Altitudinal shifts in the branched tetraether lipid distribution in soil from Mt. Kilimanjaro (Tanzania):: Implications for the MBT/CBT continental palaeothermometer
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作者:
Damste, Jaap S. Sinninghe
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Univ Utrecht, Fac Geosci, NL-3508 TA Utrecht, Netherlands
NIOZ Royal Netherlands Inst Sea Res, Dept Marine Biogeochem & Toxicol, NL-1790 AB Den Burg, NetherlandsUniv Utrecht, Fac Geosci, NL-3508 TA Utrecht, Netherlands
Damste, Jaap S. Sinninghe
[1
,2
]
Ossebaar, Jort
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Univ Utrecht, Fac Geosci, NL-3508 TA Utrecht, NetherlandsUniv Utrecht, Fac Geosci, NL-3508 TA Utrecht, Netherlands
Ossebaar, Jort
[1
]
Schouten, Stefan
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NIOZ Royal Netherlands Inst Sea Res, Dept Marine Biogeochem & Toxicol, NL-1790 AB Den Burg, NetherlandsUniv Utrecht, Fac Geosci, NL-3508 TA Utrecht, Netherlands
Schouten, Stefan
[2
]
Verschuren, Dirk
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Univ Ghent, Dept Biol, Limnol Unit, B-9000 Ghent, BelgiumUniv Utrecht, Fac Geosci, NL-3508 TA Utrecht, Netherlands
Verschuren, Dirk
[3
]
机构:
[1] Univ Utrecht, Fac Geosci, NL-3508 TA Utrecht, Netherlands
[2] NIOZ Royal Netherlands Inst Sea Res, Dept Marine Biogeochem & Toxicol, NL-1790 AB Den Burg, Netherlands
[3] Univ Ghent, Dept Biol, Limnol Unit, B-9000 Ghent, Belgium
The distribution of branched glycerol dialkyl glycerol tetraether (GDGT) lipids in sixteen soil samples from an altitudinal transect on the southeastern slope of Mt. Kilimanjaro (Tanzania) was examined. The degree of methylation and cyclisation (expressed in the so-called MBT and CBT indices) of these GDGTs.. derived from unknown soil bacteria, was determined mainly by changes in mean annual air temperature (MAT). Application of the global soil correlation [Weijers, J.W.H., Schouten, S., van den Donker, J.C., Hopmans, E.C., Sinninghe Damste, J.S., 2007. Environmental controls on bacterial tetraether membrane lipid distribution in soils. Geochimica et Cosmochimica Acta 71, 703-713] resulted in reconstructed MATs slightly higher than reported in situ values. The findings support the application of the MBT/CBT continental palaeothermometer. (C) 2007 Elsevier Ltd. All rights reserved.