Large-scale oyster farming accelerates the removal of dissolved inorganic carbon from seawater in Sanggou Bay
文献类型： 外文期刊
作者： Li, Jiaqi 1 ; Jiang, Zengjie 1 ; Zhang, Meng 1 ; Sun, Xin 1 ; Jiao, Minghui 1 ; Li, Jiamin 1 ; Xue, Suyan 1 ; Li, Ang 1 ; Liu, Longzhen 1 ; Zhu, Ling 1 ; Mao, Yuze 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Peoples R China
2.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao 266237, Shandong, Peoples R China
关键词： Oyster farming; Dissolved inorganic carbon removal; Aquaculture; Seawater carbonate chemistry
期刊名称：MARINE ENVIRONMENTAL RESEARCH （ 影响因子：3.2； 五年影响因子：3.3 ）
ISSN： 0141-1136
年卷期： 2024 年 202 卷
页码：
收录情况： SCI
摘要： While the direct impact of oyster calcification and respiration on the seawater inorganic carbon system is well-acknowledged, their indirect effect through filter feeding activities remains unclear. Here we studied the impact of large-scale oyster farming on the removal of dissolved inorganic carbon (DIC) from seawater. Field investigations showed that the DIC level in the oyster farming area in Sanggou Bay, China were significantly lower than that in the non-farming area. In-lab incubation showed that regardless of whether incubated in high or low-transparent environments, the DIC removal rate of seawater from the oyster farming area was significantly higher than that of the non-farming area. These results indicate that cultivated oysters facilitate the removal of seawater DIC in the farming area. To reveal the indirect effect of filter feeding activities on DIC removal, we used 6-m(3) ponds to simulate the oyster-farming environment. Results showed that the average DIC level of the oyster-cultivating groups was 105.83 mu mol/kg lower than that of the control groups (without of oyster) after a six-day cultivation. Surprisingly, the average concentration of Chl-a in oyster-cultivating groups was significantly higher than that of the control group at the end of the experiment. Similarly, DIC level declined faster while Chl-a concentration increased faster in seawater that previously experienced 12 similar to 20 h of oyster cultivation than that in the control seawater. It was noticed that the transparency of seawater within 6-m(3) ponds increased significantly just after hours of oyster cultivation. This enhanced transparency created a favorable light environment that supported phytoplankton photosynthesis and simultaneously accelerated the DIC removal rate. Overall, oysters not only remove the inorganic carbon in the seawater through calcification but also create a suitable environment for phytoplankton photosynthesis through their filtering activity, and subsequently accelerating the removal of inorganic carbon in the seawater of the oyster farming area.
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