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Provenance of Tetraether Membrane Lipids in a Large Temperate Lake (Loch Lomond, Uk): Implications for Gdgt-based Palaeothermometry : Volume 11, Issue 3 (17/03/2014)

By Buckles, L. K.

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Book Id: WPLBN0004004907
Format Type: PDF Article :
File Size: Pages 64
Reproduction Date: 2015

Title: Provenance of Tetraether Membrane Lipids in a Large Temperate Lake (Loch Lomond, Uk): Implications for Gdgt-based Palaeothermometry : Volume 11, Issue 3 (17/03/2014)  
Author: Buckles, L. K.
Volume: Vol. 11, Issue 3
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Waldron, S., H. Weijer, J. W., Tran, X., Sinninghe Damsté, J. S., & Buckles, L. K. (2014). Provenance of Tetraether Membrane Lipids in a Large Temperate Lake (Loch Lomond, Uk): Implications for Gdgt-based Palaeothermometry : Volume 11, Issue 3 (17/03/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Earth Sciences, Utrecht University, Utrecht, the Netherlands. The application of glycerol dialkyl glycerol tetraether (GDGT)-based palaeoenvironmental proxies, such as the BIT index, TEX86 and the MBT/CBT palaeothermometer, has lately been expanded to lacustrine sediments. Given recent research identifying the production of branched, bacterial GDGTs (brGDGTs) within lakes, it is necessary to ascertain the effect of this lacustrine production on GDGT-based proxies. This study profiles a temperate, monomictic lake (Loch Lomond, UK), analysing labile intact polar GDGT lipids (IPLs) and resilient core GDGT lipids (CLs) in catchment soils, small tributary rivers, lake water and lake sediments.

Loch Lomond consists of two basins bisected by the Highland Boundary Fault, resulting in a mesotrophic to oligotrophic gradient from south to north. The north basin is fjord-like, while the south basin is shallow with a lowland catchment. Besides abundant influxes of allochthonous soil and peat-derived (CL) brGDGTs, brGDGTs are produced in a variety of settings in Loch Lomond. Rather than integrating a scattered soil signal, there is some evidence that small rivers may contribute to the brGDGT pool through addition of brGDGTs produced in situ in these streams. 300 days of settling particles and water column profiles of suspended particulate matter (SPM; March and September 2011) reveal brGDGT production throughout the water column, with (IPL and CL) brGDGT distributions varying by basin. In lake sediments, in situ brGDGT production affects the distributions of sedimentary brGDGTs despite high soil and peat-derived organic matter influxes from the catchment.

MBT/CBT-derived mean annual air temperature (MAAT) estimates from soil, river and lake sediments vary widely. A strong bias towards higher MAATs in the south and lower MAATs in the north basin further complicates the application of the proxy. These results emphasise that caution must be exercised when applying the MBT/CBT palaeothermometer to individual lakes in which the use of the proxy has not been validated and therefore the factors affecting its application are not well understood. Despite elevated BIT indices, (partly) due to in situ brGDGT production, reliable TEX86 lake surface temperature (LST) estimates were obtained from SPM with BIT indices up to 0.9 but containing abundant crenarchaeol. Lower north basin sediments yielded accurate LST estimates but require further evaluation to properly constrain the application of the TEX86 proxy.


Summary
Provenance of tetraether membrane lipids in a large temperate lake (Loch Lomond, UK): implications for GDGT-based palaeothermometry

