Potential vegetation dynamic analysis of spatial and temporal characteristics of Inner Mongolias geographical pattern in recent 50 a

Under different environmental conditions, original vegetation succession shows significant complexity, and this is related to different geographical patterns. Based on GIS analysis and Comprehensive Sequential Classification System, the last 50 years climate data of 94 meteotological stations in and around Inner Mongolia were studied. Besides, the dynamic spatial and temporal characteristics of the geographical pattern of the potential vegetation classes in Inner Mongolia were simulated and analyzed in this study. The results showed that the potential vegetation classes in Inner Mongolia include 16 classes belonged to 6 class groups in the desert and steppe. The potential vegetation class indicated that the arid and humid zonal distribute in high plains and piedmont areas, and the vertical zonal distribute in the Yinshang Mountains and Daxinganling Mountains. In recent 50 years, there has been three have been grate changes in the specific area of various types of potential vegetation with obvious succession between different classes of potential vegetation. Affected by dry weather, the desert area, semidesert, mountain steppe and typical steppe showed an increasing eastward expansion trend. However, affected by dry weather and increasing temperature, meadow steppe, forest steppe and forest showed a decreasing, high altitude, and high latitude shrinking trend. This succession reflects plants adaptability to habitat and climate changes.