Elucidation of the mechanism of food selection of sika deer, and construction of the prediction model of bark-stripping damage.

为了从食物选择的角度阐明梅花鹿剥皮的机理，建立剥皮危害预测模型，对人工林和天然林剥皮发生与环境因子的关系进行了调查和分析。人工林研究结果表明：海拔高度和坡度对树皮剥离危害的发生有负面影响。相邻草地的面积比对生态环境的影响是积极的。与杉木相比，日本雪松遭受损害的可能性更大。在天然林中的研究结果表明：各树种大小、林地覆盖面积、鹿的使用频率对树皮剥离危害的发生有正向影响。

To elucidate the mechanisms of bark-stripping by sika deer with a viewpoint of food selection, and to construct the models predicting the bark-stripping damage, I investigated and analysed the relationships between the occurrence of bark-stripping and environmental factor in plantation and natural forest. The results of the research at plantation showed that: The altitude and slope degree had negative effect for occurrence of bark stripping damage. The area ratio of neighboring grassland had positive effect. The probability of suffering damage increased with a Hinokisypress than a Sugi cedar. The results of the research at natural forest showed that: each tree size, ratio of Sasa bamboo cover on forest floor, and using frequency of deer had positive effect for occurrenceof bark stripping damage.