黄海、东海上层海水磷循环的同位素示踪研究

张远辉; 尹明端

黄海、东海上层海水磷循环的同位素示踪研究

国家海洋局海洋大气化学与全球变化重点实验室, 福建, 厦门, 361005;国家海洋局, 第三海洋研究所, 福建, 厦门, 361005

基金项目: 国家重点基础研究发展规划资助项目(G1999043704)

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出版历程
- 收稿日期: 2006-09-01
- 修回日期: 2006-12-11

Phosphorus cycling in the upper ocean of the East China Sea using natural ³²P and ³³P

Key Laboratory of Marine Atmospheric Chemistry and Global Change, Xiamen 361005, China;Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

摘要

摘要: 采用超低本底液闪β计数的方法,测定了春季黄海、东海海水中溶解态、悬浮物、筛绢颗粒物和雨水中天然³²P和³³P的比活度.结果显示,上层海水各相33P,32P的比活度相当低,其中TDP的³²P,³³P比活度的浓度最高,悬浮物次之,筛绢颗粒物最低.海水各相中³³P与³²P活度比值从TDP到悬浮物、筛绢颗粒物逐渐增大,反映出食物链传递过程中磷的年龄逐渐增加.根据稳态模式的估算结果,海水各相中磷的停留时间具有明显的区域变化特征,其中近岸和内陆架溶解磷的停留时间比外陆架短,仅为3~4 d,意味着近岸和内陆架海区低浓度的磷也可能维持高生物生产力的运转.利用稳态模式还估算出浮游植物的碳同化通量为189~814 mg/(m²·d),浮游动物的碳摄食通量为10~161 mg/(m²·d).此外,通过比较雨水³²P,³³P的输入通量和海水³²P,³³P积存量,利用质量平衡方法估算出上层海水POC输出通量为102~972 mg/(m²·d).
- ³²P /
- ³³P /
- 停留时间 /
- 吸收速率 /
- 输出通量 /
- 东海 /
- 黄海
Abstract: Natural activities of 32P (t_1/2=14.3 d) and ³³P (t_1/2=25.3 d) in total dissolved P(TDP), suspended particulate matter, net-plankt on and rainwater during the spring of 2001 were measured by anultra-low level liquid scintillation counter.A continuous steady-state model was used to estimate residence times of various phosphorus pools, uptake rates of the biological food chain within the upper ocean of the East China Sea.³²P/³³Pratios increased from the dissolved pools to the suspended matter and to net-plankton, reflecting that the age Of Pincreased as one moved up through the food chain.The residence time of P in the dissolved pools of coastal water and mid-shelfarea were very short (3~4 d), which suggests thatlow phosphorus concentrations could support relatively high levels of primary production.A phytoplankton assimilating flux of 189~814 mg/(m²·d) and a zooplankt on grazing flux of 10~161 mg/(m²·d) were also estimated and show that grazing rates of carbon correspo nded to 3%~20% of primary production.In addition, the particulate organic carbon fluxes from the upper ocean were calculated by directly comparing the measured seawater inventory of ³²P and ³³P with that measured in rain, and were found to range between 102 and 972 mg/(m²·d).
- ³²P /
- ³³P /
- residence time /
- uptake rate /
- export flux /
- East China Sea /
- Huanghai Sea

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参考文献(30)

HECKY R E,KILHAM P.Nutrient limitation of phytoplankton in freshwater and marine environments:A review of recent evidence on the effects of enrichment[J].Limnology and Oceanography,1988,33:796-822.

YIN K,QIAN P Y,WU M S,et al.Shift from P to N limitation of phytoplankton biomass across the Pearl River Estuarine plume during summer[J].Mar Ecol Prog Ser,2001,221:17-28.

张平,沈志良.营养盐限制的水域特征[J].海洋科学,2001,25(6):16-19.

CARACO N F.Disturbance of the marite phosphorus cycle:a case of indirect effects of human activity[J].Trends in Ecology &Evolution,1993,8:51-54.

NIXON S W.Nutrients and coastal waters:too much of a good thing?[J].Oceanus,1993,36:38-47.

BENITEZ-NELSON C R,BUESSELER K O.Temporal variability of inorganic and organic phosphorus turnover rates in the coastal ocean[J].Nature,1999,398:502-505.

LAL D,LEE T.Cosmogenic ³²p and ³³p used as tracers to study phosphorus recycling in the upper ocean[J].Nature,1988,333:752-754.

