Distribution, potential sources, and response to water depth of archaeal tetraethers in Tibetan Plateau lake sediments

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

“…Yujiasan and Erxianyuan peatland were 16.7 ± 3.6°C and 12.3 ± 1.8°C, respectively, consistent with actual MAAT (17°C and 14°C, respectively; Man et al, 2023). This indicates the similar temperature adaptation Kou et al, 2022;Sinninghe Damsté, Weber, et al, 2022;Li et al, 2023;Zheng et al, 2023), against sea surface temperatures (SST) in marine surface sediments (Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y. Yang et al, 2018), and against MAAT in peat and soils (Man et al, 2023;.…”

“…The isoGDGTs are mainly produced by a range of archaeal groups that possess Tes (Tetraether synthase) gene (Lloyd et al, 2022;Zeng et al, 2022), including Group 1.1b and 1.1a Thaumarchaeota, some methanogenic archaea and Bathyarchaeota (Besseling et al, 2018;Schouten et al, 2013). The isoGDGT distributions of lake surface sediments in this study are generally different from that in the pure cultures of Group 1.1b and 1.1a Thaumarchaeota (Figure 2a The distributions of fractional abundance of GDGT-0 against Cren/Cren′ in lake surface sediments in West China (this study), in surrounding soils from West China lakes (Kou et al, 2022;Li et al, 2023;Wu et al, 2021), in pure cultures of Group 1.1a Thaumarchaeota (Elling et al, 2014(Elling et al, , 2017Pitcher et al, 2011;Qin et al, 2015;Sinninghe Damsté et al, 2012) and Group 1.1b Thaumarchaeota (Elling et al, 2017;Pitcher et al, 2010;Sinninghe Damsté et al, 2012), and the intact polar lipid GDGTs data in surface sediments from Lake Yangzonghai (water depth >20m) where methanogenic archaea are the major Archaea (∼45%; Wu et al, 2021).…”

“…The lake surface sediments in this study exhibit a higher fractional abundance of GDGT-0 and a higher value of Cren/Cren′ compared to the corresponding regional soils (Figure 2a; 0.63 ± 0.22 vs. 0.37 ± 0.20 and 49 ± 39 vs. 7 ± 14, respectively). (Kou et al, 2022;Li et al, 2023;Sinninghe Damsté, Weber, et al, 2022;Zheng et al, 2023), marine surface sediments (Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y. Yang et al, 2018), soils and peat sediments (Man et al, 2023;.…”

“…In terms of the statistical result, we, therefore, used the Asian lake data set to establish the first RI-OH-temperature calibration for lacustrine settings. The equation is as follows: Wang et al, 2019;Kou et al, 2022;Sinninghe Damsté, Weber, et al, 2022;Li et al, 2023;Zheng et al, 2023). One point with only GDGT-0 detected in panel (a) is excluded, which prevents the calculation of TEX 86 .…”

“…Figure 4. (a) Comparison of RI-OH and RI-OH′ against MLWT in lake surface sediments (this study; H Wang et al, 2019;Kou et al, 2022;Sinninghe Damsté, Weber, et al, 2022;Li et al, 2023;Zheng et al, 2023),. against sea surface temperatures (SST) in marine surface sediments(Fietz et al, 2013(Fietz et al, , 2016Harning et al, 2023;Huguet et al, 2013;Kaiser & Arz, 2016;Lamping et al, 2021;Lü et al, 2015;Varma et al, 2024;Wei et al, 2020;Y.…”