摘要
为探讨生物群落结构与功能的关系，有效地开展棉田害虫、天敌的生态调控，作者在系统调查与测定华北棉区８种不同时空类型棉田害虫、天敌群落物种丰富度、总个体数、能流量多样性指数及群落生产力的基础上，分析了各类型棉田害虫、天敌群落结构与功能的关系，总结了如下的一般规律：１）上一营养层（棉株或害虫）的生产力越高，其所支持的下一营养层（害虫或天敌）群落的总个体数和生产力增加；２）害虫群落的物种丰富度与其群落生产力无关；其总个体数越多，生产力越高；其能流量多样性指数越大，生产力越低，为害越轻；３）天敌群落物种丰富度和总个体数越多，其群落生产力越高，它们的能流量多样性指数与生产力的关系较为复杂。由此．进一步探讨了群落结构与功能关系的理论及其在棉田害虫与天敌调控中的应用。
Based on the systematical investigation and determination of specieses richness, total individual numbers, diversity indices and production of insect pests comunity and natural enemies community in eight different cotton agroecosystems, the correlation between their structure and function was analysed. The results show: 1) with the enhancement of production in higher trophies, the total individual numbers and community production of insect pests or natural enemies increased, and their diversity indices fluctuated, 2) insect pests community production increased when their total individual numbers increased and its diversity indices decreased, but no significant correlation was founded between their species richness and community production, 3) natural enemies community production increased with the enhancement of its specieses richness and total individual numbers, the correlation between its production and diversity indices were found to be very complex. The theory on the correlation between the structure and function in ecocybernetics of cotton agroecosystems as well as its application to regulation of insect pests and natural enemies of the ecosystem were also discussed.
出处
《生态学报》
CAS
CSCD
北大核心
1996年第5期535-540,共6页
Acta Ecologica Sinica
基金
国家自然科学基金
