马尾松受松材线虫侵染后昆虫结构和功能变化的研究

2003年11月和2004年6、9月在浙江省舟山市马尾松纯林内选取处于松材线虫病不同侵染期的马尾松进行昆虫的种类和数量及分布位置的调查.明确了处于不同侵染期的马尾松上的昆虫的种类,计算了昆虫的优势度,划分了不同的昆虫功能团,比较了不同侵染期的马尾松上的昆虫群落的丰富度、均匀度和多样性,并对昆虫群落进行了聚类分析.结果表明:在松林中,分解性昆虫占有绝对的优势,衰弱木上的昆虫群落的丰富度、均匀度和多样性较高.而健康木上昆虫群落的丰富度、均匀度和多样性最低.可将6种侵染期的松树上的昆虫群落最终划分为3类.

Changes of structure and function of insects in different stages of Pinus massoniana infected by Bursaphelenchus xylophilus

In Nov. 2003,Jun.2004 and Sep. 2004, in Zhoushan City of Zhejiang Province, where Bursaphelenchus xylophilus happened typically, the authors investigated the species of insects and their quantities, spatial distribution of Pinus massoniana at different stages. The species and their dominance of insects existing in different stages of host trees had been ascertained, and function groups of insects were divided. And then, the authors compared the richness, evenness and diversity of different insect communities which existed in different stages of host trees. Results show that in dying trees, the richness, evenness and diversity of boring insect community are higher than those of the others. And for boring insect community in healthy trees, all the characteristic values are the lowest. All the six communities can be summarized into three kinds.