Dugerdil, Lucas; Ménot, Guillemette; Peyron, Odile; Egamberdieva, Dilfuza; Jouffroy-Bapicot, Isabelle; Vannière, Boris; Alimov, Jakhongir; Luneau, Elise; Lhuillier, Johanna; Joannin, Sébastien (2025): Isoprenoid Glycerol Dialkyl Glycerol Tetraethers (isoGDGTs) from Lake Fazilman, Uzbekistan [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987390 (DOI registration in progress), In: Dugerdil, L et al. (2025): Holocene multi-proxy analyses from Lake Fazilman, Uzbekistan: pollen, NPPs, GDGTs, XRF, magnetic susceptibility, climate and vegetation quantitative reconstructions [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.987394 (DOI registration in progress)
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Published: 2025-12-09
Abstract:
This data table contains the concentration of the major isoprenoid Glycerol Dialkyl Glycerol Tetraethers (isoGDGTs) of a 227 cm-long core core from Lake Fazilman (Fazilman kul, 40.550406 N, 66.589361 E; 1637 m a.s.l.), collected in July 2021 with a 50 cm Russian corer. Mainly, each sample of one cm³ of sediment, after a 24 hours lyophilization and weighing, was crushed. The total lipid content (TLC) was twice extracted from the sediment with a DCM:MeOH (3:1) solvent extraction catalysed by microwave at 70 °C and under pressure. Then, to separate GDGTs from other lipids, the TLC was filtered on SPE cartridges and concentrated in vials. External C46 GDGTs were added as internal standard in order to estimate the Fazilman GDGTs absolute concentration (Huguet et al., 2006). GDGTs were injected in hexane:iso-propanol (99.8:0.2) solvent for a high performance liquid chromatography mass spectrometry (HPLC-APCI-MS, Agilent 1200) analysis in LGLTPE-ENS de Lyon laboratory. Then each compound was manually integrated using the m/z ratio and relative abundances in order to identify isoGDGTs (Liu et al., 2012). The external standard (C46) and the concentration of the different isoGDGTs is given in nanogrammes per one gramme of sediment. The sample depth is given in centimeters and the age in year calibrated BP (age-depth model performed with BACON and the IntCal20 calibration curve based on 15 radiocarbon dating; Blaauw et al., 2011; Reimer et al., 2020).
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Blaauw, Maarten; Christen, Andrés (2011): Flexible paleoclimate age-depth models using an autoregressive gamma process. Bayesian Analysis, 6(3), 457-474, https://doi.org/10.1214/11-BA618
De Jonge, Cindy; Hopmans, Ellen C; Zell, Claudia; Kim, Jung-Hyun; Schouten, Stefan; Sinninghe Damsté, Jaap S (2014): Occurrence and abundance of 6-methyl branched glycerol dialkyl glycerol tetraethers in soils: Implications for palaeoclimate reconstruction. Geochimica et Cosmochimica Acta, 141, 97-112, https://doi.org/10.1016/j.gca.2014.06.013
Ding, Su; Schwab, Valérie F; Ueberschaar, Nico; Roth, Vanessa-Nina; Lange, Markus; Xu, Yunping; Gleixner, Gerd; Pohnert, Georg (2016): Identification of novel 7-methyl and cyclopentanyl branched glycerol dialkyl glycerol tetraethers in lake sediments. Organic Geochemistry, 102, 52-58, https://doi.org/10.1016/j.orggeochem.2016.09.009
Dugerdil, Lucas; Peyron, Odile; Ménot, Guillemette; Egamberdieva, Dilfuza; Alimov, Jakhongir; Leroy, Suzanne A G; Garnier, Eric; Nowak, Arkadiusz; Joannin, Sébastien (2025): First paleoenvironmental calibrations for modern pollen rain of Tajikistan and Uzbekistan: A case study of pollen - vegetation functional biogeography of Arid Central Asia. Global and Planetary Change, 252, 104857, https://doi.org/10.1016/j.gloplacha.2025.104857
Dugerdil, Lucas; Peyron, Odile; Violle, Cyrille; Joannin, Sébastien; Ménot, Guillemette; Denelle, Pierre; Bruelheide, Helge; Chytrý, Milan; Field, Richard; Hatim, Mohamed Z; Gholizadeh, Hamid; Dolezal, Jiri; Pillar, Valério D; Shaltout, Kamal H; Schrodt, Franziska; Garnier, Eric (2025): Functional Signatures of Surface Pollen and Vegetation Are Broadly Similar: Good News for Past Reconstructions of Vegetation. Journal of Biogeography, 52(5), e15100, https://doi.org/10.1111/jbi.15100
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Funding:
Coverage:
Latitude: 40.550406 * Longitude: 66.589361
Date/Time Start: 2021-07-01T00:00:00 * Date/Time End: 2021-07-01T00:00:00
Minimum DEPTH, sediment/rock: 0.09 m * Maximum DEPTH, sediment/rock: 2.27 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Dugerdil, Lucas | |||
| 2 | DEPTH, sediment/rock | Depth sed | m | Dugerdil, Lucas | Geocode | |
| 3 | Calendar age | Cal age | ka BP | Dugerdil, Lucas | Age, 14C calibrated, Bacon and IntCal20 | according to Blaauw et al., 2011; Reimer et al., 2020 |
| 4 | C46 standard, per unit sediment mass | C46/sed | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 5 | Isoprenoid acyclic glycerol dialkyl glycerol tetraether | iso GDGT-0 | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 6 | Isoprenoid monocyclic glycerol dialkyl glycerol tetraether | iso GDGT-1 | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 7 | Isoprenoid dicyclic glycerol dialkyl glycerol tetraether | iso GDGT-2 | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 8 | Isoprenoid tricyclic glycerol dialkyl glycerol tetraether | iso GDGT-3 | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 9 | Isoprenoid tetracyclic glycerol dialkyl glycerol tetraether | iso GDGT-4 | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 10 | Crenarchaeol, per unit sediment mass | Cren/sed | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) | |
| 11 | Crenarchaeol regio-isomer, per unit sediment mass | Cren'/sed | ng/g | Dugerdil, Lucas | High Performance Liquid Chromatography (HPLC-APCI-MS) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
580 data points