Ecological studies on relationship between the process of des ertification and vegetation dynamics in the west of northeast China:Vegetation o rdination

Abstract

Abstract: Based on the data obtained from 72 plots of plant community and 276 plant species in Hulunbeier Sandy Land and Kerqin Sandy Land in the northeast deserti fication region of China, TWINSPAN analysis and DCA (Detrended Correspondence An alysis) were carried out. The result of DCA ordination reflected sufficiently th e relationship between vegetation in sandy land and geographical, climatic, topo graphical, hydrological, disturbance factors. The axis 1, axis 2, axis 4 of DCA ordination reflected water, soil and heats gradients of vegetation distribution in sandy land respectively. The figure of DCA ordination of axis 1 & axis 2, and axis 1, axis 2 & axis 4 reflected the ecological regulations between vegetation and sandy desertification. Combined with qualitative and quantitative factors, the linear regression model was established between DCA ordination axis and geog raphy, climate, topography, hydrology and disturbances by using dual selection stepwise regression analysis.

Key words: West of northeast China, Sandy desertification r egion, Vegetation, Ordination, growth, Taxus wallichina var. mairei, form quality, Cunninghamia lanceolata, gap size

CLC Number:

Q948

GUAN Wenbin . Ecological studies on relationship between the process of des ertification and vegetation dynamics in the west of northeast China:Vegetation o rdination[J]. Chinese Journal of Applied Ecology, 2001, 12(5): 687-691.

References

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