Size, species, presence/absence of damages by ambrosia beetle (Platypus quercivorus) and some relevant information for the trees sampled in 11 plots established in an evergreen forest dominated by ubame oak (Quercus phillyraeoides)

This is the surveyed data about the damage of the oak (Quercus phillyraeoides) and other tree species caused by attacking of the beetle in Muroto city, Kochi Prefecture, where is the main production area of the charcoal. A total of 560 individuals of Quercus phillyraeoides were sampled in 11 circular plots (each 0.02 ha). "Presence/absence of damages by ambrosia beetle" was checked for each individual. "Mean diameter in a plot" represents the mean diameter of stems of Q. phillyraeoides within a plot. "Mixture ratio" represents the proportion of other species than Q. phillyraeoides in terms of stem number within a plot.

本数据集为对高知市（Kochi Prefecture）内的橡树（Quercus phillyraeoides）及其他树种因遭受甲虫侵害所造成的损害情况进行调查所得。高知市是木炭的主要生产区域。共在11个圆形样地（每个样地面积为0.02公顷）内对560株橡树进行了采样。对每株树进行了‘害虫介壳虫造成的损害存在与否’的检查。‘样地内平均直径’代表样地内橡树树干平均直径。‘物种混合比’表示样地内除橡树外其他树种在树干数量上的比例。