摘要
分别测定了滇中地区两类代表性群落即高原水平带上的半湿润常绿阔叶林和山地垂直带上的中山湿性常绿阔叶林的树种多样性 (Shannon -Wiener指数H ,Simpson指数D和α指数 ) ,并进行了比较研究。结果表明 ,中山湿性常绿阔叶林的树种多样性 (H =2 .53± 0 .1 4 ;D =1 1 .76± 2 .85;α =8.1 2± 1 .72 )远高于半湿润常绿阔叶林 (H =1 .52± 0 .35;D =3.88± 1 .90 ;α=3.4 4± 1 .31 )
Semi_moist evergreen broad_leaved forest(SEBF) and middle mountain moist evergreen broad_leaved forest (MEBF) represent two kinds of climax vegetation in central Yunnan.This paper examines their tree species diversity by determining the indices of Simpson's D,Shannon_Wiener's H and Fisher's α.We compared SEBF with MEBF through rescaled distance clustering,rank/abundance analysis and the distribution of stem DBH classes.The results show that the tree species diversity of MEBF(H=2.53±0.14;D=11.76±2.85;α=8.12±1.72)is significantly higher than that of SEBF(H=1.52±0.35;D=3.88±1.90;α3.44±1.31),and MEBF maintains more complex community structure.As regard to Shannon_Wiener's H,the MEBF in Yunnan is more diversified in the tree species composition that the evergreen broadleaved forests in the middle subtropics of the eastern China,but less diversified than some mountain evergreen broad_leaved forests in Dinghushan Reserve and some insular evergreen broad_leaved forests in Ryukyu,Japan,similar to some lowland evergreen broad_leaved forests in Dinghushan Reserve.The tree species divesity of the SEBF is obviously at a low level ,this can be attributed to the plateau environment in which it is distributed.On the other hand,excessively man_made disturbance makes pronounced impact on the tree species composition of SEBF.More attention to the protection of the SEBF in Yunnan should be paid.
出处
《山地学报》
CSCD
2000年第4期322-328,共7页
Mountain Research
基金
中国科学院九.五重大项目!(KZ951 -A1 -1 0 4 )
关键词
常绿阔叶林
树种多样性
中山
云南
Evergreen broad_leaved forest
tree species diversity
Mid_runnan plateau
middle mountain
