| 摘要 |
[Objectives] To assess the carbon sink capacity in seawater suspension cage aquaculture of shellfish in Tianjin from 2015 to 2022. [Methods] The carbon sink capacity of different shellfish species was evaluated using both physical and value assessment methods. [Results] The shellfish cultivated in seawater suspension cages in Tianjin exhibited a significant capacity for carbon sinks. The amounts of carbon removed by suspension cage aquaculture of Rapana venosa, Crassostrea gigas, Scapharca subcrenata, Scapharca broughtonii and Argopectens irradias were 448.297, 403.398, 89.463, 40.657, and 106.719 t, respectively. Furthermore, the total volume of shellfish cultivated in seawater exhibited a consistent upward trend over time, correlating with an annual increase in the amount of carbon removed. Among the shellfish cultivated in seawater suspension cages, the order of carbon sink capacity was as follows: C. gigas>R. venosa>A. irradias>S. subcrenata and S. broughtonii. In terms of the carbon sink capacity of soft tissues, the ranking was as follows: A. irradias>R. venosa>C. gigas>S. subcrenata and S. broughtonii. The structural and yield factors associated with seawater suspension cage aquaculture of shellfish significantly influenced the enhancement of the total carbon sink of cultivated shellfish. Notably, structural factors had a greater impact on the increase in the carbon sink of cultivated shellfish compared to total yield factors. [Conclusions] The findings will serve as a reference for enhancing the carbon sink potential of fisheries and achieving sustainable development in seawater aquaculture in Tianjin. |
