Biological productivity front in the Changjiang Estuary and the Hangzhou Bay and its ecological effects

NING Xiu-ren; SHI Jun-xian; CAI Yu-ming; LIU Cheng-gang

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Article Navigation > Haiyang Xuebao > 2004 > 26(6): 96-106

NING Xiu-ren, SHI Jun-xian, CAI Yu-ming, LIU Cheng-gang. Biological productivity front in the Changjiang Estuary and the Hangzhou Bay and its ecological effects[J]. Haiyang Xuebao, 2004, 26(6): 96-106.

Citation:

NING Xiu-ren, SHI Jun-xian, CAI Yu-ming, LIU Cheng-gang. Biological productivity front in the Changjiang Estuary and the Hangzhou Bay and its ecological effects[J]. Haiyang Xuebao, 2004, 26(6): 96-106.

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Biological productivity front in the Changjiang Estuary and the Hangzhou Bay and its ecological effects

1.
Key Laboratory of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administratio, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
Key Laboratory of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administratio, Hangzhou 310012, China

Received Date: 2003-06-10
Rev Recd Date: 2003-12-08

Abstract

Abstract

Through analyzing of multidisciplinary oceanography data of a clear spatial zonation of the parameters and a primary productivity front are found in the study areas.In the turbid river mouth phytoplankton biomass and productivity are low,although the concentrations of nutrients,e.g,NO₃^-,PO₄^3-,etc.are high,but bacteria are active.On offshore ward,phytoplankton biomass and productivity increase gradually with suspended solids(SS)settling out.The maxima of phytoplankton parameters occur at about 100 km away from the river mouth and the east side of Zhoushan Archipelago,where SSconcentration is less than 5 mg/dm³ and salinity 25~30,which results in high concentration of dissolved oxygen,depletion of nutrients,particularly PO₄^3- in the upper layer and the dominance of young Synechococcus cells with smaller size,due to their fast growth there.The front of zooplankton biomaas is resulted from the abundant phytoplankton,as its food.
- biological productivity front,
- phytoplankton,
- ecological effects,
- redtides,
- Changjiang Estuary and Hangzhou Bay

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References(17)

References

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