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| Movellan, A.; Schiebel, R.; Zubkov, M. V.; Smyth, A.; Howa, H.. |
| The ecological role of foraminifers has been largely unknown partly owing to difficulties in determining their individual biomass, although foraminifers are abundant in surface marine sediments. The present study provides a reliable and inexpensive method for the quantification of the protein content of hard-shelled foraminifers as a measure of biomass while preserving the tests for later analyses (e.g. morphometry, stable isotopes), using nano-spectrophotometry. The protein biomass, is significantly correlated with size, and shell weight of Ammonia tepida (n = 102, p < 0.00001, R-2 = 0.462, and n = 181, p < 0.00001, R-2 = 0.855). Variability in the relation between test size and weight, and cell biomass may result from natural variability in... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00287/39852/38391.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... |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00189/30024/28509.pdf |
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