摘要
TWINSPAN将山西关帝山神尾沟 89个群落样方划分为 2 3组 ,即 2 3个群系。 DCA排序结果表明 :第一轴、第二轴及排序图对角线分别反映各植物群落所在环境的湿度、温度和海拔梯度变化。DCA二维排序图分布格局表明 :活土厚度、枯枝落叶层厚度与海拔之间有极明显的正相关性。不同海拔各样地指数散点图表明 :群落多样性和均匀度指数随海拔升高呈下降趋势 ,丰富度指数基本保持不变。
samples are divided into 23 groups by TWINSPAN (23 formations).DCA ordination diagram showed,the first axles,second axles and opposite angle of ordination plot reflect humidity,temperature and elevation of environment gradients of plant communities.Distribution pattern of samples on DCA ordination map showed,litters,depth of soft soil and elevation are positively correlated with each other.Species biodiversity for each index of different elevation illustrated that:community diversity and evenness index decreased with elevation increase.Species richness didnt change significantly.
出处
《西北植物学报》
CAS
CSCD
2000年第4期638-646,共9页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家攻关项目!( 96-0 0 4 -0 5-0 3 )
山西省自然科学基金!( 991 1 0 0 )资助
