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用相对优势度、Levins生态位宽度、Pianka生态位重叠指数等指标对南京紫金山松材线虫病死木皮下节肢动物的种群结构及生态位进行调查。结果表明:松材线虫病死木皮下节肢动物种群隶属3纲7目17科27种。其中跳虫科、隐翅虫科、蝇科、小蠹科种类为优势种,螨科和天牛科种类为丰盛种,肿腿蜂科、穴甲科、茧蜂科、象甲科种类为常见种,蚁科、露尾甲科、蓟马科、阎甲科、蠼螋科、叩甲科、郭公虫科种类为偶见种。隐翅虫科种类生态位宽度最大,且与小蠹、天牛在时间、空间、时-空生态位重叠指数及生态位相似性比例指数上均高于其他种类,说明隐翅虫与主要蛀干害虫在空间和时间上相遇的几率最大,跟随现象最为明显。本研究对开展载体昆虫携带病原微生物防治蛀干害虫具有较重要的理论意义和应用价值。
The population structure and niche of subcutaneous arthropod in the dead wood of the pine wilt disease in Nanjing Purple Mountain were investigated by relative dominance, Levins niche width and Pianka niche overlap index. The results showed that the subterraneous arthropod populations of dead wood of Bursaphelenchus xylophilus belong to 3 classes, 7 orders, 17 families and 27 species. Among them, the species of the order Insectidae, Paleopteraidae, Muscidae and Beauveriae were the dominant species. The species of the Acariidae and Cerambycidae were rich species, Scleroderma, Acrididae, Braconidae, Common species, ants families, the Department of Acrididae, Thrips Division, Yan Jiake, Suande Branch, rattan Division, Guo common species of insects for the occasional species. The most common niche breadth was Paleontoptera, which was higher than that of other species in the temporal, spatial, temporal-spatial niche overlapping index and niche similarity index. The chance of dry pests meeting in space and time is the highest, followed by the most obvious. This study has important theoretical significance and application value for carrying carrier insect carrying pathogenic microorganisms to control stem borers.