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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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| Leblanc, K.; Aristegui, J.; Armand, L.; Assmy, P.; Beker, B.; Bode, A.; Breton, E.; Cornet, V.; Gibson, J.; Gosselin, M. -p.; Kopczynska, E.; Marshall, H.; Peloquin, J.; Piontkovski, S.; Poulton, A. J.; Queguiner, B.; Schiebel, R.; Shipe, R.; Stefels, J.; Van Leeuwe, M. A.; Varela, M.; Widdicombe, C.; Yallop, M.. |
| Phytoplankton identification and abundance data are now commonly feeding plankton distribution databases worldwide. This study is a first attempt to compile the largest possible body of data available from different databases as well as from individual published or unpublished datasets regarding diatom distribution in the world ocean. The data obtained originate from time series studies as well as spatial studies. This effort is supported by the Marine Ecosystem Model Inter-Comparison Project (MAREMIP), which aims at building consistent datasets for the main plankton functional types (PFTs) in order to help validate biogeochemical ocean models by using carbon (C) biomass derived from abundance data. In this study we collected over 293 000 individual... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00373/48464/48718.pdf |
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| Schiebel, R.; Movellan, A.. |
| Planktic foraminifera are heterotrophic mesozooplankton of global marine abundance. The position of planktic foraminifers in the marine food web is different compared to other protozoans and ranges above the base of heterotrophic consumers. Being secondary producers with an omnivorous diet, which ranges from algae to small metazoans, planktic foraminifers are not limited to a single food source, and are assumed to occur at a balanced abundance displaying the overall marine biological productivity at a regional scale. With a new non-destructive protocol developed from the bicinchoninic acid (BCA) method and nano-photospectrometry, we have analysed the protein-biomass, along with test size and weight, of 754 individual planktic foraminifers from 21 different... |
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| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00249/36044/34586.pdf |
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