| ZHENG Guoxia,SONG Jinming,DAI Jicui,WANG Yiming. 2006. Distributions of chlorophyll a and carbon fixed strength of phyto-plankton in autumn of the southern Huanghai Sea waters. Acta Oceanologica Sinica, (3):68－81 |
| Distributions of chlorophyll a and carbon fixed strength of phyto-plankton in autumn of the southern Huanghai Sea waters |
| Distributions of chlorophyll a and carbon fixed strength of phyto-plankton in autumn of the southern Huanghai Sea waters |
| Received:January 06, 2006 Revised:March 28, 2006 |
| DOI： |
| Key words:chlorophyll a primary productivity carbon fixed strength southern Huanghai Sea |
| 中文关键词: chlorophyll a primary productivity carbon fixed strength southern Huanghai Sea |
| 基金项目: |
| Author Name | Affiliation | E-mail | | ZHENG Guoxia | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Graduate School, Chinese Academy of Sciences, Beijing 100039, China | | | SONG Jinming | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | mjsong@ms.qdio.ac.cn | | DAI Jicui | Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Graduate School, Chinese Academy of Sciences, Beijing 100039, China | | | WANG Yiming | Zhoushan Marine Eco-environmental Monitoring Station in Zhejiang Province, Zhoushan 316004, China | |
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| Abstract: |
| Chlorophyll a (Chl a) concentration and primary productivity (PP), namely, carbon fixed strength of phytoplankton along four transects in the southern Huanghai Sea (SHS) were studied for their distribution features and controlling mechanisms based on the investigations from 17 October to 3 November 2005. The Chl a concentration in the study waters dynamically changed spatially.Surface Chl a concentrations ranged from 0.11 to 2.38 mg/m3 with higher and lower values observed in the nutrient-laden inshore waters and central part of the SHS occupied by oligotrophic current, respectively. The vertical distribution of Chl a concentration showed a predominant pattern of subsurface concentration maximum profile. It followed the previous result of the deep dissolved oxygen concentration maximum profile, which was significantly correlated with phytoplankton and regional water mass. The primary productivity of carbon in autumn of the SHS, ranging from 95 to 1 634 mg/(m2·d) mainly varied with nutrient condition, especially phosphate concentration in seawater and hydrological condition. Furthermore, associating the present study results together with previous studies, the annual value of carbon fixed production of phytoplankton in the entire marginal seas of East China(including the Bohai Sea, the Huanghai Sea and the East China Sea) was estimated to be 222 Mt, which accounted for 2% of that in the global margins. Besides, it was as 16.2 times as the annual value of apparent carbon sink strength (13.96 Mt) in the marginal seas of East China. This multiple was different in different sea areas (3.0 in the Bohai Sea, 6.7 in the Huanghai Sea and 81.6 in the East China Sea). |
| 中文摘要: |
| Chlorophyll a (Chl a) concentration and primary productivity (PP), namely, carbon fixed strength of phytoplankton along four transects in the southern Huanghai Sea (SHS) were studied for their distribution features and controlling mechanisms based on the investigations from 17 October to 3 November 2005. The Chl a concentration in the study waters dynamically changed spatially.Surface Chl a concentrations ranged from 0.11 to 2.38 mg/m3 with higher and lower values observed in the nutrient-laden inshore waters and central part of the SHS occupied by oligotrophic current, respectively. The vertical distribution of Chl a concentration showed a predominant pattern of subsurface concentration maximum profile. It followed the previous result of the deep dissolved oxygen concentration maximum profile, which was significantly correlated with phytoplankton and regional water mass. The primary productivity of carbon in autumn of the SHS, ranging from 95 to 1 634 mg/(m2·d) mainly varied with nutrient condition, especially phosphate concentration in seawater and hydrological condition. Furthermore, associating the present study results together with previous studies, the annual value of carbon fixed production of phytoplankton in the entire marginal seas of East China(including the Bohai Sea, the Huanghai Sea and the East China Sea) was estimated to be 222 Mt, which accounted for 2% of that in the global margins. Besides, it was as 16.2 times as the annual value of apparent carbon sink strength (13.96 Mt) in the marginal seas of East China. This multiple was different in different sea areas (3.0 in the Bohai Sea, 6.7 in the Huanghai Sea and 81.6 in the East China Sea). |
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