柑桔园蜘蛛群落结构及其动态

STRUCTURE AND DYNAMICS OF SPIDER COMMUNITY IN CITRUS ORCHARD OF NANNIN

广西柑桔园蜘蛛已知16科46属90种。不同的蜘蛛种群对桔园生境有明显的选择性。树冠以圆蛛科种群为主,地面以狼蛛科种群为主。树冠群落组成季节变动明显,5月和7月以草间小黑蛛,6、7、9月以皿云斑蛛,10月以草间(虫无)蛛,11和12月以斜纹猫蛛为主。地面的蜘蛛前期以奇异獾蛛为主,中,后期则以幼豹蛛为主。树冠蜘蛛的数量高峰在8、9月,而多样性指数是9、10月最高。

16 family, 46 genus, 90 species of spider were found in citrus orchards of Guangxi. The results of systematic investigation showed that habitat selection in spider population in citrus orchards were very significant. The main components of spider population of tree canopy were Araneidae, and on thr surface of the land were Lycosidae. The dominant population of spider community in tree canopy changed with the seasons.In May and July, the dominant population were Erigonidium graminicolum and Cytrophora moluccensis was in June, Angust and September, and in October was Uloborus walckenaerius, in November and Decemder was Oxyopes sertatus. On the land surfarce the dominant population was pardosa pusiola in the early citrus orchards, but in the middle and lately stage was Trochosa ruricola.