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以昆嵛山天然赤松(Pinus densiflora)林和寡食性食叶昆虫-昆嵛山腮扁叶蜂(Cephalcia kunyushanica)为研究对象,对比树种组成类型、多样性、立地和林分因子对昆嵛山腮扁叶蜂种群密度的影响,分析了2009—2011年昆嵛山腮扁叶蜂在不同林分类型中种群年度波动变异系数。结果表明:林分类型是影响昆嵛山腮扁叶蜂虫口密度最重要的解释变量,随着赤松与混交亲缘关系越远,虫口密度越小。不同林分类型中,Shannon指数和赤松株虫口密度存在差异,但两者变化趋势完全不同。赤松纯林中赤松株虫口密度均为最高,与赤松-同属混交林没有显著差异,显著高于赤松-同目和阔叶树种组成的混交林;赤松纯林和赤松-同属混交林中昆嵛山腮扁叶蜂种群年度波动大于其他两种林分类型。表明相比树种多样性,树种组成对昆嵛山腮扁叶蜂种群的影响更为重要,赤松与其亲缘关系较近树种混交,昆虫种群稳定性较差,赤松与相邻树种形成对昆嵛山腮扁叶蜂联合易感作用,而与其他亲缘关系较远的树种混交,使害虫种群稳定性增强,进而形成联合抗性作用。
In this paper, Pinus densiflora forest and Cephalcia kunyushanica, an insects species insecticide in Kunyu Mountain, were used as research objects to compare the species composition, diversity, site and stand factors of Kunyu Mountain Gills leaf bee population density, and analyzed the annual variation coefficient of population fluctuation in different types of forest in the Kamenny Mountains, Taiwan, from 2009 to 2011. The results showed that: the type of forest stand was the most important explanatory variable that affected the population density of the beeworm, Myzus persicae in Kunyu Mountain. With the genetic relationship between Pinus densiflora and mixed parent, the population density was smaller. The Shannon index and the population density of Pinus densiflora differ in different forest types, but the trend of the two is completely different. The population density of Pinus densiflora in Pinus tabulaeformis was the highest, but not significantly different from that in Pinus densiflora and Pinus sylvestris. It was significantly higher than that in mixed forest of Pinus densiflora and the same broadleaf tree species. The annual fluctuation of the bee population is greater than the other two types of forest. The results showed that the tree species composition was more important than the species close to the tree species in Kunyu Mountain and the insects had less stability. Gills leaf bee synergistic susceptible role, but with other distantly related species mixed, so that pest population stability increased, thus forming a joint resistance.