Hydrogen (H 2 ) and methane (CH 4 ) are produced in the anoxic layers of wetlands and sediments. In the overlaying oxygenated surface layers, these gases become available for oxidation by aerobic hydrogenotrophic and methanotrophic microorganisms. While H 2 oxidation by verrucomicrobial methane‐oxidising bacteria (MOB) is extensively studied, less is known about this metabolism in MOB from the class Alphaproteobacteria , which...

We reconstructed middle to late Holocene changes in atmospheric circulation patterns and vegetation in north‐west Europe by applying novel geochemical techniques to the sediment record of Lake Uddelermeer (The Netherlands). A comparison of higher plant‐derived leaf wax n ‐alkane distributions archived in the lake sediments with those in living plant material, combined with palynological analysis, indicates that the vegetation...

Soils, fine‐grained ice‐rafted detritus (IRD), coals, and marine surface sediments in the Arctic realm (Svalbard) were collected in 2007 and 2008 to characterize organic matter (OM) sources in Arctic marine sediments. Bulk geochemical (C : N ratio and stable carbon isotopic composition) parameters suggest a predominant marine contribution to sedimentary OM. The branched and isoprenoid tetraether index (a proxy of soil OM input...

We determined the spatial distribution patterns of the Branched and Isoprenoid Tetraether (BIT) index, a specific proxy of riverborne soil organic carbon (OC) input from land to the ocean, by analyzing soils from the Têt watershed (France) and surface sediments from the Gulf of Lions (NW Mediterranean) into which the Têet and Rhône Rivers flow. The BIT index pattern in the Têt watershed is heterogeneously distributed, varying...