中国海洋大学学报（自然科学版）2025，Vol.55Issue(12)：92-103,12.DOI:10.16441/j.cnki.hdxb.20240393
桑沟湾浮游植物生产力和群落结构的演变特征及影响因素
The Long-Term Change Patterns and Controlling Factors of Phytoplankton Productivity and Community Structure in Sanggou Bay
摘要
Abstract
Coastal bays are important carbon sink areas.The productivity and community structure of the main primary producer,phytoplankton,are significantly affected by human activities.Understand-ing the long-term change patterns of phytoplankton productivity and community structure in typical bays is an important basis for clarifying the influence of phytoplankton on the carbon sink function of bays.Sanggou Bay is one of the most representative farming areas in China.However,the long-term change patterns and controlling factors of phytoplankton productivity and community structure under different aquaculture conditions in Sanggou Bay are still unclear.In this study,we analyzed sediment cores at four stations in Sanggou Bay(i.e.,stations B2 and C2 in the shellfish culture area,station B4 in the shellfish-kelp integrated culture area,and station A6 in the area without aquaculture)to investi-gate the long-term change patterns and controlling factors of phytoplankton productivity and community structure.Our results showed that phytoplankton productivity in the shellfish culture area showed an increasing trend,which might be related to the terrestrial input and the increased activities of shellfish culture(accelerated dissolved inorganic nitrogen(DIN)cycling).Phytoplankton productivity in the shellfish-kelp integrated culture area showed a hump-shaped change,which was significantly influenced by the change in DIN(p<0.05)and the integrated culture of shellfish and kelp.Phytoplankton produc-tivity in the area without aquaculture was relatively low,while it showed an upward trend from the 5 cm sediment layer to the surface,which might be attributed to the increased DIN and changes in hydrody-namics.Overall,there were significant regional differences in phytoplankton productivity,that is,phy-toplankton productivity was significantly higher in the shellfish-kelp integrated culture area than the area without aquaculture during the last 40 years(p<0.05),and it was significantly higher in the shellfish-kelp integrated culture area than the shellfish culture area during the last 10 years(p<0.05).Our re-sults indicate that the shellfish-kelp integrated culture model has significant potential for oceanic organic carbon sink.In addition,the productivity ratio of diatoms to dinoflagellates in Sanggou Bay showed an overall upward trend,which may be influenced by the decreased ratio of nitrogen to phosphorus(N/P),the increased ratio of silicon to nitrogen(Si/N),the increased dissolved organic phosphorus(DOP),the decreased temperature,aquaculture activities,and hydrodynamic changes.The above findings provide a scientific basis for further elucidating the carbon sink potential of aquaculture bays.关键词
类脂生物标志物/硅藻/甲藻/营养盐浓度/氮磷比值/水产养殖Key words
lipid biomarkers/diatoms/dinoflagellates/nutrient concentrations/nitrogen to phosphor-us ratio/aquaculture分类
海洋学引用本文复制引用
徐淑兰,毕蓉,丁杨,张海龙,彭松,肖晓彤,崔家璇,李莉,赵美训..桑沟湾浮游植物生产力和群落结构的演变特征及影响因素[J].中国海洋大学学报（自然科学版）,2025,55(12):92-103,12.基金项目
崂山实验室科技创新项目(LSKJ202204005) （LSKJ202204005）
国家自然科学基金项目(U24A20611) （U24A20611）
中国科学院海洋大科学研究中心重点部署项目(COMS2019Q05)资助 Supported by Science and Technology Innovation Project of the Laoshan Laboratory(LSKJ202204005) （COMS2019Q05）
the National Natural Science Foundation of China(U24A20611) （U24A20611）
the Key Deployment Project of Centre for Ocean Mega-Research of Science,Chinese Academy of Sciences(COMS2019Q05) （COMS2019Q05）
