现在的情况对脆弱的亚高山带和高山带生态系统尤其损害，这种生态系统一旦被扰乱，恢复极为缓慢。
This situation is particularlydamaging to fragile subalpine and alpine ecosystems, which recover slowly fromdisturbance.
许多人认为，乔布斯创造的生态系统是一个“带围墙的花园”，但我认为这更像是一块牧场。
Many complained that the ecosystem that he created was a walled garden, but I’d equate it to a pasture.
由于沿岸的营养流失和过度捕捞，海洋生态系统遭受由于海岸带侵蚀造成的水体营养水平改变，还有过度捕捞，也极大破坏了几乎全球各地的食物网。
Ocean ecosystems are beset by changes in nutrient levels due to run off near the coasts and by overfishing, which plays havoc with food webs nearly everywhere.
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