Classification of typical degraded ecosystems at different stages of vegetation restoration:A case study in Xiaolangdi hilly areas,Henan Province,China
DIAO Yong-；Wang-Feng-Fei-；Fan-Wei-；Yan-Liang
1.Henan Agricultural University,450002;2.The Henan Academy of Forest Sciences,450003: Zhengzhou,China
Abstract：Based on the analysis of species diversity indices,altitude,slope,soil of the ecosystems in Xiaolangdi mountain region,the factors impacting degraded ecosystems were studied by the Principle Component Analysis(PCA).The restoration degree of vegetation in this region had been studied using cluster analysis in this paper.The models predicting the restoration stage was established using Discriminant analysis.The results show that: 1)the vegetation in this areas can be divided into 15 communities,according to plant life-form,trees,shrubs,herbs have 4,6 and 5 types respectively.2)soil,landform and soil erosion have big load.The diversity indexes,including H′,D1,P,Jsw, D2 have higher contributing rate to the first principal component.The stone amount in soil has only lager load on the second principal component.Erosion and soil depth,soil type,slope direction have relatively contributing rate on the second?third principal component.Altitude has lower load on the three principal components.3)The vegetation in the studying areas can be classified into 4 types,including initial restoration stage(IRS),progressive restoration stage(PRS),middle restoration stage(MRS),stable restoration stage(SRS).4)the percentage of IRS,PRS,MRS,SRS was 27%,40%,20% and 13%,respectively.5)the discriminant models established by discriminant analysis are credible and good for predicting vegetation restoration stages.
赵勇1；王鹏飞1；樊巍2；阎亮1. 典型退化山地生态系统植被恢复阶段分类——以小浪底库区山地为例[J]. 中国水土保持科学, 2007, 5(1): 77-83.
DIAO Yong-；Wang-Feng-Fei-；Fan-Wei-；Yan-Liang. Classification of typical degraded ecosystems at different stages of vegetation restoration:A case study in Xiaolangdi hilly areas,Henan Province,China. SSWCC, 2007, 5(1): 77-83.
2007, Vol. 5 
