Publication Date:
2023-01-16
Description:
In this dataset, the branched glycerol dialkyl glycerol tetraethers (brGDGTs) data in a creek catchment located in southwest England are included, with 78 soil samples along 14 soil transects from hilltop to downslope, including 31 arable land sites, 14 permanent grassland sites, 24 temporary grassland (ley) sites and 5 woodland sites, 7 riverbed sediments at three locations along each of the two tributaries (upstream, midstream and downstream), and one more at the joint outlet, and a 50 cm long sediment core in the lake, which is about 150 m away from the joint outlet.
The soils or sediments were freeze dried and homogenized, and then they were extracted with dichloromethane (DCM):MeOH (9:1, v/v) with an accelerated solvent extractor to obtain the total lipid extracts (TLEs). After adding of a known amount of internal standard, the TLEs were dried under a nitrogen stream, and then separated into apolar and polar fractions by passing them over an activated aluminum oxide column (Al2O3). The polar fractions containing GDGTs were evaporated under a gentle nitrogen stream, and then the samples were re-dissolved in a hexane:isopropanol (99:1, v/v) and filtrated through a polytetrafluoroethylene (PTFE) filter for UHPLC analyzing.
Keywords:
Area/locality; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether, Ia, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ib, fractional abundance; Branched glycerol dialkyl glycerol tetraether, Ic, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIa, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIa', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIb, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIb', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIc, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIc', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIa, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIa', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIb, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIb', fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIc, fractional abundance; Branched glycerol dialkyl glycerol tetraether, IIIc', fractional abundance; Branched glycerol dialkyl glycerol tetraether, per unit mass total organic carbon; Calculated; Carbon, organic, total; Carminowe_Creek_catchment; Cornwall, United Kingdom; Crenarchaeol, fractional abundance; Crenarchaeol, per unit mass total organic carbon; Degree of cyclisation; Hexamethylated branched glycerol dialkyl glycerol tetraether IIIa/a'; Isomer ratio; Isoprenoid acyclic glycerol dialkyl glycerol tetraether, fractional abundance; Isoprenoid acyclic glycerol dialkyl glycerol tetraether, per unit mass total organic carbon; Isoprenoid acyclic glycerol dialkyl glycerol tetraether/Crenarchaeol ratio; LATITUDE; LONGITUDE; Methylation index of dominant branched tetraethers; Pentamethylated branched glycerol dialkyl glycerol tetraether IIa/a'; pH, soil; Sample ID; Sediment sample; see reference(s); SES; Sum branched glycerol dialkyl glycerol tetraether, per unit sediment mass; Tetramethylated branched glycerol dialkyl glycerol tetraether Ia; UHPLC; Ultra High Performance Liquid Chromatography
Type:
Dataset
Format:
text/tab-separated-values, 3417 data points
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