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| Marchais, V.; Richard, J.; Jolivet, A.; Flye-sainte-marie, J.; Thebault, J.; Jean, F.; Richard, P; Paulet, Y. -m.; Clavier, J.; Chauvaud, L.. |
| This research investigated how the carbon isotopic composition of food source (delta C-13(food)) and dissolved inorganic carbon (delta C-13(DIC)) influences the carbon isotopic composition of Pecten maximus shells (delta C-13(shell)) under both experimental and natural conditions. The objectives are to better understand the relationship between P. maximus and its environment, and to specifically distinguish conditions under which calcification is influenced by respired CO2 derived from food sources versus conditions in which calcification uses inorganic carbon from seawater. Laboratory experiment investigated carbon incorporation into shell carbonates by maintaining scallops under conditions where the stable carbon isotopic composition of food sources was... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00284/39485/82772.pdf |
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| Lorrain, A.; Clavier, J.; Thebault, J.; Tremblay-boyer, L.; Houlbreque, F.; Amice, E.; Le Goff, M.; Chauvaud, L.. |
| Researchers often use metabolic measurements in the field over narrow time periods to estimate an organism's metabolism over large time scales. Here, we measured in situ respiration, calcification and excretion rates of the tropical gastropod Tectus niloticus L. through benthic chamber experiments. Our samples spanned a 21 h time frame and were taken during both the warm and cool seasons. We assessed diel and seasonal variability in metabolic rates, as well as the effect of individual size and the contribution of shell epi-and endobionts. Our results show that metabolic rates vary through time at both diel and seasonal scales, as measured fluxes for respiration and calcification were significantly higher at night during the warm season. This nocturnal... |
| Tipo: Text |
Palavras-chave: Gastropod; Seasonal variations; Diel variations; Size; Carbon fluxes; CO2; CaCO3; New Caledonia. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00256/36675/39633.pdf |
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