The Marine Ecosystem Services Value For China's Coastal Area Based On Emergy Analysis Method

Ecosystem service function is directly related to human well-being,and reasonable analysis and evaluation of it is conducive to the sustainable development and utilization of natural ecosystem,so as to promote the sustainable development of human life and economic society.Ecosystem provides various service functions for human beings in two aspects of natural resources and living environment.At the same time,it plays an irreplaceable role in maintaining the dynamic balance between life support system and environment.The importance of marine ecosystem to the normal operation and sustainable development of human society is self-evident.Thus,the purpose of this research was to acquire knowledge and understanding of the value of marine ecosystem services in China's coastal regions.This evaluation involved combining existing research results,based on the theory of ecosystem services and the theory of emergy analysis,estimating marine ecosystem services values in eleven coastal provinces and cities,and analyzing the dynamic spatial and temporal changes of marine ecosystem services values.The results showed that:?1?The values had in general increased from.524?10²³sejin 2005 to.661?10²³sejin2014 during the time the study was conducted,and Hainan,Guangdong,and Shandong accounted for most of the value;?2?Applying the Theil index to analyze the spatial differences of China's coastal marine ecosystem services values.The disparities had shrunk,to which the within-region disparities contributed the most part,but the developments of marine ecosystem services values of both within-region and between-region were unbalanced;?3?Changes in the marine ecosystem services structure in China's coastal regions from2005 to 2014 were analyzed using the information entropy theory.In the temporal dimension,the information entropy and equilibrium degree of China's coastal marine ecosystem services structure consistently showed a fluctuating uptrend;in the spatial dimension,the information entropy of the marine ecosystem services in the eleven coastal provinces and cities had larger discrepancies,and the rank of information entropy was basically unchanged.