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Biological control of air-sea CO2 fluxes: effect of photosynthetic and calcifying marine organisms and ecosystems Gattuso, J.P.; Pichon, M.; Frankignoulle, M. (1995). Biological control of air-sea CO2 fluxes: effect of photosynthetic and calcifying marine organisms and ecosystems. Mar. Ecol. Prog. Ser. 129(1-3): 307-312. https://dx.doi.org/10.3354/meps129307 In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630; e-ISSN 1616-1599, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 261268 [ download pdf ]

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Trefwoorden

Air-water exchanges Biochemical phenomena > Calcification Chemical compounds > Carbon compounds > Atmospheric gases > Carbon dioxide Chemical reactions > Photochemical reactions > Photosynthesis Data > Hydrographic data > Salinity data Data > Temperature data Hydrometeors > Atmospheric precipitations Modelling Reefs > Biogenic deposits > Coral reefs Respiration Marien/Kust

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Auteurs		Top
Gattuso, J.P. Pichon, M. Frankignoulle, M.

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Abstract

A simple expression enables prediction of the effect of photosynthetic and calcifying systems on air-sea CO2 exchange at all spatial scales (from organism to ecosystem). Input data are: gross primary production (Pg), respiration (R), net calcification (G) and the ratio of CO2 released to CaCO3 precipitated ( psi ); the output is the amount of dissolved inorganic carbon (FCO2 which needs to be exchanged with the atmosphere to balance biologically mediated changes in the concentration of dissolved inorganic carbon in an open sea water system: FCO2 = -Pg + R + psi G. Coral reef data were used in the model to illustrate the relative influence of organic and inorganic carbon metabolism on ocean-atmosphere CO2 cycling. A coral reef comprised of calcareous and non-calcareous organisms can be shown to act as a sink for atmospheric CO2 when excess (= net) production is high and CaCO3 precipitation is low. These characteristics are not typical of actively developing reef systems which typically exhibit a nearly balanced organic carbon metabolism (Pg/R similar to 1) and relatively high rates of calcification. In these circumstances, reef communities can be expected to cause CO2 evasion to the atmosphere. This prediction is confirmed by the only existing measurement of air-sea CO2 flux in a coral reef system.

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