【摘要】 <正>探讨生物种群的空间结构特征及其与环境的关系、环境变化对种群分布的影响等问题已成为现代生态学研究的热点(Engelbrecht et al.,2007;张春雨等,2008;祁建等,2007;唐志尧等,2004)。种群的空间分布结构是种群的主要特征之一,研究昆虫种群的空间分布型对了解昆虫种群的扩散行为、暴发原因、消长规律及可持续性控制具有重要意义(徐汝梅等,2005)。某种昆虫在不同时间、不同栽培模式等层面下的空间分布型相关报道较多(峗薇等,2013;宋树人等,2008;郑伯平等,2010;陈乾更多还原

【Abstract】 The spatial distribution patterns of Basilepta melanopus adults in Camellia oleifera( tea oil camellia) young forests of three different ages were studied using aggregation index examination and regression analysis. Correlation,multiple linear regression and path analyses were carried out on the relationships between eight environmental factors and the aggregation number of the leaf beetle on tea oil camellia. The eight environmental factors included slope( PD),slopes aspect( PX),slope position( PW),vegetation coverage( ZB),and host plant basal diameter( DJ),height( GD),crown width( GF),the distance from nearby old forests( YJ). Results indicated that the spatial distribution patterns of B. melanopus adults were aggregated in C. oleifera young forests of different ages,i. e.,common negative binomial distribution in 1-year-old young forest and tended toward Neyman type A distribution in 3-year-old and 5-year-old young forests. In the young forests,the aggregation of the beetle was caused by environmental conditions. The results of multiple linear regression and path analyses showed that the number of environmental factors influencing distribution of the beetle populations tended to decrease with increasing age of young forest. The YJ and GF were the main environmental factors influencing the aggregation number of the beetle on tea oil camellia. With the increased age of young forest,influence and direct path coefficient of YJ gradually decreased,contrarily,GF become the leading factor in 5-year-old young forest.Migration and dispersal behaviors of B. melanopus adults in young forests were discussed,and the management approach of logging old forests may be necessary to prevent the beetle population from spreading throughout nearby young forest.更多还原