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| St John, M. A.; Barange, M.; Benway, H.; Flynn, K. J.; Holt, J.; Merino, G.; Martin, A.; Mitra, A.; Melle, W.; Sanders, R.; Trenkel, Verena M.; Grigorov, I.; Hoffman, E.. |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00243/35420/33946.pdf |
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| Jiao, N.; Robinson, C.; Azam, F.; Thomas, H.; Baltar, F.; Dang, H.; Hardman-mountford, N. J.; Johnson, M.; Kirchman, D. L.; Koch, B. P.; Legendre, L.; Li, C.; Liu, J.; Luo, T.; Luo, Y. -w.; Mitra, A.; Romanou, A.; Tang, K.; Wang, X.; Zhang, C.; Zhang, R.. |
| This paper reviews progress on understanding biological carbon sequestration in the ocean with special reference to the microbial formation and transformation of recalcitrant dissolved organic carbon (RDOC), the microbial carbon pump (MCP). We propose that RDOC is a concept with a wide continuum of recalcitrance. Most RDOC compounds maintain their levels of recalcitrance only in a specific environmental context (RDOCt). The ocean RDOC pool also contains compounds that may be inaccessible to microbes due to their extremely low concentration (RDOCc). This differentiation allows us to appreciate the linkage between microbial source and RDOC composition on a range of temporal and spatial scales. Analyses of biomarkers and isotopic records show intensive MCP... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00239/35040/33575.pdf |
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| Mitra, A.; Flynn, K. J.; Burkholder, J. M.; Berge, T.; Calbet, A.; Raven, J. A.; Graneli, E.; Glibert, P. M.; Hansen, P. J.; Stoecker, D. K.; Thingstad, F.; Tillmann, U.; Vage, S.; Wilken, S.; Zubkov, M. V.. |
| The traditional view of the planktonic food web describes consumption of inorganic nutrients by photoautotrophic phytoplankton, which in turn supports zooplankton and ultimately higher trophic levels. Pathways centred on bacteria provide mechanisms for nutrient recycling. This structure lies at the foundation of most models used to explore biogeochemical cycling, functioning of the biological pump, and the impact of climate change on these processes. We suggest an alternative new paradigm, which sees the bulk of the base of this food web supported by protist plankton communities that are mixotrophic - combining phototrophy and phagotrophy within a single cell. The photoautotrophic eukaryotic plankton and their heterotrophic microzooplankton grazers... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00189/30024/28509.pdf |
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