栎空腔瘿蜂虫瘿在栓皮栎上的空间分布

Spatial distribution of gall wasp Trichagalma glabrosa on cork oak Quercus variabilis

应用生物统计方法对栎空腔瘿蜂(Trichagalma glabrosa)有性世代和无性世代虫瘿在栓皮栎(Quercus variabilis)空间分布特性进行了调查分析。结果表明,栎空腔瘿蜂有性世代和无性世代虫瘿均成聚集分布,聚集的原因是由栎空腔瘿蜂本身的生物学特性或生物学特性与环境的异质性共同作用所决定。水平方位上,虫瘿密度差异不显著,垂直方位上,有性世代虫瘿密度在栓皮栎树冠的下层最高,无性世代虫瘿密度在树冠的上层最高。

Biostatistical methods were used to analyze the spatial distribution of sexual and asexual generation galls of Trichagalma glabrosa. The results showed that spatial distribution of sexual and asexual generation galls was aggregated,probably because of the biological properties of T. glabrosa, or because of a combination of the biological properties and the environmental heterogeneity. There were not significant differences in density in horizontal directions between sexual and asexual generation galls. However, they were different in vertical directions, where the density of sexual galls was higher in the lower crown and that of asexual galls was higher in the upper crown.