Water birds on the wetland are an important component of the wetland ecosystem, playing a very important role in maintaining the wetland ecosystem.

湿地水鸟是湿地生态系统的重要组成部分，对维持湿地生态系统起着举足轻重的作用。

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The ecological functioning of the wetland, for instance, in flood control, water purification, and habitat provision for waterfowl and other birds, have been seriously affected.

沙化对湿地功能，诸如洪水调控、污染物净化以及提供动植物栖息地等造成了不同程度的破坏。

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Friends of the Earth (FOE) has said that numerous wetland areas that provide habitats for unique birds and plants were not included on the list sent to Ofwat, the water industry's regulator, by the Environment Agency.

BBC: Campaigners claim beauty spots 'at risk'