AUTHOR=Paraiso Julienne J. , Williams Amanda J. , Huang Qiuyuan , Wei Yuli , Dijkstra Paul , Hungate Bruce A., Dong Hailiang , Hedlund Brian P., Zhang Chuanlun TITLE=The distribution and abundance of archaeal tetraether lipids in U.S. Great Basin hot springs JOURNAL=Frontiers in Microbiology VOLUME=4 YEAR=2013 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2013.00247 DOI=10.3389/fmicb.2013.00247 ISSN=1664-302X ABSTRACT=
Isoprenoidal glycerol dialkyl glycerol tetraethers (iGDGTs) are core membrane lipids of many archaea that enhance the integrity of cytoplasmic membranes in extreme environments. We examined the iGDGT profiles and corresponding aqueous geochemistry in 40 hot spring sediment and microbial mat samples from the U.S. Great Basin with temperatures ranging from 31 to 95°C and pH ranging from 6.8 to 10.7. The absolute abundance of iGDGTs correlated negatively with pH and positively with temperature. High lipid concentrations, distinct lipid profiles, and a strong relationship between polar and core lipids in hot spring samples suggested