绿洲—荒漠生态脆弱带的研究

绿洲—荒漠生态脆弱带是具有敏感地退化趋势的生态交错带 ,它受绿洲生态系统和荒漠生态系统的双重影响。本文在分析了绿洲—荒漠生态脆弱带的性质、特点等以后 ,按照其毗邻绿洲的不同 ,探讨性地将它分为三类 :( 1 )河岸林绿洲—荒漠脆弱带 ;( 2 )冲洪积扇绿洲—荒漠脆弱带 ;( 3 )湖沼和湖滨三角洲绿洲—荒漠脆弱带。由于其本身所具有的脆弱性 ,加上人类活动的强烈干扰 ,该区出现了以土地荒漠化为主的多种生态环境问题 ,针对这些问题 ,作者提出了若干治理建议

Studies on Desert-oasis Ecological Fragile Zone

Desert-oasis ecological fragile zone is a ecotone with sensitively deteriorative tendency which is controlled by both desert ecosystem and oasis ecosystem. So it is important to prevent land from desertification and help oasis extend itself under a good hydraulic condition. The fluctuant vulnerability and interfacial fragility are two major types of unstable forms. The formation of Fragile zone, its landscape types, fragile degree and fragile characters were chosen as the criteria of the desert-oasis ecological fragile zone's classification. According to variant states, natural environment, the process of production and environment management, a qualitative index system of assessing desert-oasis ecological fragile zone was founded. After analyzing its character, three general types were generalized according to oasis' classificatory system, such as alluvial plain (or rive terrace) fragile zone, alluvial fan fragile zone and lacustrine plain(or delta) fragile zone etc, The classification and assessment systems are systematic, complete, objective and flexible to assess desert-oasis ecological fragile zonne. It was tested by used to assess alluvial plain fragile zone along the tarim river. Fragility and disturbance of man caused to many environment problems, especially desertification. At the end of this paper the authors gave some suggestions to deal with these problems.