摘要
应用频次比较法、聚集度指标法、Iwao与Taylor等的回归分析方法,对云南松梢斑螟的空间分布型进行研究.结果表明其空间分布型为聚集型分布.用Blackith提出的"聚集均数"法对聚集原因分析表明:云南松梢斑螟的聚集现象与其栖息环境有直接关系,生物学特性的作用能通过种群密度的变化表现出来.
Frequency check methods, regression analysis and several aggregation indices were used to determine the spatial distribution pattern of Dioryctria yuennanella. In addition,the aggregation average method by Blackith was applied to analyze the aggregation reasons of Dioryctria yuennanella. The spatial distribution pattern of Dioryctria yuennanella was positively related to its environment, and the function of biological characteristics only occurred with the change of population density.
出处
《西南林学院学报》
2004年第2期41-43,共3页
Journal of Southwest Forestry College
基金
云南省科技厅应用基础研究基金资助项目(2000C0056M).
