文献类型： 外文期刊

作者： Peng, Song ¹ ; Bi, Rong ¹ ; Liu, Jiwen ³ ; Cui, Jiaxuan ¹ ; Fu, Xinkai ¹ ; Xiao, Xiaotong ¹ ; Li, Ruihuan ⁶ ; Jiang, Zengjie ⁶ ; Xu, Shulan ¹ ; Zhang, Chuanli ¹ ; Zhang, Xiao-Hua ³ ; Zhao, Meixun ¹ ;

作者机构： 1.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao 266100, Peoples R China

2.Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, Qingdao 266100, Peoples R China

3.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China

4.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao 266003, Peoples R China

5.Ocean Univ China, Coll Marine Life Sci, Qingdao 266003, Peoples R China

6.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Peoples R China

7.Laoshan Lab, Qingdao 266237, Peoples R China

关键词： Bacterial community structure; Phytoplankton; Carbon cycle; Intensive aquaculture activities; Coastal bays

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： 2025 年 204 卷

页码：

收录情况： SCI

摘要： Coastal bays link terrestrial and oceanic carbon reservoirs and play important roles in marine carbon cycles. Particulate organic carbon (POC) produced by phytoplankton is a major autochthonous carbon source in coastal bays. Previous studies on the fate of POC produced by phytoplankton mainly focused on the relationship between phytoplankton and zooplankton in classic food webs, while our knowledge on the roles of bacterioplankton is still limited, particularly in bays under highly intensive aquaculture activities. Here, we investigated bacterial community structure, and the influence of environmental factors and phytoplankton biomass and community structure based on samples collected in August 2022 from Sanggou Bay, a typical aquaculture bay in northern China. Environmental conditions, phytoplankton and bacterial community structure differed significantly between different aquaculture areas, showing higher relative abundance of Synechococcus sp. in the mixing area of shellfish and kelp culture (Area II) than the shellfish culture area (Area I). In contrast, Marivita cryptomonadis was more abundant in Area I, associated with elevated dissolved inorganic nitrogen (DIN), POC, POC/PN (the molar ratio of POC to particulate nitrogen) and sterol-derived total phytoplankton biomass. The strong correlation between total phytoplankton biomass and particle-associated bacteria indicated the important role of this bacterial fraction in processing organic compounds produced by phytoplankton. Significant correlations between bacterial community composition and POC/PN suggested more organic carbon potentially entering detrital biomass pools in Area I compared to Area II. Our results suggest that spatial distribution patterns of bacterial community structure were regulated by multiple abiotic and biotic factors and had a profound impact on the fate of organic carbon under highly intensive aquaculture activities in Sanggou Bay.