The results show that the major reason for the land degradation is constant aridity such as shortage of rain, excessive use of land, and shortage of protection measures in dry seasons.
结果表明，土地退化的主要原因是近年持续干旱少雨，土地利用的强度过大，以及在干旱季节里没有适当的防护措施等。
Land reclamation, city and port development, pollution and excessive use of coastal biologic resource are considered as the main environmental forcing factors to the degradation of coastal wetlands.
本文对滨海湿地退化的主要原因进行了分析，指出围垦、城市与港口开发、污染及生物资源过度利用是造成滨海湿地退化的主要因素。
Land reclamation, city and port development, pollution and excessive use of coastal biologic resource are considered as the main environmental forcing factors to the degradation of coastal wetlands.
本文对滨海湿地退化的主要原因进行了分析，指出围垦、城市与港口开发、污染及生物资源过度利用是造成滨海湿地退化的主要因素。
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