南亚热带退化生态系统恢复中昆虫群落的研究

A Study of Insect Communities in the Restoration of Low Subtropical Degraded E cosystem

报道了广东省鹤山市南亚热带丘陵四种人工林的昆虫群落特征,在四种昆虫群落中,只有针叶混交林昆虫群落的种-多度曲线符合Fisher的对数级数模型,其他三种昆虫群落的种-多度曲线基本符合Preston的对数正态分布。四种昆虫群落的优势类群较为一致,均为鳞翅目Lepidoptera昆虫,且优势科均为螟蛾科Pyraloidae;但各昆虫群落的优势种却明显不同,针叶混交林昆虫群落的优势种十分明显,为松突圆盾蚧Hemiberlesiapitysophila,其优势度指数高达0 1995;纯松林、乡土树种混交林和豆科植物混交林的优势种则分别为湘土苔蛾Eilemahunanica、新角条麦蛾Anarsianovitricornis和李条麦蛾Anarsiapatulella,其优势度指数分别为0.0755、0.0836和0.0690。四种昆虫群落的多样性指数H′、种间相遇几率PIE和均匀度指数J′均比较高,反映出这四种昆虫群落的稳定性均比较强。

The characteristics of insect communities are investigated in coniferous mixed forest, leguminous mixed forest, native species mixed forest and pine forest of subtropical hilly land in Heshan, Guangdong Province The results showed that the curve of the species_abundance of insect community in coniferous mixed forest was fitted to the Log_series distribution,and those of other three were fitted to Log_normal distribution. The dominant order and family of insect communities in four types of forest stands were Lepidoptera, Pyraloidae , but the dominant species the insect community in coniferous mixed forest was Hemiberlesia pitysophila(d=0199 5), and  Anarsia novitricornis (d=0083 6), Anarsia patulella (d=0069 0) and Eilema hunanica (d=0075 5) in the native species mixed forest, leguminous mixed forest and pine fores t,respectivevly. All of diversity index (H), probability of interspecific encounter (PIE) and evenness index (J) were high in the communities. These indicated that the insect communities were stable in the four forest stands.