those of natural \%C.carlesii\% forest because the dominant species\|Chinese fir, which affected the characters and environment of the community. The regeneration patterns except class D will be succeed back to the climax community of \%C.carlesii.\%

关 键 词：米槠林 不同人为干扰 乔木层组成和物种多样性 

分 类 号：S71[农业科学—林学]