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| Winter, Amos; Henderiks, Jorijntje; Beaufort, Luc; Rickaby, Rosalind E. M.; Brown, Christopher W.. |
| Coccolithophores are one of the most abundant eukaryotic phytoplankton in the oceans and are distinguished by their ability to build calcitic platelets (coccoliths). Of the numerous species, Emiliania huxleyi is considered one of the major calcifiers in the pelagic ocean. There is growing concern that increasing levels of CO2 in the atmosphere and the subsequent acidification of the ocean may disrupt the production of coccoliths. Furthermore, any change in the global distribution and abundance of E. huxleyi relative to non-calcifying groups of phytoplankton (e. g. diatoms) will have important effects on the biogeochemical cycling of carbon and climatic feedbacks. We review different lines of evidence that suggest E. huxleyi is increasingly expanding its... |
| Tipo: Text |
Palavras-chave: Coccolithophores; Biogeography; Poles; Geochemical cycling. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00292/40350/38929.pdf |
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| Halloran, Paul R.; Rust, Nigel; Rickaby, Rosalind E. M.. |
| Trace element analysis of open-marine sedimentary carbonates provides a wealth of paleoclimate data. At present, the majority of this data is obtained from foraminifera tests. Complications regarding the variability of conditions experienced by foraminifera throughout test formation and the influence of diagenetic processes on sample chemistry limit the value of foraminifera samples in certain situations. Coccoliths, the calcium carbonate plates produced by coccolithophores, represent a second major pelagic open-marine carbonate source with the potential to provide a wide range of valuable trace element proxy data but which have, until now, been unavailable for analysis of many trace elements because of clay contamination. Here we describe a novel... |
| Tipo: Text |
Palavras-chave: Coccolith; Coccolithophore; Clay; Sorting; Trace element; Geochemistry. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00220/33080/31542.pdf |
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