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| Gazeau, F; Duarte, Cm; Gattuso, Jp; Barron, C; Navarro, N; Ruiz, S; Prairie, Yt; Calleja, M; Delille, B; Frankignoulle, M; Borges, Av. |
| Planktonic and benthic incubations (bare and Posidonia oceanica vegetated sediments) were performed at monthly intervals from March 2001 to October 2002 in a seagrass vegetated area of the Bay of Palma (Mallorca, Spain). Results showed a contrast between the planktonic compartment, which was on average near metabolic balance (-4.6 +/- 5.9 mmol O-2 m(-2) d(-1)) and the benthic compartment, which was autotrophic (17.6 +/- 8.5 mmol O-2 m(-2) d(-1)). During two cruises in March and June 2002, planktonic and benthic incubations were performed at several stations in the bay to estimate the whole-system metabolism and to examine its relationship with partial pressure of CO2 (pCO(2)) and apparent oxygen utilisation (AOU) spatial patterns. Moreover, during the... |
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| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00247/35853/34374.pdf |
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| Juilletleclerc, A; Montaggioni, Lf; Pichon, M; Gattuso, Jp. |
| Oxygen isotope ratios were measured along the growth axis of branches of the scleractinian coral Acropora formosa collected at 2 and 12 metre depths at Yonge reef (Northern Great Barrier Reef, Australia). Measurements were made between two reference points separated by a distance corresponding to a growth period of six months, from mid-winter to mid-summer. For each of the two reference points, information concerning the environmental parameters controlling the development of the coral colonies was collected in situ. The variability of the isotopic values recorded from coral skeletons grown in identical physical and chemical conditions cannot be ascribed to technical problems, but may rather be induced by calcification mechanisms. In order to define the... |
| Tipo: Text |
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| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20423/18090.pdf |
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| Migne, A; Davoult, Dominique; Gattuso, Jp. |
| The production of calcium carbonate by a dense Ophiothrix fragilis population was calculated in order to investigate its role in the carbon budget of a temperate coastal ecosystem (Dover Strait, eastern English Channel). Production, calculated using monthly data of population density, demographic structure and a size/CaCO3 conversion, was 682 g CaCO3 m(-2) yr(-1). Assuming that the molar ratio of CO2 released to CaCO3 precipitated varied with temperature between 0.66 and 0.73, this production would result in the release of 4.8 mol CO2 m(-2) yr(-1). This calculation reinforces the suggestion that this coastal system is a source of CO2 to the atmosphere. |
| Tipo: Text |
Palavras-chave: CO2 flux; CaCO3 production; Ophiuroid; Coastal ecosystem; Temperate sea. |
| Ano: 1998 |
URL: https://archimer.ifremer.fr/doc/00248/35947/34474.pdf |
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