基于营养级法的福建省淡水捕捞渔业碳汇量评估探析

Research on the evaluation of the freshwater capture fisheries carbon sinks in Fujian Province based on trophic level method

淡水捕捞渔业作为碳汇渔业的重要组成部分,其碳汇量评估方法是学术探讨的重要内容。在对福建省淡水捕捞渔业主要水域生产渔船进行分层抽样的基础上,通过样本船全年监测数据统计,获取了样本船生产数据以及淡水捕捞渔获物主要品种结构特征,采用营养级法评估了样本船捕捞生产的碳汇量为1516.65吨,其中江河捕捞渔业碳汇量为656.95吨,占比为43.32%;水库捕捞渔业碳汇量为859.7吨,占比为56.68%。利用样本船渔获物的品种结构数据,评估了2016年福建省淡水捕捞鱼类、虾类和贝类等渔获物形成的碳汇量为1758794.69吨,相应采用元素法的碳汇量评估结果仅为营养级法的0.63%。建议开展淡水捕捞渔业碳汇量评估方法专题研究,制定淡水捕捞渔业碳汇量评估标准。

Freshwater capture fisheries is an important part of the carbon sinks fisheries, academic discussion on the evaluation method of carbon sinks in freshwater capture fisheries is an important content. Based on the stratified sampling of fishing vessels produced in major freshwater capture fisheries in Fujian Province, the production data of the sample vessels and the structural characteristics of the main species of freshwater capture fisheries were obtained through the annual monitoring statistics of the sample vessels. The carbon sinks volume of the sample vessels was evaluated at 1516.65t by the trophic level method, and the carbon sinks volume of river capture fisheries was 656.95, accounting for 43.32%. The carbon sinks volume of the capture fisheries was 859.7t, accounting for 56.68%. Based on the data of species structure of the sample vessels, it was evaluated that the carbon sink of freshwater fish, shrimp and shellfish in Fujian Province in 2016 was 1758794.69t, and the result of the carbon sink evaluation by the elemental method is only 0.63% of the trophic level method. The paper proposes a special study on the evaluation of carbon sinks in freshwater capture fisheries, to make the evaluation standards for carbon sinks in freshwater capture fisheries.