作者
B D A. NAAFS, G N INGLIS, Y ZHENG, M J AMESBURY, H BIESTER, R BINDLER, J BLEWETT, M A BURROWS, D DEL CASTILLO TORRES, F M CHAMBERS, A D COHEN, R P EVERSHED, S J FEAKINS, M GALKA, A GALLEGO-SALA, L GANDOIS, D M GRAY, P G HATCHER, E N HONORIO CORONADO, P D M HUGHES, A HUGUET, M KÖNÖNEN, F LAGGOUN-DEFARGE, O LÄHTEENOJA, M LAMENTOWICZ, R MARCHANT, E MCCLYMONT, X PONTEVEDRA- POMBAL, C PONTON, A POURMAND, A M RIZZUTI, L ROCHEFORT, J SCHELLEKENS, F DE VLEESCHOUWER, R D PANCOST
发表日期
2017
期刊
Geochimica et Cosmochimica Acta
卷号
208
页码范围
285-301
简介
Glycerol dialkyl glycerol tetraethers (GDGTs) are membrane-spanning lipids from Bacteria and Archaea that are ubiquitous in a range of natural archives and especially abundant in peat. Previous work demonstrated that the distribution of bacterial branched GDGTs (brGDGTs) in mineral soils is correlated to environmental factors such as mean annual air temperature (MAAT) and soil pH. However, the influence of these parameters on brGDGT distributions in peat is largely unknown. Here we investigate the distribution of brGDGTs in 470 samples from 96 peatlands around the world with a broad mean annual air temperature (−8 to 27 °C) and pH (3–8) range and present the first peat-specific brGDGT-based temperature and pH calibrations. Our results demonstrate that the degree of cyclisation of brGDGTs in peat is positively correlated with pH, pH = 2.49 × CBTpeat + 8.07 (n = 51, R2 = 0.58, RMSE = 0.8) and the …
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BDA Naafs, GN Inglis, Y Zheng, MJ Amesbury… - Geochimica et Cosmochimica Acta, 2017