Results 71 to 80 of about 2,346 (185)

Evaluating Production of Cyclopentyl Tetraethers by Marine Group II Euryarchaeota in the Pearl River Estuary and Coastal South China Sea: Potential Impact on the TEX86 Paleothermometer

Frontiers in Microbiology, 2017
TEX86 [TetraEther indeX of glycerol dialkyl glycerol tetraethers (GDGTs) with 86 carbon atoms] has been widely applied to reconstruct (paleo-) sea surface temperature.
Jin-Xiang Wang, Jin-Xiang Wang, Wei Xie, Yi Ge Zhang, Travis B. Meador, Chuanlun L. Zhang, Chuanlun L. Zhang   +6 more
doaj   +1 more source

Temperature Sensitivity of Leaf Wax n‐Alkane Carbon Isotopes: Mechanisms and Implications for Terrestrial Paleoclimates

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract While climate signals encapsulated in the 13C content of C3 plants' leaf wax n‐alkanes are largely tied to precipitation, they may also be sensitive to plant physiological responses to temperature. In this study, statistical analyses on a global data set of modern plants reveal a correlation between the 13C discrimination for leaf waxes ...
Hao Xie, Max K. Lloyd, Allison A. Baczynski, Aaron F. Diefendorf, Katherine H. Freeman   +4 more
wiley   +1 more source

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Marine ammonia oxidizing archaea (AOA) produce isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which form the basis of seawater temperature proxy TEX86. Although most studies use TEX86 for sea surface temperature (SST) reconstructions, maximum GDGT production occurs at and below the nitracline. Moreover, sedimentary GDGT‐2/GDGT‐3
Addison Rice, Eunmi Park, Gesine Mollenhauer, Daisy Bouwmans, Anouk van Boxtel, Gert J. de Lange, Ryan Paul, Francesca Sangiorgi, Ryan Smulders, Jan‐Berend Stuut, Martin Ziegler, Appy Sluijs, Francien Peterse   +12 more
wiley   +1 more source

Total Synthesis of the Membrane Spanning Tetraether Lipid brGDGT Ia and Elucidation of its Stereochemical Configuration [PDF]

Glycerol dialkyl glycerol tetraethers (GDGTs) are a group of membrane spanning lipids produced by both Archaea and Bacteria. Branched GDGTs (brGDGTs) are a class of these tetraether lipids known to be produced by certain bacteria and are commonly found ...
Minnaard, Adriaan J; id_orcid, Kopf, Sebastian H, Mahapatra, Samarpita, Halamka, Toby, Drost, Deborah A, Merten, Christian   +5 more
core   +1 more source

Evaluating the Reliability of Grain‐Size Sorting for Organic Biomarker Analysis

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Organic and inorganic geochemical proxies are fundamental for interpreting past climate variability. For inorganic analysis, marine sediments are often size fractionated to isolate foraminifera, while organic analysis employs subsamples of bulk sediment.
J. S. Hingley, P. S. Bray, T. Agterhuis, G. L. Foster, B. S. Wade, J. H. Whiteside, G. N. Inglis   +6 more
wiley   +1 more source

Data_Sheet_1_Planktonic Archaeal Ether Lipid Origins in Surface Waters of the North Pacific Subtropical Gyre.docx

, 2021
Thaumarchaeota and Thermoplasmatota are the most abundant planktonic archaea in the sea. Thaumarchaeota contain tetraether lipids as their major membrane lipids, but the lipid composition of uncultured planktonic Thermoplasmatota representatives remains ...
Andy Leu (11424610), Laura T. Carlson (4732056), Fuyan Li (6829961), Edward F. DeLong (164309), Anitra E. Ingalls (2255761), Kirsten Poff (11424613)   +5 more
core   +1 more source

Biomarker evidence of a serpentinite chemosynthetic biosphere at the Mariana forearc

Communications Earth & Environment
Present-day serpentinization systems, such as that at the Mariana forearc, are prominent sources of reduced volatiles, including molecular hydrogen (H2) and methane (CH4), and are considered analogs for chemosynthetic ecosystems on early Earth.
Palash Kumawat, Elmar Albers, Wolfgang Bach, Frieder Klein, Walter Menapace, Christoph Vogt, Florence Schubotz   +6 more
doaj   +1 more source

Effect of Headgroups on Small‐Ion Permeability across Archaea‐Inspired Tetraether Lipid Membranes [PDF]

, 2016
This paper examines the effects of four different polar headgroups on small-ion membrane permeability from liposomes comprised of Archaea-inspired glycerolmonoalkyl glycerol tetraether (GMGT) lipids.
David Onofrei, Michael Mayer, Takaoki Koyanagi, Yep, Alvin, Geoffray Leriche, Onofrei, David, Jerry Yang, Yang, Jerry, Gregory P. Holland, Koyanagi, Takaoki, Holland, Gregory P, Leriche, Geoffray, Mayer, Michael, Alvin Yep   +13 more
core   +1 more source

Microbial Distributions Across Wide‐Ranging Temperature Gradients of Hot Springs in Thailand: A Review of 35 Years of Research on Hot Spring‐Associated Microorganisms

Environmental Microbiology Reports, Volume 18, Issue 1, February 2026.
This review article summarised 35 years of research on microbial distributions (bacteria, archaea and microbial eukaryotes) across wide‐ranging hot spring temperatures in Thailand, including the overall research progression, scopes and methodologies of previous studies.
C. Sriaporn, K. Phinyo, U. Sompong, J. Pekkoh, J. Homnan, S. Komonjinda   +5 more
wiley   +1 more source

Cyclohexane Rings Reduce Membrane Permeability to Small Ions in Archaea‐Inspired Tetraether Lipids [PDF]

, 2016
Extremophile archaeal organisms overcome problems of membrane permeability by producing lipids with structural elements that putatively improve membrane integrity compared to lipids from other life forms. Herein, we describe a series of lipids that mimic
David Onofrei, Michael Mayer, Takaoki Koyanagi, Geoffray Leriche, Onofrei, David, Holland, Gregory P., Jerry Yang, Yang, Jerry, Gregory P. Holland, Koyanagi, Takaoki, Holland, Gregory P, Leriche, Geoffray, Mayer, Michael   +12 more
core   +1 more source