As a result, the number of the Japanese deer that mainly eat bamboo has increased and they even eat seedlings and barks of conifers; these complex factors affect the present environmental conditions. |
その笹を主食とするニホンジカの数が増え、針葉樹の実生や樹皮までも採食するといった複合的な要因によって現在の環境に至っている。 |