| Size fractionated biomass and productivity of phytoplankton and new production in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer 1998/1999 |
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| 作者姓名： | Cai Yuming Ning Xiuren Zhu Genghai Shi Junxian |
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| 作者单位： | Cai Yuming 1，3，Ning Xiuren 1，2，3，Zhu Genghai3，Shi Junxian3 1. Key Laborary of Submarine Geosciences of State Oceanic Administration，Hangzhou 310012，China. 2. Key Laborary of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration，Hangzhou 310012，China 3. Second Institute of Oceanography of State Oceanic Administration，Hangzhou 310012，China |
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| 基金项目： | ThisprojectwassupportedbyNationalNaturalScienceFoundationofChinaundercontractNo .4 9876 0 32 . |
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| 摘 要： | INTRODUCTIONComparedwithotheroceansintheworld ,thereisrelativelyhigherlevelofnutrients (ni trate ,phosphate ,silicate)intheSouthernOcean .Butprimaryproductivitiesarelow ,andnewproductionisalsoonlyinthemiddlelevelthere .Itiscommonlyconsideredthatthelowerpro ductivitiesintheSouthernOceaniscausedbylowtemperature ,lowlight,lowstabilityofwa ter,scarcityoftraceelementsuchasironandgrazingbyzooplankton (Burkilletal.,1 995) ,etc.ThemostexistedstudiesconcentratedontheAtlanticSectoroftheSouthernO…
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| 关 键 词： | Phytoplankton standing stock primary productivity size-fractionation new production the Southern Ocean |
| 收稿时间： | 2002/5/20 0:00:00 |
| 修稿时间： | 2002/9/12 0:00:00 |
Size fractionated biomass and productivity of phytoplankton and new production in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer 1998/1999 |
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| Cai Yuming,Ning Xiuren,Zhu Genghai,Shi Junxian.Size fractionated biomass and productivity of phytoplankton and new production in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer 1998/1999[J].Acta Oceanologica Sinica,2003,22(4):651-670. |
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| Authors: | Cai Yuming Ning Xiuren Zhu Genghai and Shi Junxian |
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| Institution: | Key Laborary of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography of State Oceanic Administration, Hangzhou 310012, China;Key Laborary of Submarine Geosciences of State Oceanic Administration, Hangzhou 310012, China;Key Laborary of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography of State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | The paper deals with the studies on the cell abundance, the composition of dominant species, size fractionated biomass and productivity of phytoplankton, new production, the environmentally restricted mechanism in the Prydz Bay and the adjacent Indian sector of the Southern Ocean during the austral summer 1998/1999. The results showed that there was marked feature of spatial zonation in the sea areas investigated. In the Prydz Bay and its adjacent continental shelf, the biomass and productivity of phytoplankton were high; those of continental slope and open ocean area were obviously low.The nutrient concentration had opposite distribution trend, due to the consumption of phytoplankton. It mainly affected by the vertical stability of water column, grazing pressure of zooplankton, temperature and light etc. The results of size-fractionation showed that the average contribution of netplankton to total chlorophyll a in studied sea areas was 52.2 %, those of nano- and picoplankton were 29.4 % and 18.4 %, respectively. The average contribution of netplankton to total primary production was 52.4 %,those of nano- and picoplankton were 28.7% and 18.9%, separately. It is same as previous conclusion that the contribution of picoplankton to productivity is slightly larger than that to biomass of phytoplankton communities. The average new production and f-ratio were 230.6 mg/ (m2 ·d) and 0.43, respectively. |
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| Keywords: | Phytoplankton standing stock primary productivity size-fractionation new production the Southern Ocean |
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