A5047711522- Methane Hydrates and Related Phenomena
- Microbial Community Ecology and Physiology
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Hydrocarbon exploration and reservoir analysis
- Marine and coastal ecosystems
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Coastal wetland ecosystem dynamics
- Origins and Evolution of Life
- Marine Biology and Ecology Research
- Healthcare Systems and Challenges
- Clinical Nutrition and Gastroenterology
- Marine Bivalve and Aquaculture Studies
- Soil erosion and sediment transport
Institut Polytechnique de Bordeaux
2023-2024
Hong Kong University of Science and Technology
2024
University of Hong Kong
2024
Environnements et Paléoenvironnements Océaniques et Continentaux
2023-2024
Université de Bordeaux
2023-2024
Centre National de la Recherche Scientifique
2023-2024
Milieux environnementaux, transferts et interactions dans les hydrosystèmes et les sols
2023-2024
École Pratique des Hautes Études
2023-2024
Sorbonne Université
2023-2024
Ecosystèmes, Biodiversité, Evolution
2023
Abstract. Branched glycerol dialkyl tetraethers (brGDGTs) are bacterial lipids that have been widely used as environmental proxies in continental paleorecords. Another group of related lipids, branched monoalkyl (brGMGTs), has recently proposed a potential paleotemperature proxy. Nevertheless, the sources and dependencies both brGDGTs brGMGTs along river–sea continuum still poorly understood, complicating their application paleoenvironmental some aquatic settings. In this study, factors...
Abstract Volcanic ash is a major component of marine sediment, but its effect on the deep-sea carbon cycle remains enigmatic. Here, we analyzed mineralogical compositions and glycerol dialkyl tetraether (GDGT) membrane lipids in submarine tuffs from Mariana Trough, demonstrating fraction organic associated with volcanic produced situ. This likely derives chemolithotrophic communities supported by alteration material. Tuff GDGTs are characterized enrichment branched GDGTs, as communities....
Branched glycerol dialkyl tetraethers (brGDGTs) are bacterial lipids that have been largely used as environmental proxies in continental paleorecords. Another group of related lipids, branched monoalkyl (brGMGTs), has recently proposed a potential paleotemperature proxy. Nevertheless, the sources and dependencies both brGDGTs brGMGTs along river-sea continuum still poorly understood, complicating their application paleoenvironmental aquatic settings. In this study, factors controlling...
Abstract Branched glycerol dialkyl tetraethers (brGDGTs) are bacterial lipids that can be preserved in sedimentary archives for tens of millions years and ubiquitous diverse environments, including cold seep systems. Their potential implications detecting methane activity deep time are, however, hampered by the multiple sources brGDGTs seeps lack evidence their stable carbon isotopes. Here, we show characterized depleted isotopic compositions alkyl moieties (δ 13 C = −32.9‰ to −82.7‰),...
Summary Estuaries are essential from ecological, economical and biogeochemical points of view. Constraining the organic matter (OM) origin in such ecosystems is challenging, as estuarine OM can originate rivers, coastal ocean or be produced within estuary itself. This complexity limit use bulk proxies for distinguishing sources zones. To overcome limitations geochemical proxies, several Branched Isoprenoid Tetraether (BIT) index based on branched glycerol dialkyl tetraethers (brGDGTs)...