干旱地区灌丛沙堆研究现状与展望(英文)

编号 zgly0001586261

文献类型 期刊论文

文献题名 干旱地区灌丛沙堆研究现状与展望(英文)

作者 杜建会  严平  董玉祥 

作者单位 SchoolofGeographicalScienceandPlanning  SunYat-SenUniversity  StateKeyLaboratoryofEarthSurfaceProcessesandResourceEcology  BeijingNormalUniversity  CollegeofResourcesScience&Technology  BeijingNormalUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2010年05期

年份 2010 

分类号 P941.71 

关键词 nebkhas  successionperiod  protectionmeasures  ecologicalfunction 

文摘内容 Nebkhas are often extensively distributed in arid and semi-arid areas,and play an important role in the stabilization of ecological environment in these areas.This paper reviews the following aspects,including formation and succession,spatial distribution,shape and surface airflow characteristics,balance between erosion and deposition,ecological and physiological characteristics of vegetation,response to precipitation and groundwater,soil properties as well as the protection measures.We found that nebkhas were studied without differentiation of succession periods,and shape characteristics,surface airflow,soil properties as well as vegetation dynamics in different succession periods were not fully understood,which made it difficult to explain the succession dynamics of nebkhas and its affecting factors.Previous studies of nebkhas were over-emphasized for its role as an indicator of land degradation,while its ecological functions in degraded ecosystems were neglected,which was unfavorable for the ecological restorations in arid and semi-arid areas.Future studies should pay more attention to the variation of vegetation,soil as well as hydrological process in the succession of nebkhas and its interaction between different influencing factors.In addition,positive role of nebkhas in degraded ecosystems in arid and semi-arid areas should be fully discussed.According to the data got from the above,effective protection measures of nebkhas should be explored.