Abstract
IP25 is a highly branched isoprenoid and an organic geochemical biomarker that is produced by some Arctic sea ice diatoms. IP25 has previously been used in Arctic palaeo sea ice reconstruction studies and as a tracer for studying Arctic food webs. Here, the molecular structure of IP25 has been confirmed by 1H and 13C NMR spectroscopy following large-scale extraction from marine sediments obtained from the Canadian Arctic and purification using a combination of open-column and HPLC chromatographic methods. The structure of IP25 was consistent between the three different sampling locations and was identical to that found previously for this biomarker following synthesis from a closely related highly branched isoprenoid diene. Since this study represents the first structural characterisation of IP25 in sediments, future analysis of sedimentary IP25 for palaeo Arctic sea ice reconstructions can be carried out with much greater confidence.
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References
Andrews JT, Belt ST, Olafsdottir S, Massé G, Vare LL (2009) Sea ice and marine climate variability for NW Iceland/Denmark Strait over the last 2,000 cal. year BP. Holocene 19:775–784
Belt ST, Cooke DA, Robert J-M, Rowland SJ (1996) Structural characterisation of widespread polyunsaturated isoprenoid biomarkers: a C25 triene, tetraene and pentaene from the diatom Haslea ostrearia Simonsen. Tetrahedron Lett 37:4755–4758
Belt ST, Allard WG, Massé G, Robert J-M, Rowland SJ (2000) Highly branched isoprenoids (HBIs): identification of the most common and abundant sedimentary isomers. Geochim Cosmochim Acta 64:3839–3851
Belt ST, Massé G, Rowland SJ, Poulin M, Michel C, Leblanc B (2007) A novel chemical fossil of palaeo sea ice: IP25. Org Geochem 38:16–27
Belt ST, Massé G, Vare LL, Rowland SJ, Poulin M, Sicre M-A, Sampei M, Fortier L (2008) Distinctive 13C isotopic signature distinguishes a novel sea ice biomarker in Arctic sediments and sediment traps. Mar Chem 112:158–167
Belt ST, Vare LL, Massé G, Manners H, Price J, MacLachlan S, Andrews JT, Schmidt S (2010) Striking similarities in temporal changes to seasonal sea ice conditions across the central Canadian Arctic Archipelago during the last 7,000 years. Quat Sci Rev 29:3489–3504
Brown T, Belt S (2012) Identification of the sea ice diatom biomarker IP25 in Arctic benthic macrofauna: direct evidence for a sea ice diatom diet in Arctic heterotrophs. Polar Biol 35:131–137
Brown T, Belt ST, Philippe B, Mundy CJ, Massé G, Poulin M, Gosselin M (2011) Temporal and vertical variations of lipid biomarkers during a bottom ice diatom bloom in the Canadian Beaufort Sea: further evidence for the use of the IP25 biomarker as a proxy for spring Arctic Sea ice. Polar Biol 34:1857–1868
Grossi V, Beker B, Geenevasen JAJ, Schouten S, Raphel D, Fontaine M-F, Sinninghe-Damsté JS (2004) C25 highly branched isoprenoid alkenes from the marine benthic diatom Pleurosigma strigosum. Phytochemistry 65:3049–3055
Massé G, Rowland SJ, Sicre M-A, Jacob J, Jansen E, Belt ST (2008) Abrupt climate changes for Iceland during the last millennium: evidence from high resolution sea ice reconstructions. Earth Planet Sci Lett 269:565–569
Müller J, Massé G, Stein R, Belt ST (2009) Variability of sea-ice conditions in the Fram strait over the past 30,000 years. Nat Geosci 2:772–776
Müller J, Wagner A, Fahl K, Stein R, Prange M, Lohmann G (2011) Towards quantitative sea ice reconstructions in the northern north Atlantic: a combined biomarker and numerical modelling approach. Earth Planet Sci Lett 306:137–148
Sinninghe-Damsté JS, Schouten S, Rijpstra WIC, Hopmans EC, Peletier H, Gieskes WWC, Geenevasen JAJ (1999) Structural identification of the C25 highly branched isoprenoid pentaene in the marine diatom Rhizosolenia setigera. Org Geochem 30:1581–1583
Sinninghe-Damté JS, Muyzer G, Abbas B, Rampen SW, Massé G, Allard WG, Belt ST, Robert J-M, Rowland SJ, Moldowan JM, Barbanti SM, Fago FJ, Denisevich P, Dahl J, Trindade LAF, Schouten S (2004) The rise of the rhizosolenoid diatoms. Science 304:584–587
Vare LL, Massé G, Gregory TR, Smart CW, Belt ST (2009) Sea ice variations in the central Canadian Arctic Archipelago during the Holocene. Quat Sci Rev 28:1354–1366
Vare LL, Massé G, Belt ST (2010) A biomarker-based reconstruction of sea ice conditions for the Barents Sea in recent centuries. Holocene 20:637–643
Volkman JK, Barrett SM, Dunstan GA (1994) C25 and C30 highly branched isoprenoid alkenes in laboratory cultures of two marine diatoms. Org Geochem 21:407–414
Acknowledgments
This work was supported by the Natural Environmental Research Council (NERC), UK (NE/D013216/1), and is also a contribution to the CASE Initial Training Network funded by the European Community’s 7th Framework Programme FP7 2007/2013, Marie-Curie Actions, under Grant Agreement No. 238111. We are grateful to the officers and crew of the CCGS Amundsen and to André Rochon (ISMER-UQUR) and co-workers for their invaluable support in obtaining sediments during the ArcticNet (2005) cruise.
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Belt, S.T., Brown, T.A., Sanz, P.C. et al. Structural confirmation of the sea ice biomarker IP25 found in Arctic marine sediments. Environ Chem Lett 10, 189–192 (2012). https://doi.org/10.1007/s10311-011-0344-0
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DOI: https://doi.org/10.1007/s10311-011-0344-0