水陆生态交错带的复杂性分析——以东洞庭湖区为例

水陆生态交错带是指内陆水生生态系统与陆地生态系统之间的功能界面区，其复杂性是地理学和地植物学关注的重要问题。以东洞庭湖区为例，分析其复杂性，研究表明：从系统内部看，生物构成复杂多样，界面和生态系统功能复杂，反映了结构与功能的复杂性；从系统外部看，湿地演替过程复杂，以顺向演替为主；其形状相当复杂，斑块的平均分维数为1．374，反映了性态的复杂性；其复杂性注定了它的生态环境脆弱，界面易发生变异，极易与不合理的人类活动相耦合，引发共振。

Analysis on Complexity of Land - lake Ecozone -Taking East Dongting Lake Region as an Example

Land- lake ecozone refers to the functional zone between internal water ecosystem and the land ecosystem, where there is an apparent complexity which attracts attention from geography and geobetany. Taking East Dongting Lake region as an example, this paper analyzes the complexity of land- lake ecozone from the aspects of structure, function and condition character. The results show： It has the complicated biodiversity, complicated interface function and ecosystem function, which reflect the complexity of structure and function from the internal interface system. It has the complicated climb succession of wetland, and complicated shape character, the average fractal dimension of all patches is 1.374, which reflects the complexity of condition character from the external interfacesystem. The complexity of land - lake ecozone is very easily to couple with unreasonable human activities and thus result in resonance because of its vulnerably environment and changeable interface.