A5029883310- Microbial Community Ecology and Physiology
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Protist diversity and phylogeny
- Marine Biology and Ecology Research
- Carbon Dioxide Capture Technologies
- Wastewater Treatment and Nitrogen Removal
- Atmospheric aerosols and clouds
- Climate variability and models
- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Indoor Air Quality and Microbial Exposure
- Radiomics and Machine Learning in Medical Imaging
- Paleontology and Stratigraphy of Fossils
- Analytical Chemistry and Chromatography
- Diet and metabolism studies
- Geochemistry and Elemental Analysis
- Chemical Reactions and Isotopes
- Atmospheric Ozone and Climate
- Genomics and Phylogenetic Studies
- CO2 Sequestration and Geologic Interactions
- Adsorption, diffusion, and thermodynamic properties of materials
- Ocean Acidification Effects and Responses
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2025
Max Planck Institute for Marine Microbiology
2018-2024
Board of the Swiss Federal Institutes of Technology
1982
Givaudan (Switzerland)
1982
Abstract Nitrogen (N 2 ) fixation in oligotrophic surface waters is the main source of new nitrogen to ocean 1 and has a key role fuelling biological carbon pump . Oceanic N been attributed almost exclusively cyanobacteria, even though genes encoding nitrogenase, enzyme that fixes into ammonia, are widespread among marine bacteria archaea 3–5 Little known about these non-cyanobacterial fixers, direct proof they can fix so far lacking. Here we report discovery -fixing symbiont, ‘ Candidatus...
Abstract. The eastern tropical North Atlantic (ETNA) is characterized by a highly productive coastal upwelling system and moderate oxygen minimum zone with lowest open-ocean (O2) concentrations of approximately 40 μmol kg−1. recent discovery re-occurring mesoscale eddies close to anoxic O2 (< 1 kg−1) located just below the mixed layer has challenged our understanding distribution biogeochemical processes in this area. Here, we present first microbial community study from deoxygenated...
Abstract Biological N 2 fixation was key to the expansion of life on early Earth. The -fixing microorganisms and nitrogenase type used in Proterozoic are unknown, although it has been proposed that canonical molybdenum-nitrogenase not due low molybdenum availability. We investigate Lake Cadagno, an analogue system sulfidic continental margins, using a combination biogeochemical, molecular single cell techniques. In purple sulfur bacteria (PSB) responsible for high rates, our knowledge...
Anoxygenic phototrophic sulfide oxidation by green and purple sulfur bacteria (PSB) plays a key role in removal from anoxic shallow sediments stratified waters. Although some PSB can also oxidize with nitrate oxygen, little is known about the prevalence of this chemolithotrophic lifestyle environment. In study, we investigated these phototrophs light-independent chemocline Lake Cadagno. Our temporally resolved, high-resolution chemical profiles indicated that dark was coupled to high oxygen...
Abstract Methylphosphonate is an organic phosphorus compound used by microorganisms when phosphate, a key nutrient limiting growth in most marine surface waters, becomes unavailable. Microbial methylphosphonate use can result the formation of methane, potent greenhouse gas, oxic waters where methane production traditionally unexpected. The extent and controlling factors such aerobic remain underexplored. Here, we show high potential net rates methylphosphonate-driven (median 0.4 nmol L −1 d...
Abstract Marine carbon dioxide removal (mCDR) and geological storage in the marine environment (mCS) promise to help mitigate global climate change alongside drastic emission reductions. However, implementable potential of mCDR mCS depends, apart from technology readiness, also on site‐specific conditions. In this work, we explore different options for mCS, using German context as a case study. We challenge each option remove 10 Mt CO 2 yr −1 , accounting 8%–22% projected hard‐to‐abate...
Abstract. The eastern tropical North Atlantic (ETNA) is characterized by a highly productive coastal upwelling system and moderate oxygen minimum zone with lowest open ocean (O2) concentrations of around 40 μmol kg−1. Only recently, the discovery re-occurring mesoscale eddies sometimes close to anoxic O2 (<1 kg−1) located just below mixed layer challenged our understanding distribution biogeochemical processes in this area. Here, we present first metagenomic dataset from deoxygenated...
Marine carbon dioxide removal (mCDR) and geological storage in the marine environment (mCS) promise to contribute mitigation of global climate change combination with drastic emission reductions. However, implementable potential mCDR mCS depends, apart from technology readiness, also on site-specific conditions. In this paper, we explore different options for mCS, using German context as a case study. We challenge each option remove 10 Mt CO2 yr-1, which accounts 8-22% projected...
SUMMARY Anoxygenic phototrophic sulfide oxidation by green and purple sulfur bacteria (PSB) plays a key role in removal from anoxic shallow sediments stratified waters. Although some PSB can also oxidize with nitrate oxygen, little is known about the prevalence of this chemolithotrophic lifestyle environment. In study, we investigated these phototrophs light-independent chemocline Lake Cadagno. Our temporally resolved, high-resolution chemical profiles indicated that dark was coupled to high...
&lt;p&gt;The surface waters of the open ocean are mostly oversaturated with methane and thus act as a net source to atmosphere. &lt;em&gt;In situ&lt;/em&gt; production from methylated compounds or inorganic carbon has been proposed potential in oxygenated waters. However, distribution importance aerobic different marine regions remains poorly constrained. We investigated processes microorganisms involved western Tropical North Atlantic off Barbados. Using stable...