The study of the species diversity in different kind of deserted grassland in source area of Yellow and Yangtze rivers;

Study on Biodiversity Conservation Priorities——Taking Sanjiangyuan Region;

Ecosystem services and its value evaluation of Sanjiangyuan Region;

The ecological function analysis and evaluation of ecosystem in Sanjiangyuan region;

The cluster analysis of different degraded-grassland types in the water head regions;

Data of representative grassland ecology during 1987-2004 and meteorological data during 1961-2004 were used in analysis of rangeland eco-environment change situation in water head region and Qinghai lake region, integrated to satellite remote sensing and social investigation data.

Widely spread grassland, specific alpine wetland and endemic biodiversity are main natural biological resources in the source region of Changjiang-Yellow Rivers.

The authors monitored dynamic changes of land cover in the source region of the Yangtze and Yellow Rivers by using 1986 TM and 2000 ETM datum based RS and GIS technology.

Based on the grassland survey and remote sensing technology, the ecological types and their spatial distribution of grassland, the features of grassland resources and their utilization statues in the source regions of Yangtze and Yellow rivers were studied.