农田狼蛛亚群落结构的研究

本文对南宁市郊农田九种生境狼蛛亚群落结构进行了讨论。群落有7属37种狼蛛。文中揭示了农田各生境区间狼蛛亚群落的主要成分及其主要属性差异的原因。以狼蛛类群为指示动物,用群落相似性比例和聚类分析法,能较好地区分幼豹蛛(Pardosa pusiola)与奇异獾蛛(Trochosa ruricola)和拟环纹豹蛛(Pardosa pseudoannulata)与拟水狼蛛(Pirata subpiraticus)是构成农田区旱地和水田生境型具有代表性的两个狼蛛亚群落主要成分。

RESEARCH ON THE STRUCTURE OF THE WOLF SPIDER SUBCOMMUNITY IN CULTIVATED LAND

In this paper, the composition of wolf spider subcommunity at the habitats of the cultivated land in Nanning area is discussed.Five thousand two hundred and twenty one individuals of wolf spider belonging to 37 species of 7 genera were collected. Among them, the Pardosa pusiola, Pardosa pseudoannulata, Pardosa ventrix,pirata subpiruticus,Pirata piratoides and Trochosa ruricola are the major components of wolf spider subcommunity in that cultivated land. The diversities(H') and species richness(S) of wolf spider subcommunity were found maximum in citrus orchard,but minimum in paddy field in Nanning area. The difference between the diversities(H'), evenness(e),species richness(S)and the dominant concentration (C) at the different habitats of wolf spider subcommunity are very significant(P<0. 01).The wolf spider,Pardosa pusiola and Trochosa ruricola were dominant populations in Nanning area. The activity peak of Pardosa pusiola adults and young spiderlings occurs in May and October, respectively.By using similarity of the number proportion for community and analysis FUZZY method, the results of the research showed that main components of wolf spider subcommunity were Pardosa pusiola and Trochosa ruricola in arid land, Pardosa pseudoannulata and Pirata subpiraticus in paddy field,respectively. Pardosa venatrix was the component in both arid land and paddy field. These component compositions are quite typical for wolf spider subcommunity in the two types of main habitats of cultivated land in Nanning area.