【摘要】 蜘蛛是华北农区的主要天敌种群之一,本文研究了农田蜘蛛种群结构及优势种在林带-田埂-农田环境的分布动态。结果表明:(1)研究地区游猎型蜘蛛的优势种为中华狼蛛(Lycosa sinensis Schenkel)和中华平腹蛛(Gnaphosa sinensis Simon);(2)林带和田埂在农作物栽种前和成熟后是蜘蛛栖息和获取食物的主要场所,是农林复合系统中蜘蛛种群的重要种库;(3)耕作活动对蜘蛛种群有较强的负面影响,林带环境具有维持蜘蛛种群稳定性的作用;(4)蜘蛛密度与距林带距离呈负相关性,且在距林带一定范围内密度变化极其显著(P=0.001,α=0.05),表现出明显的林带效应。更多还原

【Abstract】 The study is on community structure of spiders which is main predator in crop fields in North China,and distribution dynamics of dominant species in habitats of forest belt,crop field and ridge of field.The result showed that: Firstly,the dominant spider species were Lycosa sinensis Schenkel and Gnaphosa sinensis Simon;Secondly,forest belt,which became the main habitat of spiders before cultivation and after crop maturation,was a species pool of spiders population;Thirdly,forest belt played an important role in maintaining stability of spiders population,which was affected negatively by cultivaltion;Fourthly,density of spiders had negative correlation with the distance away from the forest belt,and the difference was especially remarkable in an extent(P=0.001,α=0.05).更多还原