长白山北坡植物群落β多样性分析

β多样性可用于分析不同生镜间的梯度变化。应用Cody指数对长白山北坡不同海拔群落的β多样性的测度表明，Cody指数可以较好地反映群落间的关系，β多样性较大的几个峰值恰好是不同植被类型间的分界。不同取样面积下对群落β多样性的测度瑶明，群落间的β多样性随取样面积的扩大而下降，但并不是简单的线性下降，64m^2是取样面积的一个临界尺度，大于或小于这一取样面积，其结合会有较大差异。群落间的β多样性随群落间海拔差的增加而增大。海拔差为800m和1200m是两个明显的尺度界限，海拔差大于或小于这两个界限，群落间会有质的不同。

Analysis on β diversity of plant communities on northern slope of Changbai Mountain

diversity means the diversity between two communities,which is often used to analyze the gradient variation on environment.It reflects species replacement along environmental gradient,and it is more useful while there exists obvious ecological gradient in the research region.Changbai Mountain is very famous for its obvious altitutional vegetation type such as broadleaved Korean pine forest,dark coniferous forest,Ermam's birch forest,and tundra on the north slope.In this research,an altitutional treasect was...