基于SBM模型的我国海洋渔业生态效率的时空演变

The Spatial-temporal Evolution of Marine Fishery Eco-efficiency Based on SBM Model in China

随着“海洋强国”建设的深入实施,我国海洋经济实力不断提升,但也出现海洋环境污染和生态破坏等制约海洋产业可持续发展的问题,亟须改善海洋生态环境和提高海洋产业生态效率。文章以海水养殖排污总量作为非期望产出,采用SBM模型、标准差和变异系数,分析2006—2015年我国海洋渔业生态效率的时空演变特征,并对我国沿海地区的海洋渔业生态效率水平进行分类。研究结果表明:2006—2015年我国海洋渔业生态效率整体处于中等水平,且呈波动式下降趋势;沿海各地区的海洋渔业生态效率差异显著,且差异呈不断扩大的趋势;沿海各地区的海洋渔业生态效率水平可分为高效型、中效型和低效型3个类型,其中广东省和江苏省从中效型下降至低效型,主要原因在于其存在生态恢复滞后性。

With the implementation of the strategy of building a“maritime power”,the marine eco­nomic strength of China has been constantly improving.But at the same time there have been a se­ries of problems that restrict the sustainable development of the marine primary industry,such as marine environmental pollution and ecological destruction.Therefore,improving the marine eco­logical environment and the ecological efficiency of marine fisheries are the basic guarantees for a-chieving sustainable development of the marine economy.Based on the total amount of sewage discharged from mariculture process as an unexpected output,the temporal and spatial evolution characteristics of China s marine fishery ecological efficiency from 2006 to 2015 were analyzed by using SBM model,standard deviation and coefficient of variation.And classifying the level of eco­logical efficiency in coastal area.The results showed that during the study period*the average value of marine fishery eco-efficiency in China,which had taken into account the undesired output,was at a moderate level and fluctuating downward,while the regional differences showed a trend of fluctuation and expansion.The marine fishery eco-efficiency level in China was divided into three categories:high-efficiency,medium-efficiency and low-efficiency.During the study period,Guangdong and Jiangsu dropped from moderate-efficiency to low-efficiency.The main rea­son lied in the lag of ecological restoration in Guangdong and Jiangsu provinces.