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从作用于洞庭湖系统功能的水沙过程入手,探讨水沙过程变异下湖泊系统功能的连锁响应认为:①洞庭湖是一个由其形态系统功能﹑生态系统功能和服务系统功能共同维系的巨系统;②水沙条件变化导致湖盆结构变形﹑湖面湖容缩小﹑生物多样性不稳定﹑航运里程缩短﹑水环境净化能力减弱﹑东方田鼠与钉螺极度膨胀﹑鱼类捕捞产量和水资源量减少等响应现象;③水沙过程变化与湖泊系统各项功能之间始终保持着短期与长期﹑局部和整体等不同层次﹑不同时空的耦合关系,因而表现出层次关联性﹑时空差异性﹑对应因果性和相互依存性等特性。
Starting from the process of water and sediment acting on the system function of Dongting Lake, it is discussed that the chain reaction of lake system function under the process of water and sediment process variation is as follows: ① Dongting Lake is a giant system co-maintained by its morphological system function, ecosystem function and service system function ; ②Water and sediment changes led to the deformation of the lake basin ﹑ lake lake capacity is reduced ﹑ instability of biological diversity ﹑ shipping mileage shortened ﹑ water purification capacity weakened ﹑ Vermilion and Microtus ostreatus expansion ﹑ fish catch reduction and water resources reduction Response phenomena; ③the relationship between water and sediment process and the lake system has always maintained the coupling between different levels and different spatial and temporal couplings, such as short-term, long-term, local and overall, thus showing the relationship of level, space-time and corresponding causality And interdependence and other characteristics.