长江流经多种不同的生态系统，是诸多濒危物种的栖息地，灌溉了中国五分之一的土地。
As a habitat for many endangered species, the Yangtze River flows through diverse ecosystems and irrigates one-fifth of China's land.
生态学家非常担心持续干旱会对湖泊的生态系统和整个长江流域造成严重后果。
Ecologists are very worried about the serious consequences of the continuous drought on the Eco system of the lakes as well as the whole Yangtze River Valley.
上海长江口是我国的典型河口，海域水面开阔，资源丰富，具有多种生态系统服务功能。
The typical estuary—Shanghai Yangtze River Estuary, which is full of resources and with widen surface, has many ecosystem services.
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