Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"GDGTs"”.
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Molecular studies of the sources and significance of archaeal lipids in the oceans
… for paleoenvironmental proxies reliant upon GDGTs. To investigate the effects of organic matter and bicarbonate + ammonia amendments on archaeal tetraether lipids and microbial community composition, I conducted large scale microcosm experiments. Experimental conditions did not promote the …
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The Reconstruction of Climate in Beringia by analysis of Glycerol Dialkyl Glycerol Tetraether (GDGT) Distributions using High Performance Liquid Chromatography – Mass Spectrometry (HPLC-MS).
… assessed and reconstructed using isoprenoid GDGTs (isoGDGTs), finding that GDGT distributions were characteristic of the open marine environment in most cases. Temperatures were found to be lowest on the transition from marine isotope stage (MIS) 6 to 5, while they peaked as MIS 5 closed. …
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Hydrogen isotope fractionation in ammonia-oxidizing archaea
In recent years, the potential of the hydrogen stable isotope composition (δ2H) signature of isoprenoid glycerol dibiphytanyl glycerol tetraether (GDGT) membrane lipids of ammonia-oxidizing archaea (class Nitrososphaeria) as a novel palaeohydrological proxy has gained increasing attention. This PhD …
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A 210,000-year reconstruction of subtropical climates from Fern Gully Lagoon, North Stradbroke Island (Minjerribah), Australia
Climates during past interglacials may be an analogue for future climate change. Robust reconstructions of past interglacial climates are important for providing these analogues, as well as for better understanding ecosystem responses that are likely to accompany an increase in global temperatures. …