河西走廊山地-绿洲-荒漠复合系统耦合的景观生态学机制

系统耦合的基础为非生物环境的空间异质性，基本条件为具有类型相同并且相互连通的廓道，系统耦合的景观生态学机制为非生物环境的空间分异和各种干扰导致的景观异质化，各种干扰是系统耦合的介质，系统耦合从本质上可以被看作尺度变大过程中景观组分的融合与性质转换的过程，系统耦合根据干扰的性质可以分为自然耦合和人为耦合2类，自然耦合是人为耦合的基础，系统生态生产力的提高取决于人为耦合的优化过程。

Landscape ecological mechanism on system coupling of the meta-ecosystem consisted of mountain,desert and oasis in Hexi corridor,Gansu,China

The fundament of system coupling is heterogeneity,and the basic prerequisite is that there are connective corridors in the same type between ecosystems.The landscape ecological mechanism of system coupling is the spatial difference of non biotic environment and the heterogeneity caused by disturbances.The force or energy of system coupling is disturbances.From in the view of landscape ecology,system coupling is the merging process of different landscape elements between different landscape ecosystems followed by the process of character changing of landscape elements with scale changing.Based on the essence of disturbances,system coupling can be divided into two types as natural system coupling and artificial system coupling.Natural system coupling is the base of artificial system coupling,and hence,the enhance of eco productivity of coupling system is based on the optimization of artificial system coupling.