The ecosystem in Tibet is extremely fragile,and the ability to resist disturbance and regenerate is weak. Once the ecosystem is damaged,it is hard to restore it for a long period of time.

• 西藏地区生态系统十分脆弱，抗干扰能力低，自我更新能力差，一旦遭到破坏，在很长时间内难以恢复。