玉米地节肢动物群落优势功能集团的组成与演替

近年来 ,对于农作物害虫的研究 ,不再局限于单个害虫的发生规律 ,而偏向于对昆虫群落的研究 ,因为群落是联结种群与生态系统之间的桥梁。对有害生物的综合治理 ,也更加注重对群落结构的影响 ,而不是只考虑某一特定有害生物的本身9] 。研究和分析节肢动物群落的结构特征 ,对于控制害虫的种群变动及进行综合治理有重要的意义。金翠霞等运用种类丰富度 (ｓ)、均匀性 (ｖ′)和申农系数 (ｓｈａｎｎｎｏｎｉｎｄｅｘＨ′)分析了稻田节肢动物群落和各亚群落多样性的空间层次差异 ,季节动态以及杀虫剂对群落结构的影响5] 。郝树广等把稻田节肢动…

Dynamics and Composition of Dominant Guilds and the Biodiversity of Arthropod Community in Spring Zea mays

Systematic investigation and analysis of arthropod in spring Z. mays in the suburbs of Chongqing was carried out during 1998-1999.The component structure and biodiversity of the arthropod community were studied according to the species,guilds and nutrient classes.The results indicated that there are 320 species of arthropod in spring Z. mays in the suburbs of Chongqing City.Among this,43.8% is pests,48.4% is natural enemies and 7.8% is other neutral insects.All of the arthropod was divided into 4 nutrient classes,7 guilds,and 22 groups,which include plant eating groups,natural enemy groups and others.These groups directly or indirectly depend on corns and make up an integrated food chain.Every natural class has its dominant species and key species.But these species change with the growth of corns.In this paper,the function of the dominant species,dominant groups and guilds in the integrated pest management was analyzed.The relationship between abundance, bio diversity and key species was also analyzed.It is indicated that key species play an important role in pest control.