Haiyang Kaifa yu guanli (Feb 2023)
Spatial Evolution and Spillover Effect of Net Carbon Sink Efficiency of Mariculture in China
Abstract
Improving the net carbon sink efficiency of mariculture is one of the important ways for China to achieve the goal of carbon neutrality. This paper used the super efficiency SBM model to calculate the net carbon sink efficiency of mariculture in 9 coastal provinces of China from 2008 to 2019, and analyzed its global and local spatial auto-correlation. Then, the dynamic spatial durbin model was used to explore the influencing factors of the net carbon sink efficiency of mariculture and its spatial spillover effect. The results showed that: (1) The net carbon sink efficiency of mariculture in China was generally high and rising, but there were obvious regional differences. (2) From the global perspective, the net carbon sink efficiency of mariculture between provinces had a spatial positive correlation, and the agglomeration effect was significant, but the degree of spatial agglomeration gradually weakened with the passage of time; from the local perspective, the spatial evolution path of net carbon sink efficiency in some provinces had not changed during the study period, showing a certain path dependence. (3) Science and technology promotion and yield structure had a promoting effect on the net carbon sink efficiency of mariculture, while economic scale and professional personnel investment intensity had an inhibitory effect; from the perspective of spatial spillover effect, professional personnel investment intensity,science and technology promotion and yield structure had positive spillover effect on the net carbon sink efficiency of adjacent areas, while economic scale had negative spillover effect.
