Liu, Xiao-Lei; Leider, Arne; Gillespie, Aimee; Gröger, Jens; Versteegh, Gerard J M; Hinrichs, Kai-Uwe (2010): Compositions of branched glycerol dialkyl glycerol tetraethers (GDGTs) in sediment samples from Bullenmoor peat bog, Northern Germany. PANGAEA, https://doi.org/10.1594/PANGAEA.754802, Supplement to: Liu, X-L et al. (2010): Identification of polar lipid precursors of the ubiquitous branched GDGT orphan lipids in a peat bog in Northern Germany. Organic Geochemistry, 41(7), 653-660, https://doi.org/10.1016/j.orggeochem.2010.04.004
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Two types of intact branched glycerol dialkyl glycerol tetraethers (GDGTs) were detected in peat bog samples from Bullenmoor, Northern Germany. Glucuronosyl and glucosyl branched GDGTs comprise on average ca. 4% of the microbial intact polar lipids in the anoxic, acidic peat layer ca. 20 cm below the surface of the bog, suggesting an important ecological role for the source microorganisms. No corresponding phospholipids were detected. Notably, glycosidic branched GDGTs are 5-10 times less abundant than their intact isoprenoid counterparts derived from Archaea, while branched GDGT core lipids exceed their isoprenoid analogues by about an order of magnitude. These contrasting relationships may reflect lower standing stocks of the biomass of producers of branched GDGTs, combined with higher population growth rates relative to soil Archaea. Search strategies for the microbial producers of these conspicuous orphan lipids should benefit from the discovery of their intact polar precursors.
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Datasets listed in this publication series
- Liu, X-L; Leider, A; Gillespie, A et al. (2010): (Figure 1) Redox potential and pH of sediment samples from Bullenmoor peat bog, Northern Germany. https://doi.org/10.1594/PANGAEA.754756
- Liu, X-L; Leider, A; Gillespie, A et al. (2010): (Figure 6) Concentrations of Glc-branched-GDGT, GlcA-branched-GDGT, 2Gly-isoprenoid-GDNT, PME-DAG, PE-DEG, sum of archaeal IPLs, sum of bacterial IPLs, sum of total IPLs, core lipids of branched and isoprenoidal GDGTs in Bullenmoor peat bog. https://doi.org/10.1594/PANGAEA.754752
- Liu, X-L; Leider, A; Gillespie, A et al. (2010): (Table 1) Methylation index (MBT) and cyclization ratio (CBT) of branched GDGTs, and mean annual air temperature (MAAT) and pH values from MBT and CBT indices of Bullenmoor peat bog, Northern Germany. https://doi.org/10.1594/PANGAEA.754801