作 者：
朱登强;王军辉;张守攻;张建国;茹广欣;罗大庆;潘刚
单 位：
西藏农牧学院;河南农业大学;中国林业科学院
关键词：
急尖长苞冷杉林;物种丰富度;α多样;β多样性;群落结构
摘 要：
沿海拔梯度3600～4300m设置8个样地,对西藏色季拉山西坡急尖长苞冷杉林的物种组成、物种丰富度、Shannon-Wiener指数(H′)、均匀度指数(E)、Jaccard指数(Cj)、Cody指数(βc)和群落结构沿海拔梯度的变化进行比较研究。结果表明:(1)在调查的8个急尖长苞冷杉林样地内共有植物58种,分属于36科53属,其中植物较多的科有蔷薇科8种、百合科5种、杜鹃花科5种、毛茛科3种、菊科3种、柏科2种、忍冬科2种、伞形科2种,其余的28科各只有1个种;(2)物种科、属、种数、Margalef指数(DM)与海拔存在显著的负相关性(P<0.05),在分布急尖长苞冷杉最低海拔3600m处出现物种丰富度的最大值;(3)多样性指数(H′)与海拔之间有极显著的负相关性(P<0.01),并且在3700～4100m之间多样性指数(H′)保持稳定;均匀度指数(E)与海拔梯度之间存在负相关性,但不显著;(4)Jaccard指数(Cj)在海拔3600～4100m随海拔的升高而升高,在生境过渡带的4100～4200m之间Jaccard指数(Cj)较低;Cody指数(βc)随海拔的升高呈下降的趋势,但在4000～4100m和4200～4300m海拔区间出现2个低谷;(5)最大树高(Hmax)和最大胸径(DBHmax)与海拔之间存在显著负相关性(P<0.05);胸高断面积之和(BA)和立木密度(N)与海拔之间存在负相关性,但不显著。
译 名：
Changes in Species Diversity and Community Structure of Abies georgei var.smithii Forest Along Altitudinal Gradients on the Western Slope of Sejila Mountain in Tibet
作 者：
ZHU Deng-qiang1,2,WANG Jun-hui1,ZHANG Shou-gong1,ZHANG Jian-guo1,RU Guang-xin2,LUO Da-qing3,PAN Gang3(1.Research Institute of Forestry,Key Laboratory of Tree Breeding and Cultivation,State Forestry Administration,CAF,Beijing 100091,China;2.Forest and Horticulture College of He’nan Agriculture University,Zhengzhou,He’nan 450002,China;3.Research Institute of Tibet Plateau Ecology,Linzhi,Tibet 860000,China)
关键词：
Abies georgei var.smithii;species richness;α diverse;β diverse;community structure
摘 要：
Changes in species diversity,species richness,Shannon-Wiener index(H’),Evenness index(E),Jaccard(Cj),Cody index(βc)and community structure of Abies georgei var.smithii forest on the western slope of Sejila Mountain in Tibet using data from 8 plots,which were investigated along an altitudinal gradient from 3 600 m to 4 300 m.Major results were summarized as follows:(1) A total of 58 tree species from 53 genera in 36 families among which 8 species were Rosaceae,5 species were Liliaceae,5 species were Eriaceae,3 species were Ranunculaceae,3 species were Compositae,2 species were Cupressaceae,2 species were Caprifoliaceae,2 species were Umblliferae,and other 28 tree species were only one receptively.These were recorded in the 8 plots of the A.georgei var.smithii forest;(2) Number of families,genera,species and Margalef index correlated negatively with altitude(P<0.05),with a peak at 3 600 m.(3) Shannon-Wiener index(H’) correlated negatively with altitude(P<0.01),and maintained stable at the altitudes between 3 700～4 100 m,evenness(E)with altitudes,however,this trend was insignificant.(4) Jaccard index increased sharply with increasing altitude at the altitudes between 3 600～4 100 m,and was lower between different vegetation types at the altitudes between 4 100～4 200.Cody index(βc) decreased with an increasing altitude,but there were 2 troughs between 4 000～4 100 m and 4 200～4 300 m.(5) Maximum tree height(Hmax) and Hmax(Hmax=37 m)correlated negatively with altitude(P<0.05);but basal area(BA)and BAmax(BAmax=5.3 m2) correlated with altitudes,however,this trend was insignificant.
