Evaluation of wetland ecosystem services in Yellow River Delta Nature Reserve

As the best preserved and the youngest wetland ecological system in warm temperate zone in the world, the Yellow River Delta National Nature Reserve plays a variety of important ecological service functions.Based on the second survey of Shandong Province wetland resources (2011-2013) and the other analysis data, considering the characteristics, structure and process of wetland ecosystem in the reserve, the evaluation system of ecosystem services has been constructed, and the ecological services of provisioning, regulating, supporting and cultural of wetland ecosystem in the reserve has been evaluated comprehensively with the theory and research methods of eco-economics.The results showed that the total value of ecosystem services provided by wetland ecosystems in the Yellow River Delta National Nature Reserve was 12.3113 billion yuan RMB, and the value of per ha was 59.3 thousand yuan RMB.The provisioning service value of the wetland was the greatest value of 8.5773 billion yuan RMB, which accounting for 69.67% of the total value; the second was the regulating service function of 1.9018 billion yuan RMB, accounting for 15.45% of the total value; the cultural and supporting service were 1.1992 billion yuan RMB and 0.6330 billion yuan RMB, accounting for 9.74% and 5.14% of the total value respectively.the sequence of 15 ecological service values was:wave dissipation and revetment > adjusting flood > food supply > scientific research > carbon fixation > biodiversity conservation > climate regulation > water supply > soil conservation > atmospheric composition regulation > water purification > raw material supply > tourist > shipping > promoting deposition and creating land.The intuitive of monetary value highlights the importance of wetland in the reserve on regional economy and ecological environment, and the study could improve awareness of wetland ecosystem in the reserve, and also provide a scientific theory basis for conservation and management of wetland ecosystem.