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Hydroxylated isoprenoidal GDGTs in the Nordic Seas

Hydroxylated isoprenoidal GDGTs in the Nordic Seas
Hydroxylated isoprenoidal GDGTs in the Nordic Seas
Archaea modify their membrane lipid composition to maintain integrity and exchange capabilities across a wide temperature range. The number of rings in the tetraether structure increases with higher ambient temperatures. Recently, novel glycerol dialkyl glycerol tetraethers (GDGTs) with an additional hydroxyl group on the alkyl chain were described (OH-GDGTs). Here we show that at a regional scale in the Nordic Seas (western Barents, Norwegian, Greenland, and Iceland Seas), the OH-GDGTs' contribution to the total archaeal GDGT pool as well as the ratio of specific OH-GDGTs versus crenarchaeol are higher in colder waters, especially in polar water masses. We also observe a shift in the number of rings of the OH-GDGTs with temperature. Thus, both the contribution of the OH-GDGTs to the total isoprenoidal GDGT pool and the number of rings in OH-GDGTs could be used as potential indicators of polar waters and might complement the currently used paleo sea surface temperature proxies in polar regions.
Arctic, Biomarkers, Crenarchaeota, Fram Strait, Isoprenoidal GDGT, OH-GDGT, Polar waters, TEX86, Sea surface temperature, Thaumarchaeota
0304-4203
1-10
Fietz, Susanne
2b1d9eec-bcb9-46a3-bcc5-7e64f2b882a8
Huguet, Carme
c3612ad8-576c-44bc-a942-d451b6cfd670
Rueda, Gemma
72317a5c-857f-4600-9319-90664dae2d20
Hambach, Bastian
d144b919-bc71-4793-89ee-7fdfdb7762bb
Rosell-Melé, Antoni
55d4a108-fcbe-4aad-80b5-66e30e047253
Fietz, Susanne
2b1d9eec-bcb9-46a3-bcc5-7e64f2b882a8
Huguet, Carme
c3612ad8-576c-44bc-a942-d451b6cfd670
Rueda, Gemma
72317a5c-857f-4600-9319-90664dae2d20
Hambach, Bastian
d144b919-bc71-4793-89ee-7fdfdb7762bb
Rosell-Melé, Antoni
55d4a108-fcbe-4aad-80b5-66e30e047253

Fietz, Susanne, Huguet, Carme, Rueda, Gemma, Hambach, Bastian and Rosell-Melé, Antoni (2013) Hydroxylated isoprenoidal GDGTs in the Nordic Seas. Marine Chemistry, 152, 1-10. (doi:10.1016/j.marchem.2013.02.007).

Record type: Article

Abstract

Archaea modify their membrane lipid composition to maintain integrity and exchange capabilities across a wide temperature range. The number of rings in the tetraether structure increases with higher ambient temperatures. Recently, novel glycerol dialkyl glycerol tetraethers (GDGTs) with an additional hydroxyl group on the alkyl chain were described (OH-GDGTs). Here we show that at a regional scale in the Nordic Seas (western Barents, Norwegian, Greenland, and Iceland Seas), the OH-GDGTs' contribution to the total archaeal GDGT pool as well as the ratio of specific OH-GDGTs versus crenarchaeol are higher in colder waters, especially in polar water masses. We also observe a shift in the number of rings of the OH-GDGTs with temperature. Thus, both the contribution of the OH-GDGTs to the total isoprenoidal GDGT pool and the number of rings in OH-GDGTs could be used as potential indicators of polar waters and might complement the currently used paleo sea surface temperature proxies in polar regions.

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More information

Published date: 20 May 2013
Keywords: Arctic, Biomarkers, Crenarchaeota, Fram Strait, Isoprenoidal GDGT, OH-GDGT, Polar waters, TEX86, Sea surface temperature, Thaumarchaeota
Organisations: Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 373722
URI: http://eprints.soton.ac.uk/id/eprint/373722
ISSN: 0304-4203
PURE UUID: 92371476-5796-4500-95c3-d57534ec0d27
ORCID for Bastian Hambach: ORCID iD orcid.org/0000-0003-4546-5672

Catalogue record

Date deposited: 04 Feb 2015 11:18
Last modified: 15 Mar 2024 03:51

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Contributors

Author: Susanne Fietz
Author: Carme Huguet
Author: Gemma Rueda
Author: Bastian Hambach ORCID iD
Author: Antoni Rosell-Melé

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