基于直接碳汇核算的长三角地区海水贝类养殖发展分析

Development Analysis of Shellfish Aquaculture in the Yangtze River Delta Region Based on the Principle of Direct Carbon Sinks Accounting

海水贝类养殖是形成渔业碳汇的重要途径之一。以海水贝类养殖直接碳汇核算原理为基础,通过对2010年全国海水贝类养殖直接碳汇进行核算,得出以下结论:(1)2010年我国海水贝类养殖直接碳汇总量约97×104t,其中,按省区排序,山东省位居第一,而按品种排序,牡蛎则是主要来源;(2)长三角地区海水贝类养殖直接碳汇量不具有优势,仅占总量的11.58%。为了提高长三角地区碳汇渔业发展地位,以相应海区养殖容量为基础,提出两点建议:一是借助地区内外两种资源,提高长三角地区海水贝类养殖产量;二是在现有养殖产量基础上,通过优化海水贝类养殖结构,提高贻贝养殖比重以实现增汇,据估算,养殖结构调整可使江苏、浙江两省碳汇量分别提高到18 703.87 t和9 048.56 t。

Shellfish aquaculture is an important way to produce fisheries carbon sinks. Based on the principle of direct carbon sinks accounting, the carbon sinks of shellfish aquaculture in 2010 were estimated in this paper, and the conclusions were as follows. （ 1 ） The amount of carbon sinks of shellfish aquaculture was 970 000 tons in 2010 ; Shandong had the highest carbon sinks according to provinces, and oyster was the main source of carbon sinks according to aquaculture species. （2） The direct carbon sinks of shellfish aquaculture in Yangtze River Delta region was only 11.58% of total, which did not have an advantage compared with other provinces~ and regions. Then based on the maricuhure capacity in corresponding sea area, two suggestions were given to improve the development of carbon sink fishery in Yangtze River Delta region, including to increase the shellfish aquaculture production utilizing two types of inside and outside resources, and to increase the pro- portion of mussel aquaculture production and optimize structures of shellfish aquaculture. According to estima- tion, in the case of constant production, the carbon sinks of Jiangsu and Zhejiang could reach to 18 703.87 tons and 9 048.56 tons.