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干旱区生态圈层结构是在特定气候条件下水资源有效分配形成的,是生态系统稳定性和生态服务健康性的客观表达。荒漠化背景决定了各圈层类型发育的唯水(径流)性,水资源时空分布及其转化的竞争性决定了圈层结构的脆弱性,社会经济、生态环境耗水的满足程度及景观格局变化决定了圈层结构的生态安全状态。以流域水资源利用率不超过70%和生态耗水率不低于50%为标准,结合圈层结构变化所带来的生态问题分析,得出:干旱区内陆河流域生态系统组成、结构、功能存在重大缺陷,人类活动改变了水资源分配的有效性,生态耗水出现长期亏损,导致圈层结构完整性的基础-天然绿洲及过渡带趋于退化,生态安全问题难以有效遏制,已给干旱区生态经济发展带来了现实和潜在的威胁。
The structure of ecosystem layer in arid area is formed by the effective distribution of water resources in specific climatic conditions and is an objective expression of the stability of ecosystem and the health of ecological services. The background of desertification determines the water-only (runoff) characteristics of each type of development. The spatio-temporal distribution of water resources and its competitive transformation determine the fragility of the stratum structure, the degree of satisfaction of water consumption in socio-economic and ecological environment, and the change of landscape pattern Determine the ecological status of the ring structure. Based on the criteria of not exceeding 70% of water resources utilization and 50% of ecological water consumption, the ecological problems brought by the changes of the ring structure are analyzed. The conclusions are drawn as follows: the composition and structure of the ecosystem in the arid inland river basin, , Major deficiencies in function, human activities have changed the effectiveness of water resources allocation, long-term ecological loss of water consumption, leading to the structural integrity of the circle based on the natural oasis and the transition zone tends to degenerate, ecological security is difficult to effectively curb the problem has been Which brings realistic and potential threats to the eco-economic development of arid areas.