湿地是泛指内陆水面和沿海浅水区及其邻接地带水陆交相延伸的一定区域。湿地既是一项重要的自然资源 ,又是一种独特的生态系统 ,是地球生态环境的重要组成部分 ,与森林、海洋一起并称为全球三大生态系统。湿地的消长变化 ,与生态平衡、人类生存和经济社会的可持续发展息息相关 Wetland refers to a certain area extending inland and inland waterways of inland water surface and coastal shallow water areas and their adjacent areas. Wetland is not only an important natural resource, but also a unique ecological system. It is an important part of the earth’s ecological environment and together with forests and oceans, it is also called the three major ecosystems in the world. The growth and decline of wetlands are closely related to the ecological balance, human survival and sustainable economic and social development