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Carbon isotopic fractionation by plankton in the Southern Indian Ocean: relationship between δ13 of particulate organic carbon and dissolved carbon dioxide
Bentaleb, I.; Fontugne, M.; Descolas-Gros, C.; Girardin, C.; Mariotti, A.; Pierre, C.; Brunet, C.; Poisson, A. (1998). Carbon isotopic fractionation by plankton in the Southern Indian Ocean: relationship between δ13 of particulate organic carbon and dissolved carbon dioxide, in: Le Fèvre, J. et al. (Ed.) Carbon Fluxes and Dynamic Processes in the Southern Ocean: Present and Past. Selected papers from the International JGOFS Symposium, Brest, France, 28-31 August 1995. Journal of Marine Systems, 17(1-4): pp. 39-58. hdl.handle.net/10.1016/S0924-7963(98)00028-1
In: Le Fèvre, J.; Tréguer, P. (Ed.) (1998). Carbon Fluxes and Dynamic Processes in the Southern Ocean: Present and Past. Selected papers from the International JGOFS Symposium, Brest, France, 28-31 August 1995. Journal of Marine Systems, 17(1-4). Elsevier: Amsterdam. 1-619 pp., more
In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963, more
Peer reviewed article  

Also published as
  • Bentaleb, I.; Fontugne, M.; Descolas-Gros, C.; Girardin, C.; Mariotti, A.; Pierre, C.; Brunet, C.; Poisson, A. (1998). Carbon isotopic fractionation by plankton in the Southern Indian Ocean: relationship between δ13 of particulate organic carbon and dissolved carbon dioxide. J. Mar. Syst. 17(1-4): 39-58. hdl.handle.net/10.1016/S0924-7963(98)00028-1, more

Available in Authors 

Keywords
    Carbon dioxide; Carbon isotopes; Heterotrophy; Phytoplankton; Plankton; Marine

Authors  Top 
  • Bentaleb, I.
  • Fontugne, M.
  • Descolas-Gros, C.
  • Girardin, C.
  • Mariotti, A.
  • Pierre, C.
  • Brunet, C., more
  • Poisson, A.

Abstract
    Simultaneous measurements of chlorophyll a, carboxylase activities (Rubisco and ßcarboxylases) in phytoplankton, organic carbon content and isotopic composition (dFull-size image (<1 K)(POC)) of suspended particulate organic matter, and partial pressure of carbon dioxide in surface seawater were performed during the end of summer 1992, in the South Indian Ocean. Results indicate that plankton populations display different carbon metabolisms on both sides of the subtropical convergence (STC). North of STC, planktonic communities appeared to be dominated by mixo/heterotrophs, while south of STC, physiological (ßC/R ratio) or biomass (C(POC)/Chl) parameters are characteristic of autotrophic phytoplankton. The isotopic fractionation (ep) between dissolved CO2 and SPOM is different for these two populations. Only dFull-size image (<1 K) values of flora dominated by diatoms south of the STC part showed a strong correlation with dissolved CO2 concentrations which permitted a relationship between these parameters for the Southern Ocean.

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