Increases in the number of wild herbivores resulted in understory degradation because of their overgrazing in forest ecosystems. Deer overgrazing has occurred soil erosion in Japanese beech forests...

中文翻译：

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土壤侵蚀减少了日本山毛榉林的土壤微生物呼吸，林下植被因鹿而消失

野生食草动物数量的增加导致林下植被退化，因为它们在森林生态系统中过度放牧。日本山毛榉林因鹿过度放牧而出现水土流失……