Data/hora: 11/06/2024 10:15:47

Provedor de dados: | 5
País: | France
Título: | Oxygen and carbon dioxide fluxes at the water-sediment interface of a tropical lagoon
Autores: | Boucher, Guy; Clavier, Jacques; Garrigue, Claire.
Data: | 1994-04-21
Ano: | 1994
Palavras-chave: | Carbon flux; Metabolism; Tropical lagoon.
Resumo: | Oxygen demand, carbon dioxide release and total alkalinity shift were calculated from changes in oxygen, pH and total alkalinity produced by bottom dark incubations at the water-sediment interface of the 3 bottom types identified in a southwest lagoon in New Caledonia. Total sediment oxygen demand (AO?) was corrected from nonbioloyical oxygen demand (NBOD) In order to obtain the apparent biological activity (AOlO)T.o tal carbon dioxide flux (AC02)w as corrected from total alkalinity shift in order to estimate organic carbon processes. The resulting mean carbon dioxide flux (ACOzO= 2.58 mm01 m-' h-', SE = 0.12) exceeded biological oxygen demand (AO," = 1.60 mm01 m-' h-', SE = 0.08). The highly significant ratio estimates from functional regression lines of ACO," on A 0 2 and ACOzo on AOzO gave a total community respiratory quotient (CRQ) of 1.17 (SE = 0.06) and an organic respiratory quotient (CRQO)i,n volving only direct biological processes, of 1.42 (SE = 0.07) for the lagoon. The significance and the use of these ratios are discussed in order to calculate the anaerobic metabolism proportion (40.3 % of total metabolism for an aerobic respiratory quotient of 0.85). Thus, the simultaneous measurement in the field of O2 fluxes and CO2 fluxes, corrected from appropriate alkalinity changes, allows a rapid approach for estimating carbon production at the water-sediment interface of undisturbed communities.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00296/40745/39738.pdf

DOI:10.3354/meps107185

https://archimer.ifremer.fr/doc/00296/40745/

Editor: | Inter-research
Formato: | application/pdf
Fonte: | Marine Ecology Progress Series (0171-8630) (Inter-research), 1994-04-21 , Vol. 107 , N. 1-2 , P. 185-193

Fonte:

Inter-Research 1994

info:eu-repo/semantics/openAccess

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