Evaluation of wetland ecosystem services value of the yellow river delta.

Analyzing and evaluating the ecosystem service value of wetlands can provide technical support and theoretical basis for regional socio-economic development, ecological environmental protection, and other planning measures. Based on the factors of hydrology, meteorology, society, economy, resources, environment, and culture, the wetland ecosystem services value of Yellow River Delta (YRD) was evaluated by the method of functional value and equivalent factor, which has certain reference significance for future research. Two methods were used to calculate the ecosystem services value of YRD in 2016, and the results were $3.28 × 109 per year and $4.53 × 109 per year, respectively, and the regulation services accounted for 76.3% and 16.7%, respectively. Through comparative analysis of ecosystem services value from 2001 to 2016, the average proportion of regulation services was 51%. Regulation service is the leading function of wetland ecosystem of YRD. Equivalent factor method is more suitable for the assessment of wetland ecosystem service value of YRD in 2016. In terms of time, ecosystem services value tended to increase, with an average rate of $2.02 × 109 per year. In terms of space, it gradually increased from inland to shallow sea water. On the premise of rational development and utilization, it is predicted that the value of ecosystem services will continue to grow in the future.