Density related plasticity in stand-level spatial distribution of the ambrosia beetle, Platypus koryoensis (Coleoptera: Curculionidae)

摘要: We tested the hypothesis that population density of ambrosia beetles at stand level influences spatial distribution infested trees. evaluated beetle, Platypus koryoensis (Murayama) in three oak forest stands varied beetle using a multi-year trapping survey. used these data to inform clustering analysis based on aggregation indices SADIE software. Four important findings emerged: (1) pattern P. changed as varied; (2) low densities, was contagious level; (3) densities increased, trees became random, potentially due avoidance mass attacked trees; and (4) high contagious, possibly temporal changes location attack epicenter within stand. Our results support has consequences for within-stand scale. conclude is flexible response density, suggesting behaviors are mediated by one or more density-dependent effects.