感病松林内松墨天牛成虫空间格局的时序动态

Spatial Pattren and Its Time Series Dynamics in the Population of Monochamus alternatus Adults in Susceptible Pine Forest

利用浙江省临海市3个试验点2007—2012年感病松林内松墨天牛成虫的连续诱捕数据,在分别计算该成虫种群多项空间格局指标的基础上分析各项指标与成虫密度间的相关性,选择受密度影响较小的负二项分布K值来描述松墨天牛成虫空间格局的时序动态。结果表明,感病松林内松墨天牛成虫呈聚集分布,聚集度随季节而变化,年度内的聚集总趋势为聚集-扩散-聚集。

Systematic trapping Monochamus alternatus adults were carried out with pine stem borer attractant in Pinus massoniana forests in 3 susceptible pine forests trapping sites in Linhai during 2007-2012. According to the sampling data, multiple spatial pattern indicators of adult population were calculated and the relationship between various indicators and densities were analyzed.The value of K of negative binomial distribution less affected by density were chosen to describe the spatial and temporal patterns of Monochamus alternatus adult population in susceptible pine forests. The resuits indicated that the population were aggregated in susceptible pine forests, but the intensity of aggregation changed seasonally. The population changed from aggregated to diffusion and then to aggregated again in a year.