双季稻区两类生境稻田节肢动物群落结构比较

用吸虫器采样法，对双季稻区中处于多样化生境及单一生境中的两类稻田中的节肢动物群落结构特征进行了比较研究。结果表明：在早稻生长发育初期和晚稻生长全期，多样化生境稻田中捕食性节肢动物的物种数和个体数量都显著高于单一化生境稻田。同时，多样化生境中稻田植食性昆虫的物种丰富度高于单一化生境稻田，但其个体数量较低。非稻田生境主要作为稻田捕食性节肢动物群落的种库，能促进稻田捕食性节肢动物群落的重建。

Compare the community structure of arthropods in heterogenous habitats with that in monotogeous ones in the two-crop paddy field area

The community structure of arthropods both in heterogenous and in monotogenous habitat in two-crop paddy field area was studied with the suction sampler. Both the species richness and number of individuals of predatory arthropods in paddy field in heterogenous habitats were larger remarkably than those in monotogenous ones both at early stage at early rice and at whole stage at late rice. There were more species richness and less number of individuals of phytophagous insects in paddy field in heterogenous habitats than that in monotogenous ones. These results suggest that the community of predatory arthropods in non-rice habitats nearby the paddy field might be an important species pool for reestablishment of the community of predatory arthropods in paddy field.