Such methods were applied as ecosystem services value assessment, GIS and comparative analysis.
研究方法：生态系统服务价值评价方法、GIS技术、比较分析法。
This article revolves around the theme of "evaluation of Yellow River Delta wetland ecosystem services," studied and discussed the theory, methods and practice of the assessment.
本文围绕着“黄河三角洲湿地生态系统服务评估”这一主题，对生态系统服务评价的理论、方法与实践进行了研究与探讨。
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