松材线虫染病黑松上钻蛀性昆虫生态位的研究

Niches of borers in Pinus thunbergii infected by Bursaphelenchus xylophilus

2006年8月和10月,在浙江省舟山市和安徽省滁州市的松材线虫病典型发生区调查了黑松上的钻蛀性害虫的种类,分析了衰弱木上优势虫种的生态位宽度、生态位相似性和生态位重叠值。结果表明:在感染松材线虫病的黑松上共发现7种昆虫,其中钻蛀类害虫5种,天敌2种。在两地生活于松树主干上的昆虫种类不尽相同,而且具有各自不同的生态位宽度,存在不同程度的生态位重叠,对空间和营养资源的利用有不同比例的相似性。依据其各自生物学特性和生活习性的不同达到竞争的平衡和共存。

In August and October 2006,the species of borers in Pinus thunbergii in Zhoushan of Zhejiang Province and Chuzhou of Anhui Province where Bursaphelenchus xylophilus occurred typically were investigated. The niche width, proportional similarity of niches and the niche overlap of dominant species in dying trees were analyzed. Seven species were found in Pinus thunbergii infected by Bursaphelenchus xylophilus, including 5 borers and 2 natural enemies. Species of borers in the two areas were different. And all the species had their own niche width, proportional similarity of niche and the niche overlap. They could achieve competitive equilibrium and coexistence according to their bionomics and life habits.