With the sea sweeping in and out and cleansing the area, rich nutrients are able to support countless forms of marsh life. Also, the drainage ditch between the dike and sandbank has become a moat keeping out human interference.
海水上下淘洗，豐富的營養鹽孕育了無數沼地生物，堤防與沙洲間的溝渠又成為隔開人為干擾的屏障。