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The role of zooplankton communities in carbon recycling in the Ocean: the case of the Southern Ocean ArchiMer
Mayzaud, Patrick; Pakhomov, Evgeny A..
Basin-scale carbon recycling estimates were obtained by combining high-resolution data on zooplankton taxonomic and functional composition with species-specific respiration rates. Datasets were collected in the Atlantic and Indian sectors of the Southern Ocean during four cruises covering spring, mid-summer, autumn and late winter between 1993 and 1998. Carbon recycling by Antarctic meso-and macrozooplankton represented a significant (44-62%) fraction of the primary production, which is at the higher end of previous estimates. Assessment based on detailed community structure appeared to be more realistic than previous estimates and showed that carbon dioxide recycling at the global scale is not a mere function of temperature and abundance of zooplankton....
Tipo: Text Palavras-chave: Zooplankton community; Carbon recycling; Southern Ocean.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00289/40060/38758.pdf
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Lipid composition of the Antarctic fish Pleuragramma antarcticum. Influence of age class ArchiMer
Mayzaud, Patrick; Chevallier, J.; Tavernier, E.; Moteki, M.; Koubbi, Philippe.
Larvae and juvenile stages of Pleuragramma antarcticum have been collected in the Dumont D'Urville Sea (East Antarctica) during summer 2008 on board the TRV Umitaka Maru during the CEAMARC survey. Detailed analyses of their lipid class and fatty acid compositions were carried out. P. antarcticum showed a pronounced ontogenic lipid accumulation with increasing size. Larvae displayed a dominance of polar lipids (83% of total lipids) and low percentage of triglycerides (7%). Conversely juveniles showed an increasing accumulation of triglycerides (up to 72.4%). The fatty acid composition of polar lipids remained rather stable between stages with 22:6n-3 and 20:5n-3 as dominant contributors. The relatively minor ontogenic changes, e. g. increase of...
Tipo: Text Palavras-chave: Pleuragramma antarcticum; Age class; Lipid composition; Fatty acid trophic markers.
Ano: 2011 URL: https://archimer.ifremer.fr/doc/00230/34127/32607.pdf
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