摘要
为了探讨封山育林的抗虫机制及对害虫的营林管理对策,本文研究了封山育林对昆虫群落时空结构及多样性、稳定性的影响。利用机械抽样方法在4种不同封山类型林分内的调查表明,封山育林可以使得林内昆虫群落的种类数量尤其是天敌类群的种类数量显著增加;封山区天敌类群所占比例较未封山区增加33.89％,昆虫群落的垂直结构更加复杂;随时间的变化,封山区昆虫种类数及种类多样性增加幅度较大,个体数量变化平缓,群落的稳定性有较大增强。
In this paper, the influences of closed forest on the species composition, spatial and temporal structure, diversity and stability of insect community are studied. And the expression of insect community stability are aprroached, too.The investigation which are carried out in four different closed or unclosed forest stands shows that the closed forest can greatly change the composition and the structure of the insect community and make the number of the insect species and individuals, expecially the enemy group, increase obviously. The proportion of the natural enemy group in the insect community in closed forest stands increases by 33.89% more than that in unclosed forest stands. The vertical structure of the insect community becomes more complicated. In closed forest stands, the insedt species number and diversity index considerably increase with time,the number of the individuals changes gently, the community stability increases greatly, too.
出处
《生态学报》
CAS
CSCD
北大核心
1992年第1期1-7,共7页
Acta Ecologica Sinica
关键词
封山育林
昆虫群落结构
多样性指数
closed forest, insect community structure, diversity index, stability.
