有证据表明，这一时期发生了重大的生态和地质变化。
There is evidence of major ecological and geological changes during this period.
重力是生态系统形成与变化的基础动力之一。
The form and change of ecosystem gravity is one of the basic dynamic.
植被覆盖度是绿洲生态环境变化的最重要标志之一。
Plant cover is one of the most important sign of oasis ecological environment change.
海洋生态环境的变化。
生态系统倾向以抗拒外来变化为原则而维持在一个平衡状态。
The tendency for a system by resisting change to remain in a state of equilibrium.
未来气候变化将会对已不堪重负的生态系统产生更大的压力。
In the future, climate change will place even more pressure on overworked ecosystems.
未来气候变化将会对已不堪重负的生态系统产生更大的压力。
In the future, climate change will place even more pressure on overworked ecosystems.
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