| Yu Xiaoyong,Xu Jie,Long Aimin,Li Ruihuan,Shi Zhen,Li Qian P. 2020. Carbon-to-chlorophyll ratio and carbon content of phytoplankton community at the surface in coastal waters adjacent to the Zhujiang River Estuary during summer. Acta Oceanologica Sinica, 39(2):123－131 |
| Carbon-to-chlorophyll ratio and carbon content of phytoplankton community at the surface in coastal waters adjacent to the Zhujiang River Estuary during summer |
| 夏季珠江口邻近海域表层浮游植物的碳叶绿素比值及其碳含量 |
| Received:April 11, 2018 |
| DOI：10.1007/s13131-020-1556-6 |
| Key words:chlorophyll a particulate organic carbon biogenic silica phytoplankton carbon diatoms |
| 中文关键词: 叶绿素a 颗粒有机碳 生物硅 浮游植物碳 硅藻 |
| 基金项目:The National Natural Science Foundation of China under contract No. 41476137; the project of Qingdao National Laboratory for Marine Science and Technology under contract No. QNLM2016ORP0305. |
| Author Name | Affiliation | E-mail | | Yu Xiaoyong | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | Xu Jie | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | xujie@scsio.ac.cn | | Long Aimin | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | Li Ruihuan | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China | | | Shi Zhen | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China | | | Li Qian P | State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanography, Chinese Academy of Sciences, Guangzhou 510301, China
University of Chinese Academy of Sciences, Beijing 100049, China | |
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| Abstract: |
| Chlorophyll a (Chl a), particulate organic carbon (POC) and biogenic silica (BSi) were determined in coastal waters adjacent to the Zhujiang (Pearl) River Estuary (ZRE) during summer, in order to examine the C:Chl a ratio of phytoplankton and phytoplankton carbon in the plume-impacted coastal waters during summer, as well as to assess the relative contribution of diatoms to the phytoplankton biomass, by the regression between Chl a, POC and BSi. Our results showed that the C:Chl a ratio (g/g) of phytoplankton was high (up to 142), likely due to high light intensity and nutrient limitation. The river plume input stimulated phytoplankton growth, especially diatoms, resulting in higher relative contribution of phytoplankton carbon (55%) and diatoms (34%) to POC in the plume-impacted region?????????????? than those (33% and 13%) in high salinity area, respectively. Phytoplankton carbon (up to 538 μg/L) in the plume-impacted region was much higher than that (<166 μg/L) in high salinity area. Our findings were helpful to improve the biogeochemical model in coastal waters adjacent to the ZRE. |
| 中文摘要: |
| 为了认知受冲淡水影响近岸海域浮游植物C：Chl a比值及其碳含量，以及硅藻对浮游植物生物量的贡献，我们分析了夏季珠江口邻近海域表层叶绿素a（Chl a），颗粒有机碳（POC）和生物硅（BSi），并运用Chl a、POC和BSi之间的线性回归，结果显示，表层浮游植物C：Chl a比值高达142 g·g-1，可能与强光照和营养盐限制有关。在受珠江冲淡水影响的海域，冲淡水促进了浮游植物生长，特别是硅藻，使浮游植物和硅藻对POC的贡献达55%和34%，高于高盐度海域（33%和13%）。冲淡水影响海域表层浮游植物的碳最高达538 μg/L，明显高于未受冲淡水影响的高盐度海域（166 μg/L）。该研究发现可能对改进珠江口近岸海域的生物地球化学模型有科学意义。 |
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