Strong linkage between benthic oxygen uptake and bacterial tetraether lipids in deep-sea trench regions

Xiao，Wenjie1,2,3; Xu，Yunping2; Canfield，Donald E.1,4; Wenzhöfer，Frank1,5,6; Zhang，Chuanlun3,7; Glud，Ronnie N.1,2,4,8

2024-12-01

10.1038/s41467-024-47660-3

Nature Communications   影响因子和分区

2041-1723

Oxygen in marine sediments regulates many key biogeochemical processes, playing a crucial role in shaping Earth’s climate and benthic ecosystems. In this context, branched glycerol dialkyl glycerol tetraethers (brGDGTs), essential biomarkers in paleoenvironmental research, exhibit an as-yet-unresolved association with sediment oxygen conditions. Here, we investigated brGDGTs in sediments from three deep-sea regions (4045 to 10,100 m water depth) dominated by three respective trench systems and integrated the results with in situ oxygen microprofile data. Our results demonstrate robust correlations between diffusive oxygen uptake (DOU) obtained from microprofiles and brGDGT methylation and isomerization degrees, indicating their primary production within sediments and their strong linkage with microbial diagenetic activity. We establish a quantitative relationship between the Isomerization and Methylation index of Branched Tetraethers (IMBT) and DOU, suggesting its potential validity across deep-sea environments. Increased brGDGT methylation and isomerization likely enhance the fitness of source organisms in deep-sea habitats. Our study positions brGDGTs as a promising tool for quantifying benthic DOU in deep-sea settings, where DOU is a key metric for assessing sedimentary organic carbon degradation and microbial activity.

SCI

英语

通讯

2-s2.0-85191058650

Scopus

1.Department of Biology,HADAL & amp; Nordcee,University of Southern Denmark,Odense M,5230,Denmark
2.Shanghai Frontiers Research Center of the Hadal Biosphere,College of Oceanography and Ecological Science,Shanghai Ocean University,Shanghai,201306,China
3.Shenzhen Key Laboratory of Marine Archaea Geo-Omics,Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Danish Institute for Advanced Study (DIAS),University of Southern Denmark,Odense M,5230,Denmark
5.HGF-MPG Group for Deep Sea Ecology & amp; Technology,Alfred Wegener Institute Helmholtz Centre for Polar- and Marine Research,Bremerhaven,Am Handelshafen 12,27570,Germany
6.Max Planck Institute for Marine Microbiology,Bremen,Celsiusstr 1,D-28359,Germany
7.Shanghai Sheshan National Geophysical Observatory,Shanghai,201602,China
8.Department of Ocean and Environmental Sciences,Tokyo University of Marine Science and Technology,Tokyo,26 108-8477,Japan

Xiao，Wenjie,Xu，Yunping,Canfield，Donald E.,et al. Strong linkage between benthic oxygen uptake and bacterial tetraether lipids in deep-sea trench regions[J]. Nature Communications,2024,15(1).

Xiao，Wenjie,Xu，Yunping,Canfield，Donald E.,Wenzhöfer，Frank,Zhang，Chuanlun,&Glud，Ronnie N..(2024).Strong linkage between benthic oxygen uptake and bacterial tetraether lipids in deep-sea trench regions.Nature Communications,15(1).

Xiao，Wenjie,et al."Strong linkage between benthic oxygen uptake and bacterial tetraether lipids in deep-sea trench regions".Nature Communications 15.1(2024).