摘要
本文用目前各国学者广泛使用的一些数量分类和排序方法对黄土高原区的马衔山植物群落进行了分类和排序。所用方法包括多元等级分划分类（ＴＷＩＮＳＰＡＮ程序）、ＰＣＡ排序（ＯＲＤＩＮＡ程序）、ＲＡ和ＤＣＡ排序（ＤＢＣＯＲＡＮＡ程序）。研究结果表明可以把３２个样地分为两大类共７个群落类型：山地森林（１）山杨＋白桦群落，（２）青群落，（３）青＋白桦＋山杨群落，（４）山杨＋康定柳＋糙皮桦群落；山地灌丛（１）康定柳十糙皮桦群落，（２）糙皮桦＋黄毛杜鹃＋裂香杜鹃群落，（３）黄毛杜鹃十裂香杜鹃群落。它们的分布格局与海拔梯度密切相关。此外，本文还对所用方法的比较进行了讨论。
The plant colnmunities in the Maxian Mountain Forest Region were cla-ssified and ordinated using Two-way lndicator Species Analysis(TWINSPAN),PCA(Prinicipal Colnponents Analysis) ,RA(Reciprocal Averaging) and DCA(Detrended Correspondence Analysis). Thirty-two plant community samples are classified into seven formations and two vegetation types of h gher class.The classification results are:Ⅰ.Hill forest: (1)Form. Populus davidiana+Betula platyphylla (2) Porm. Picea wilsonii(3)Porm. Picca wilsonii + Bet-ula platyphylla + Populus davidiana (4) Form. Populus davidiana + Salix para-lesis+Betula utilis,Ⅱ. Hill shrub:(1)Form. Salix paraplesis+Betula utilis(2) Form,Betula utilis + Rhododendron rufum + Rhododendron anthopogonoides(3) Form. Rhododendron rufum + Rhododendron anthopogonoides.The first axis of DCA ordination reflected elevation gradient.The second axis was shade gradient.The methods used in this paper were compared and discussed.
出处
《植物生态学报》
CAS
CSCD
北大核心
1994年第3期271-282,共12页
Chinese Journal of Plant Ecology
关键词
黄土高原
植被
分类
排序
Classification
Ordination
Elevation gradient
Loess plateau
Vegetation