WASER N A D,BACON M P,MICHAELS A F.Natural activities of ³²P and ³³p and the ³³p/³²p ratio in suspended particulate matter and plankton in the Sargasso Sea[J].Deep Sea Research Ⅱ,1996,43:421-436.

林建云,傅天保.海水中磷的形态分析[A].海洋污染物分析方法[M].北京:海洋出版社,1992.74-78.

BENITEZ-NELSON C R,BUESSELER K O.Measurement of cosmogenic ³²p and ³³p activities in rainwater and seawater[J].Analytical Chemistry,1998,70:64-72.

LEE T,BARG E,LAL D.Studies of vertical mixing in the Southern Bight with cosmogenic radionuclides ³²p and ⁷Be[J].Limnology and Oceanography,1991,36:1044-1053.

ANGEL M V.Detrital organic fluxes through pelagic ecosystem[A].Flows of energy and materials in marine ecosystem[M].New York:Plenum Press,1984.475-516.

LONGHURST A R,HARRISON W G.Vertical nitrogen flux from the oceanic euphotic zone by diel migrant zooplankton and nekton[J].Deep Sea ResearchⅡ,1988,40:903-924.

WASER N A D,BACON M P.Wet deposition fluxes of cosmogenic ³²p and ³²p and variations in the ³²p/³²p ratio at Bermuda[J].Earth and Planetary Science Let t ers,1995,133:71-80.

BENITEZ-NELSON C R,KARL D M.Phosphorus cycling in the North Pacific Subtropical Gyre using cosmogenic ³²P and ³³p[J].Limnology and Oceanography,2002,47:762-770.

MICHAELS A F,SILVER M W.Primary production,sink fluxes and the microbial food web[J].Deep Sea Research Ⅱ,1988,35:473-490.

陈清潮,陈亚瞿,胡雅竹.南黄海和东海浮游生物群落的初步探讨[J].海洋学报,1980,2(2):149-157.

孟凡,黄凤朋,马兆党,等.黑潮及其邻近海域浮游动物的初步报告[A].黑潮调查研究论文选(一)[M].北京:海洋出版社,1990.97-105.

MARSHALL S M,CONOVER R J,ORR A P.On the biology of Calanus finmarchicus:Ⅻ.The phosphorus cycle:excretion,egg production,and autolysis[J].Journal of the Marine Biological Association of the United Kingdom,1961,41:463-488.

POMEROY L R,MATHEWS H M,MIN H S.Excretion of phosphate and soluble organic phosphorus compounds by zooplankton[J].Limnology and Oceanography,1963,8:50-55.

STOCKNER J G,SHORTREED K S.Algal picoplankton production and contribution to food webs in oligotrophic British Columbia lakes[J].Hydrobiology,1989,173:151-166.

HANEY J F.An in situ method for the measurements of zooplankton grazing rates[J].Limnology and Oceanography,1971,16:970-977.

PERRY M J,EPPLEY R W.Phosphate uptake by phytoplankton in the central North Pacific Ocean.the central North Pacific Ocean[J].Deep Sea Research I,1981,28:39-49.

宁修仁,刘子琳,史君贤.渤海、黄海、东海初级生产力和潜在渔业生产量的评估[J].海洋学报,1995,17(3):72-84.

WILLIAMS P J L B,LEFEVRE D.Algal ¹⁴C and total carbon metabolisms.1.Models to account for the physiological processes of respiration and recycling[J].Journal of Plankton Research,1996,18:1941-1959.

DODDS W K,PRISCU J C.Ammonium,nitrate,phosphate,and inorganic carbon uptake in an oligotrophic lake:seasonal variations among light response variables[J].Journal of Phycology,1989,25:499-705.

CORNER E D S.Phosphorus in marine zooplankton[J].Water Research,1973,7:93-100.

CALBET A.Mesozooplankton grazing effect on primary production:A global comparative analysis in marine ecosystems[J].Limnology and Oceanography,2001,46:1 824-1 830.

BUESSELER K O,ANDREWS J A,HARTMAN M C,et al.Regional estimates of the export flux of particulate organic carbon derived from Thorium-234 during the JGOFS EQPAC program[J].Deep-Sea ResearchⅡ,1995,42:777-804.

焦念志,王荣,李超伦.东海春季初级生产力与新生产力的研究[J].海洋与湖沼,1998,29(2):135-139.

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