Distributions of chlorophyll-a and carbon fixed strength of phytoplankton in autumn of the southern Huanghai Sea waters

ZHENG Guo-xia; SONG Jin-ming; DAI Ji-cui; WANG Yi-ming

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ZHENG Guo-xia, SONG Jin-ming, DAI Ji-cui, WANG Yi-ming. Distributions of chlorophyll-a and carbon fixed strength of phytoplankton in autumn of the southern Huanghai Sea waters[J]. Haiyang Xuebao, 2006, 28(3): 109-118.

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Distributions of chlorophyll-a and carbon fixed strength of phytoplankton in autumn of the southern Huanghai Sea waters

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;The Graduate School, Chinese Academy of Sciences, Beijing 100039, China
2.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
3.
Zhoushan Marine Eco-environmental Monitoring Station in Zhejiang Province, Zhoushan 316004, China

Received Date: 2006-01-06
Rev Recd Date: 2006-02-28

Abstract

Abstract

Chlorophyll-a(Chl a)concentration,primary productivity and carbon fixed strength in the southorn Huanghai Sea(SYS)were examined for their distribution features and biogeochemical mechanisms based on the investigations along four transects in October and November 2005.The Chl a concentration in surface waters ranged from 0.11 to 2.38 mg/m³ with a mean of 0.66 mg/m³,which was much higher than that in the 50 m layer.Owing to a good seawater exchange induced by strong hydrodynamic process in the SYS,the Chl a distributions in the surface and 20m layer were generally similar with high values observed in nutrient-laden inshore waters.However, in the middle of the southern Huanghai Sea where was occupied by the currents from the East China Sea characterized hylow nutrients contents,the Chl a concent rations were correspondingly low.As for the vertical distributions of Chl a in the southern Huanghai Sea,the deep Chl a maximum profile was the predominant pattern.It followed the previous result of the deep dissolved oxygen maximum profile,which was significantly correlated with phytoplankt on and regional water mass.
- chlorophyll-a,
- primary productivity,
- carbon fixed strength,
- southern Huanghai Sea

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