Results 1 to 10 of about 1,711 (160)

Archaeal Hydroxylated Isoprenoid GDGTs in Asian Lake Sediments: A New Tool for Terrestrial Paleotemperature Reconstructions

Geophysical Research Letters
Hydroxylated isoprenoid GDGTs (OH‐GDGTs) have emerged as a novel tool for reconstructing sea surface temperatures. However, when using marine OH‐GDGT calibration in lacustrine settings, it leads to a significant overestimation of temperatures ...
Huan Yang, Liping Zhu, Shucheng Xie
exaly   +3 more sources

Disentangling Effects of Sea Surface Temperature and Water Depth on Hydroxylated Isoprenoid GDGTs: Insights From the Hadal Zone and Global Sediments

Geophysical Research Letters, 2023
Hydroxylated isoprenoid glycerol dialkyl glycerol tetraethers (OH‐GDGTs) preserved in marine sediments are thought to be controlled by sea surface temperature (SST). However, water depth may also exert a significant influence on OH‐GDGTs.
Yunping Xu, Frank Wenzhöfer, Wenjie Xiao   +2 more
exaly   +2 more sources

Nitrosopumilus as main source of isoprenoid glycerol dialkyl glycerol tetraether lipids in the central Baltic Sea [PDF]

Frontiers in Microbiology, 2023
Nitrososphaeria in the phylum Crenarchaeota, is a widespread archaeal class in the oceanic realm, playing an important role in the marine carbon and nitrogen cycle.
Anna Katharina Wittenborn, Thorsten Bauersachs, Christiane Hassenrück, Katja Käding, Janine Wäge-Recchioni, Klaus Jürgens, Helge Wolfgang Arz, Jérôme Kaiser   +7 more
doaj   +2 more sources

Lipidomic diversity and proxy implications of archaea from cold seep sediments of the South China Sea [PDF]

Frontiers in Microbiology, 2023
Cold seeps on the continental margins are characterized by intense microbial activities that consume a large portion of methane by anaerobic methanotrophic archaea (ANME) through anaerobic oxidation of methane (AOM).
Tingting Zhang, Tingting Zhang, Tingting Zhang, Wei He, Qianyong Liang, Qianyong Liang, Qianyong Liang, Fengfeng Zheng, Xi Xiao, Xi Xiao, Zhiyu Zeng, Jingzhuo Zhou, Wenyong Yao, Haodong Chen, Yuanqing Zhu, Yuanqing Zhu, Jing Zhao, Yan Zheng, Yan Zheng, Chuanlun Zhang, Chuanlun Zhang, Chuanlun Zhang   +21 more
doaj   +2 more sources

Membrane lipid and expression responses of Saccharolobus islandicus REY15A to acid and cold stress [PDF]

Frontiers in Microbiology, 2023
Archaea adjust the number of cyclopentane rings in their glycerol dibiphytanyl glycerol tetraether (GDGT) membrane lipids as a homeostatic response to environmental stressors such as temperature, pH, and energy availability shifts.
Beverly K. Chiu, Jacob Waldbauer, Felix J. Elling, Felix J. Elling, Öykü Z. Mete, Öykü Z. Mete, Lichun Zhang, Ann Pearson, Erin M. Eggleston, William D. Leavitt, William D. Leavitt   +10 more
doaj   +2 more sources

Biosynthesis of GMGT lipids by a radical SAM enzyme associated with anaerobic archaea and oxygen-deficient environments [PDF]

Nature Communications
Archaea possess characteristic membrane-spanning lipids that are thought to contribute to the adaptation to extreme environments. However, the biosynthesis of these lipids is poorly understood.
Yanan Li, Ting Yu, Xi Feng, Bo Zhao, Huahui Chen, Huan Yang, Xing Chen, Xiao-Hua Zhang, Hayden R. Anderson, Noah Z. Burns, Fuxing Zeng, Lizhi Tao, Zhirui Zeng   +12 more
doaj   +2 more sources

Molecular Characterization of Glycerol Dialkyl Glycerol Tetraethers by High Resolution Orbitrap Mass Spectrometry [PDF]

Zhipu Xuebao, 2021
Isoprenoidal glycerol dibiphytanyl glycerol tetraethers (iso-GDGTs) and branched glycerol dialkyl glycerol tetraethers (br-GDGTs) have been widely used as biomarkers of archaea and bacteria for the investigation of paleoenvironment. The analysis of GDGTs
LI Yun-yun, HE Chen, WU Jian-xun, ZHANG Ya-he, LIANG Yong-mei, SHI Quan, ZHANG Chuan-lun   +6 more
doaj   +1 more source

Application of microbial membrane tetraether lipids in speleothems

Frontiers in Ecology and Evolution, 2023
Glycerol dialkyl glycerol tetraethers (GDGTs), which are derived from microbial membranes, occur widely in soils, peats, lake sediments, marine sediments, hot springs, and other environments.
Jingjie Zang, Huan Yang, Huan Yang, Jiahao Zhang, Huiru Tang, Huiru Tang, Liangcheng Tan, Liangcheng Tan   +7 more
doaj   +1 more source

Archaeal intact polar lipids in polar waters: a comparison between the Amundsen and Scotia seas [PDF]

Biogeosciences, 2021
The West Antarctic Ice Sheet (WAIS) is one of the largest potential sources of future sea-level rise, with glaciers draining the WAIS thinning at an accelerating rate over the past 40 years.
C. L. Spencer-Jones, E. L. McClymont, N. J. Bale, E. C. Hopmans, S. Schouten, S. Schouten, J. Müller, E. P. Abrahamsen, C. Allen, T. Bickert, C.-D. Hillenbrand, E. Mawbey, V. Peck, A. Svalova, J. A. Smith   +14 more
doaj   +1 more source

Exploring the Influences of Temperature on “H-Shaped” Glycerol Dialkyl Glycerol Tetraethers in a Stratigraphic Context: Evidence From Two Peat Cores Across the Late Quaternary

Frontiers in Earth Science, 2021
Unusual “H-Shaped” branched and isoprenoidal glycerol monoalkyl glycerol tetraethers (GMGTs, or H-GDGTs) have been found in peat, lake, and ocean sediments.
Xiaotong Tang, B. David A. Naafs, Richard D. Pancost, Zhao Liu, Tongyu Fan, Yanhong Zheng, Yanhong Zheng   +6 more
doaj   +1 more source