关键词: 沙漠化, 植被演替, 群落多样性

Abstract: Based on study reports and publications,this paper briefly reviews the development history of basic theories in vegetation succession.The classic theory of mono-climax though used to be an important approach in succession research,has elicited much criticism because of its overlooking the importance of time and soil effects.The idea of polyclimax,climax pattern,ecological succession and ecosystem development have enriched and developed the modern theories of succession.Based on the preceding theories,research situation in vegetation succession is examined in desertification.Regressive or progressive succession of plant community is virtually positive or negative processes of desertification.Research on vegetation succession,which is connected with agriculture,forestry and graziery production and economy activities,is the theoretical basis on suitably managing and utilizing natural resources.Thus,further research on relationships of vegetation succession and biodiversity,population and environment during desertification is the efficient key to finding ways of vegetation restoration,improving ecological environment,controlling desertification and realizing sustainable development.

Key words: desertification, vegetation succession, community diversity