Environmental fragility is only the premise of severe soil degradation, but vegetation damage induced by destructive human-soil interaction is the key driving force, or "the last straw".
西南喀斯特地区的环境脆弱性只是土壤严重侵蚀退化的前提或内因，日益尖锐的人地矛盾导致的植被破坏和退化才是喀斯特土壤侵蚀退化的关键驱动力。
The paper analyses the stress faced by the ecological system of Feiketu river basin due to project construction, vegetation damage, soil erosion, water pollution and overburden water use.
文章分析了蜚克图河流域工程建设、林草植被破坏、 土壤侵蚀、 水质污染、超负荷用水等使流域生态系统面临的威胁。
When the ants are removed, the trees usually die, probably because herbivores damage them so much that they are unable to compete with surrounding vegetation for light and growing space.
当蚂蚁被移走后，树木通常会死亡，可能是因为食草动物对它们的伤害太大，它们无法与周围的植物竞争光照和生长空间。
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