Coupling and Decoupling of High Biomass Phytoplankton Production and Hypoxia in a Highly Dynamic Coastal System: The Changjiang (Yangtze River) Estuary
文献类型：期刊论文
| 作者 | Zhou, Feng4; Chai, Fei5; Huang, Daji; Wells, Mark5; Ma, Xiao; Meng, Qicheng; Xue, Huijie5,6; Xuan, Jiliang; Wang, Pengbin1; Ni, Xiaobo |
| 刊名 | FRONTIERS IN MARINE SCIENCE
 |
| 出版日期 | 2020 |
| 卷号 | 7页码:259 |
| 关键词 | hypoxia diatom bloom Changjiang Estuary ROMS CoSiNE advection |
| 英文摘要 | The global increase in coastal hypoxia over the past decades has resulted from a considerable rise in anthropogenically-derived nutrient loading. The spatial relationship between surface phytoplankton production and subsurface hypoxic zones often can be explained by considering the oceanographic conditions associated with basin size, shape, or bathymetry, but that is not the case where nutrient-enriched estuarine waters merge into complex coastal circulation systems. We investigated the physical and biogeochemical processes that create high-biomass phytoplankton production and hypoxia off the Changjiang (Yangtze River) Estuary in the East China Sea (ECS). Extensive in situ datasets were linked with a coupled Regional Ocean Modeling Systems (ROMS) and carbon, silicate, and nitrogen ecosystem (CoSiNE) model to explain the temporary decoupling of phytoplankton production and hypoxia. The CoSiNE model contains two functional groupings of phytoplankton-diatoms and "other"-and the model results show that diatoms were the major contributors of carbon export and subsurface hypoxia. Both observations and simulations show that, although surface phytoplankton concentrations generally were much higher above hypoxic zones, highbiomass distributions during the summer-fall period did not closely align with that of the bottom hypoxic zones. Model results show that this decoupling was largely due to non-uniform offshore advection and detachment of subsurface segments of water underlying the Changjiang River plume. The near-bottom water carried organic-rich matter northeast and east of the major hypoxic region. The remineralization of this particle organic matter during transit created offshore patches of hypoxia spatially and temporally separated from the nearshore high-biomass phytoplankton production. The absence of high phytoplankton biomass offshore, and the 1-8 weeks' time lag between the surface diatom production and bottom hypoxia, made it otherwise difficult to explain the expanded core hypoxic patch and detached offshore hypoxic patches. The findings here highlight the value of developing integrated physical and biogeochemical models to aid in forecasting coastal hypoxia under both contemporary and future coastal ocean conditions. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18309]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 作者单位 | 1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China 2.Minist Nat Resources, Inst Oceanog 2, Key Lab Marine Ecosyst Dynam, Hangzhou, Peoples R China 3.Minist Nat Resources, Ningbo Marine Environm Monitoring Ctr Stn, Ningbo, Peoples R China 4.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China 5.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China 6.Univ Maine, Sch Marine Sci, Orono, ME 04469 USA |
| 推荐引用方式 GB/T 7714 | Zhou, Feng,Chai, Fei,Huang, Daji,et al. Coupling and Decoupling of High Biomass Phytoplankton Production and Hypoxia in a Highly Dynamic Coastal System: The Changjiang (Yangtze River) Estuary[J]. FRONTIERS IN MARINE SCIENCE,2020,7:259. |
| APA | Zhou, Feng.,Chai, Fei.,Huang, Daji.,Wells, Mark.,Ma, Xiao.,...&Li, Hongliang.(2020).Coupling and Decoupling of High Biomass Phytoplankton Production and Hypoxia in a Highly Dynamic Coastal System: The Changjiang (Yangtze River) Estuary.FRONTIERS IN MARINE SCIENCE,7,259. |
| MLA | Zhou, Feng,et al."Coupling and Decoupling of High Biomass Phytoplankton Production and Hypoxia in a Highly Dynamic Coastal System: The Changjiang (Yangtze River) Estuary".FRONTIERS IN MARINE SCIENCE 7(2020):259. |
入库方式： OAI收割
来源：南海海洋研究所
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