浙江省海水贝藻养殖碳汇能力测算及时空演化

An estimation of carbon sink capacity of shellfish and algae culture and its spatio-temporal evolution in Zhejiang Province

中国是世界第一海水养殖大国,充分利用海洋贝藻生物的碳汇功能是加快实现"碳中和"的重要路径。本文计算了2005-2019年浙江省海水贝藻养殖碳汇能力,并进行时空演化分析。结果表明:(1)2005-2019年浙江省海水贝藻养殖碳汇总量呈现先下降后增长的趋势,台州贡献最大,舟山增速最快;(2)2005-2019年浙江省海水贝藻养殖碳汇效率保持在7.9%-8.7%之间,2013-2019年均高于全国平均水平;(3)2005-2019年浙江省海水贝藻养殖碳汇经济价值整体呈上升趋势,2017年突破首次2亿元。未来,浙江省应着力于完善贝藻碳汇核算体系、海洋渔业低碳发展、贝藻养殖增产增收、搭建贝藻碳汇交易市场、建设生态海洋牧场等方面。

China is the world’s largest mariculture country,making full use of the carbon sink function of marine shellfish and algae is an important way to accelerate the realization of carbon neutralization target.This paper calculates the carbon sink capacity of shellfish and algae culture in Zhejiang Province from 2005 to 2019,and its spatio-temporal evolution.The results show that:(1)From 2005 to 2019,the aggregate amount of marine shellfish and algae culture carbon in Zhejiang Province showed a trend of first decline and then increase,with Taizhou contributing the most and Zhoushan growing the fastest;(2)From 2005 to 2019,the carbon sink efficiency of marine shellfish and algae culture in Zhejiang Province remained between 7.9%and 8.7%,which were higher than the national average in 2013-2019;(3)From 2005 to 2019,the overall economic value of carbon sequestration of marine shellfish and algae culture in Zhejiang Province showed an upward trend,and exceeded 200 million yuan for the first time in 2017.In the future,Zhejiang Province should focus on improving the shellfish and algae carbon sequestration accounting system,low-carbon development of marine fisheries,increasing production and income of shellfish and algae breeding,building shellfish and algae carbon sequestration trading market,building ecological marine pasture,etc.