China is facing a variety of serious ecological problems such as land desertification, soil erosion, low forest coverage and quality, grassland degradation, lake eutrophication, wetland shrinkage, biodiversity depletion, and exotic species invasion. Although the Chinese government has adopted a number of measures to protect and restore ecosystems in this country, difficulties are met In implementing them, especially many significant scientific and technological problems remain unsolved. The Chinese Academy of Sciences (CAS) has been building scientific infrastructure to encourage and support ecologists to conduct researches to meet national demands in this regard. Under the Umbrella Program of Integrated Ecosystem Studies, CAS is supporting six ecological research projects, and has achieved a number of primary research results.
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