Importance of planktonic community respiration on the carbon balance of the East China Sea in summer

被引:48
作者
Chen, Chung-Chi
Chiang, Kuo-Ping
Gong, Gwo-Ching
Shiah, Fuh-Kwo
Tseng, Chun-Mao
Liu, Kon-Kee
机构
[1] Natl Taiwan Normal Univ, Dept Life Sci, Taipei 116, Taiwan
[2] Natl Taiwan Ocean Univ, Inst Marine Environm Chem & Ecol, Chilung 20224, Taiwan
[3] Natl Taiwan Ocean Univ, Dept Environm Biol & Fisheries Sci, Chilung, Taiwan
[4] Natl Taiwan Univ, Natl Ctr Ocean Res, Taipei 106, Taiwan
[5] Natl Cent Univ, Inst Hydrol Sci, Jhongli 320, Taiwan
关键词
D O I
10.1029/2005GB002647
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
[ 1] The East China Sea (ECS) is one of the largest continental shelves in the world; however, the role that biota plays in the carbon fluxes of this shelf ecosystem is still obscure. To evaluate the organic carbon balance and the roles played by planktonic communities in organic carbon consumption, two cruises with stations covering almost the entire shelf were conducted during the high productivity and high river flow season of the ECS in June ( the early summer) and August ( the middle summer) 2003. Results showed that biological activity was significantly higher in the early summer. To flourish in the early summer, plankton need a significant fluvial input of dissolved inorganic nutrients and organic matter from the Chinese coast, especially from the Changjiang ( aka Yangtze River), might be one of the main driving forces. Further analysis showed that most planktonic community respiration (PCR) could be attributed to phytoplankton and bacterioplankton, which accounted for over 96% of the total planktonic biomass ( in carbon units) in summer. This might partially explain why mean PCR was higher in June ( similar to 114 mg C m(-3) d(-1)), with higher phytoplankton biomass, than in August ( similar to 40 mg m(-3) d(-1)). The ratio of integrated primary production to PCR (i.e., the P/R ratio) was, however, less than 1, with a mean +/- SD value of 0.35 +/- 0.41 for all the pooled data. This indicates a significant amount of organic carbon has been regenerated through planktonic activity in the water column. The sea-air difference in fCO(2), however, changed from a mean value of - 64.5 +/- 61.3 ppm in June to 10.0 +/- 37.5 ppm in August. To explain the contradictory results between PCR and fCO(2), we suggest that the dissolved inorganic carbon regenerated through planktonic respiration could be stored in the subsurface layer and may affect the fCO(2) in the surface water, which is what controls the shelf sea either as an atmospheric CO(2) sink or as a source, depending on the prevailing physical forces. These results also suggest that the controversy between atmospheric CO(2) sink or source in the ECS shelf needs further exploration.
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共 69 条
[1]   PLANKTON RESPIRATION AND CARBON FLUX THROUGH BACTERIOPLANKTON ON THE LOUISIANA SHELF [J].
BIDDANDA, B ;
OPSAHL, S ;
BENNER, R .
LIMNOLOGY AND OCEANOGRAPHY, 1994, 39 (06) :1259-1275
[2]   Budgeting sinks and sources of CO2 in the coastal ocean:: Diversity of ecosystems counts -: art. no. L14601 [J].
Borges, AV ;
Delille, B ;
Frankignoulle, M .
GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (14) :1-4
[3]   Do we have enough pieces of the jigsaw to integrate CO2 fluxes in the coastal ocean? [J].
Borges, AV .
ESTUARIES, 2005, 28 (01) :3-27
[4]   Phytoplankton growth, microzooplankton grazing, and carbon cycling in marine systems [J].
Calbet, A ;
Landry, MR .
LIMNOLOGY AND OCEANOGRAPHY, 2004, 49 (01) :51-57
[5]   CARBON INPUTS AND DISTRIBUTION IN ESTUARIES OF TURBID RIVERS - THE YANGTZE AND YELLOW RIVERS (CHINA) [J].
CAUWET, G ;
MACKENZIE, FT .
MARINE CHEMISTRY, 1993, 43 (1-4) :235-246
[6]   Cross-shelf variation in carbon-to-chlorophyll a ratios in the East China Sea, summer 1998 [J].
Chang, J ;
Shiah, FK ;
Gong, GC ;
Chiang, KP .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2003, 50 (6-7) :1237-1247
[7]   Photosynthetic picoplankton in French Polynesian atoll lagoons: estimation of taxa contribution to biomass and production by flow cytometry [J].
Charpy, L ;
Blanchot, J .
MARINE ECOLOGY PROGRESS SERIES, 1998, 162 :57-70
[8]   Phytoplankton and bacterioplankton biomass, production and turnover in a semi-enclosed embayment with spring tide induced upwelling [J].
Chen, CC ;
Shiah, FK ;
Lee, HJ ;
Li, KY ;
Meng, PJ ;
Kao, SJ ;
Tseng, YF ;
Chung, CL .
MARINE ECOLOGY PROGRESS SERIES, 2005, 304 :91-100
[9]   Planktonic community respiration in the East China Sea: importance of microbial consumption of organic carbon [J].
Chen, CC ;
Shiah, FK ;
Gong, GC ;
Chiang, KP .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2003, 50 (6-7) :1311-1325
[10]   COMPARISON OF WINTER AND SUMMER HYDROGRAPHIC OBSERVATIONS IN THE YELLOW AND EAST CHINA SEAS AND ADJACENT KUROSHIO DURING 1986 [J].
CHEN, CS ;
BEARDSLEY, RC ;
LIMEBURNER, R ;
KIM, K .
CONTINENTAL SHELF RESEARCH, 1994, 14 (7-8) :909-&