Excerpt
Bauersachs, T., Speelman, E. N., Hopmans, E. C., Reichart, G., Schouten, S., and Sinninghe Damsté, J. S.: Fossilized glycolipids reveal past oceanic N2 fixation by heterocystous cyanobacteria. P. Natl. Acad. Sci. USA, 107, 19190–19194, 2010.; Bayfield, N. G. and Conroy J. W. H. (Eds.): Ecological Assessment of Loch Lomond Water Management Proposals, Report to Central Scotland Water Development Board by Centre for Ecology and Hydrology (NERC), available at: http://www.ceh.ac.uk/staffarchive/cr/t02050/x1/o148817cr.pdf (last access: 23 December 2013), 1995.; Bechtel, A., Smittenberg, R. H., Bernasconi, S. M., and Schubert, C. J.: Distribution of branched and isoprenoid tetraether lipids in an oligotrophic and a eutrophic Swiss lake: insights into sources and GDGT-based proxies, Org. Geochem., 41, 822–832, 2010.; Best, G. A. and Traill, I.: The physico-chemical limnology of Loch Lomond, Hydrobiologia, 290, 29–37, 1994.; Birse, E. L.: The assessment of climatic conditions, in: Scotland, 3. Bio-climatic Sub-regions, The Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen, 1971.; Blaga, C. I., Reichart, G. J., Heiri, O., and Sinninghe Damsté, J. S.: Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north-south transect, J. Paleolimnol., 41, 523–540, 2009.; Blaga, C. I., Reichart, G., Schouten, S., Lotter, A. F., Werne, J. P., Kosten, S., Mazzeo, N., Lacerot, G., and Sinninghe Damsté, J. S.: Branched glycerol dialkyl glycerol tetraethers in lake sediments: can they be used as temperature and pH proxies?, Org. Geochem., 41, 1225–1234, 2010.; Blaga, C. I., Reichart, G., Vissers, E. W., Lotter, A. F., Anselmetti, F. S., and Sinninghe Damsté, J. S.: Seasonal changes in glycerol dialkyl glycerol tetraether concentrations and fluxes in a perialpine lake: implications for the use of the TEX86 and BIT proxies, Geochim. Cosmochim. Ac., 75, 6416–6428, 2011.; Buckles, L. K., Villanueva, L., Weijers, J. W. H., Verschuren, D., and Sinninghe Damsté, J. S.: Linking isoprenoidal GDGT membrane-lipid distributions with gene abundances of ammonia-oxidising Thaumarchaeota and uncultured crenarchaeotal groups in the water column of a tropical lake (Lake Challa, East Africa), Environ. Microbiol., 15, 2445–2462, doi:10.1111/1462-2920.12118, 2013.; Buckles, L. K., Weijers, J. W. H., Verschuren, D., and Sinninghe Damsté, J. S.: Sources of core and intact branched tetraether membrane lipids in the lacustrine environment: anatomy of Lake Challa and its catchment, East Africa, Geochim. Cosmochim, Ac., submitted, 2014.; Conte, M. H., Thompson, A., Lesley, D., and Harris, R. P.: Genetic and physiological influences on the alkenone/alkenoate versus growth temperature relationship in emiliania huxleyi and Gephyrocapsa Oceanica, Geochim. Cosmochim. Ac., 62, 51–68, 1998.; Curran, J. C. and Poodle, T.: Aspects of the hydrology and hydrography of Loch Lomond, Hydrobiologia, 290, 21–28, 1994.; Das, S. K., Bendle, J., and Routh, J.: Evaluating branched tetraether lipid-based palaeotemperature proxies in an urban, hyper-eutrophic polluted lake in South Africa, Org. Geochem., 53, 45–51, 2012.; Edinger, J. E., Duttweiler, D. W., and Geyer, J. C.: The response of water temperatures to meteorological conditions, Water Resour. Res., 4, 1137–1143, 1968.; Eurolakes consortium: Integrated Water Resource Management for Important Deep European Lakes and their Catchment Areas: Site Characterisation, EC Framework Programme, 5, Deliverable D5, available at: http://www.hydromod.de/Eurolakes/ (last access: 07 March 2011), 2001.; Gibson, R. A., van der Meer, M. T. J., Hopmans, E. C., Reysenbach, A., Schouten, S., and Sinninghe Damsté, J. S.: Compariso

 

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