森林生态系统是以森林植物为主体,并与其它生物一起和环境组成的一个整体。在这个整体中,森林植物起着主导的作用,而其它生物和非生物,则处于从属的地位。即森林的存在与否,决定着其它因素质和量上的变化。森林生态系统各组成之间相互联系,互相制约地形成一个网络结构。森林生态系统的网络结构可概括为如下三大方面: 一、森林生物系统包括森林群落中的植物、动物和微生物在内的全部生物因素。在这些生物中间,它们的关系是非常密切的,也是 Forest ecosystems are forest plants as a whole, together with other organisms and the environment as a whole. In this whole body, forest plants play a leading role, while other living things and non-living things are in a subordinate position. The existence of the forest determines the quality and quantity of other factors. The various components of forest ecosystems are interconnected and mutually constrained to form a network structure. The network structure of forest ecosystems can be summarized into the following three aspects: First, all biological factors of forest biological systems including plants, animals and microorganisms in forest communities. In the middle of these creatures, their relationship is very close, too