2017/06/30 · Concurrent Methane Production and Oxidation in Surface Sediment from Aarhus Bay, Denmark. Ke-Qing Xiao *, Felix Beulig, Kasper U. Kjeldsen, Bo B. Jørgensen and Nils Risgaard-Petersen. Center for Geomicrobiology, Department of Bioscience, Aarhus University, Aarhus, Denmark. Marine surface sediments, which are replete with sulfate, are typically