Impacts Prediction of Climatic Change on Distribution and Production of Grassland in Inner Mongolia

The response of grassland to two scenarios of climatic changes was studied and based on forest steppe,typical steppe and desert steppe in lnner Mongolia by means of life zone classification system.Results showed that grassland vegetation is likely to be impacted significantly by climatic change in Inner Mongolia. On the one hand, grassland areas decreased remarkably.The south boundary of grassland shifted northward with a great extent.Forest steppe disappeared from this region.On the other hand,grassland production decreased strongly too.Desert steppe showed the most lost of NPP among grassland types and scenarios.It is suggested that the response of grassland to climatic change reveal spatial shifting of grassland types in the east and south part of this region,while display a rapid decrease of production in the arid region located in the west part.In addition,this study also demonstrated that grassland was more sensitive to the elevation of temperature.