论短期农作物生境中节肢动物群落的重建I.群落重建的概念及特性

农田生态系统是一个不稳定的生态系统，包括作物生境和非作物生境两个组成部分。非作物生境对作物生境中的害虫及其天敌可产生正的或负的影响。在短期农作物生境中，周期性的种植和收割使得其中的节肢动物群落亦周期性地呈现出群落重新形成、群落发展和群落瓦解３个阶段。这一群落的发展和自然群落的富替是两种不同的发展方式。因此，将短期农作生境内节肢动物群落的重新形成过程定义为群落的重建，而非作物生境内的节肢物群落称之为

The reestablishment of the arthropod community in short-term crop fields:I.Concept and characteristics of the community reestablishment

A crop ecosystem,an unstable ecosystem,is composed of crop fields and non crop habitats.Non crop habitats show positive or negative impacts on the pests and natural enemies in crop fields.In the fields of a short term crop,due to its periodic transplantation and harvest,arthropod community appears periodically 3 different stages which are community reformation,development and collapse.This kind of community development is different from the succession of a natural community.Therefore,the community reform...