A5006104774- Methane Hydrates and Related Phenomena
- Microbial Community Ecology and Physiology
- Healthcare Systems and Public Health
- Hydrocarbon exploration and reservoir analysis
- Polar Research and Ecology
- Geology and Paleoclimatology Research
- Water Resources and Management
- Atmospheric and Environmental Gas Dynamics
- Genomics and Phylogenetic Studies
University of Bremen
2020-2021
Max Planck Institute for Marine Microbiology
2020-2021
The flux of methane, a potent greenhouse gas, from the seabed is largely controlled by anaerobic oxidation methane (AOM) coupled to sulfate reduction (S-AOM) in transition (SMT). S-AOM estimated oxidize 90 % produced marine sediments and governed consortium methanotrophic archaea (ANME) reducing bacteria. An additional sink, i.e., iron oxide AOM (Fe-AOM), has been suggested be active methanic zone sediments. Geochemical signatures below SMT such as high dissolved iron, low undetectable...
Abstract Permanently cold marine sediments are heavily influenced by increased input of iron as a result accelerated glacial melt, weathering, and erosion. The impact such environmental changes on microbial communities in coastal is poorly understood. We investigated geochemical parameters that shape community compositions anoxic surface four geochemically differing sites (Annenkov Trough, Church Cumberland Bay, Drygalski Trough) around South Georgia, Southern Ocean. Sulfate reduction...
Anaerobic methane oxidizing archaea (ANME) mediate anaerobic oxidation of (AOM) in marine sediments and are therefore important for controlling atmospheric concentrations the water column ultimately atmosphere. Numerous previous studies have revealed that AOM is coupled to reduction different electron acceptors such as sulfate, nitrate/nitrite or Fe(III)/Mn(IV). However, influence acceptor availability on situ ANME community composition remains largely unknown. Here, we investigated compared...
<p>The deep water of the North Pacific Ocean is enriched in CO<sub>2</sub> and nutrients as a result organic matter degradation column surface sediments. Due to its large volume, may have played fundamental role for postulated glacial carbon sequestration leading observed drawdown atmospheric CO<sub>2</sub>. As consequence increased levels ocean, bottom-water oxygen concentrations must been correspondingly low compared...