College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Center, Beibu Gulf University, Pinglu Canal and Beibu Gulf Coastal Ecosystem Observation and Research Station of Guangxi, Qinzhou, Guangxi, China.
International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China.
Sci Total Environ. 2024 Aug 10;937:173538. doi: 10.1016/j.scitotenv.2024.173538. Epub 2024 May 25.
Many researchers have evaluated the fishery carbon sink potential of bivalve aquaculture, with most studies focusing on the Life Cycle Assessment (LCA) of individual bivalves, and there is currently no consensus on whether bivalves are carbon sinks or carbon sources. It is worth noting that most studies have not considered the impact of bivalve aquaculture on ecosystems when evaluating its carbon sink potential. In this context, based on existing literature, this article aims to comprehensively review the effects of bivalve aquaculture on carbon storage in the water column and sediment of aquaculture areas. In general, our findings revealed that moderate and low stocking densities of bivalve aquaculture do not lead to significant changes in the abundance of phytoplankton, but it does indeed alter the phytoplankton community structure from dominated by huge diatom with lower carbon densities to dominated by small phytoplankton with higher carbon densities. Therefore, bivalve aquaculture may increase the total carbon storage in the water column. In addition, bivalve aquaculture also increases the sedimentation rate of suspended particles, increasing the rate of carbon burial, especially in low-energy environment and shallow water areas. The findings of this article fill the knowledge gap of fishery carbon sink in bivalve aquaculture from an ecosystem perspective.
许多研究人员评估了双壳贝类养殖的渔业碳汇潜力，大多数研究集中在单个双壳贝类的生命周期评估 (LCA) 上，目前对于双壳贝类是碳汇还是碳源尚无共识。值得注意的是，在评估其碳汇潜力时，大多数研究都没有考虑双壳贝类养殖对生态系统的影响。在这种情况下，本文基于现有文献，旨在全面综述双壳贝类养殖对养殖区水柱和沉积物中碳储存的影响。总的来说，我们的研究结果表明，适度和低密度的双壳贝类养殖不会导致浮游植物丰度发生显著变化，但确实会改变浮游植物群落结构，使其由碳密度较低的大型硅藻主导转变为碳密度较高的小型浮游植物主导。因此，双壳贝类养殖可能会增加水柱中的总碳储量。此外，双壳贝类养殖还会增加悬浮颗粒的沉降速率，增加碳埋藏速率，尤其是在低能量环境和浅水区。本文的研究结果从生态系统角度填补了双壳贝类养殖渔业碳汇的知识空白。
