Research on classification and sorting of forest communities
Based on field survey data of forest communities in the upper and middle reaches of the Wenyu River in Shanxi Province,the forest communities in this area were classified and sorted by quantitative ecology of vegetation.Two way indicator species analysis(TWINSPAN)was used to classify the forest communities in the study area,dividing 52 forest plots into 13 clusters,the dominant clusters mainly include Cluster Imainly including Cluster I(Picea meyeri,Vicia unijuga and Carex lancifolia),Cluster II(Betula platyphylla,Picea meyeri Corylus heterophylla and Carex lancifolia),and Cluster III(Picea wilsonii,Rosa bella and Carex lancifolia).The results of canonical correspondence analysis(CCA)showed that altitude was the main controlling environmental factor affecting the distribution of communities and dominant species in the study area.Dominant species and environment,as well as communities and environment,had a relatively consistent spatial distribution pattern,that was,the correlation between dominant species and environment directly reflected the correlation between communities and environment.The research results provided references for the protection and management of forest communities in the study area.
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