A5041435878- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Methane Hydrates and Related Phenomena
- Marine Biology and Ecology Research
- Wastewater Treatment and Nitrogen Removal
- Protist diversity and phylogeny
- Microbial Fuel Cells and Bioremediation
- Marine Bivalve and Aquaculture Studies
- Marine and coastal ecosystems
- Vibrio bacteria research studies
- Bacterial biofilms and quorum sensing
- Ocean Acidification Effects and Responses
- Water Treatment and Disinfection
- Mine drainage and remediation techniques
- Corrosion Behavior and Inhibition
- Electrochemical Analysis and Applications
- Reproductive tract infections research
- Marine Biology and Environmental Chemistry
- Soil and Water Nutrient Dynamics
- Computer Graphics and Visualization Techniques
- Neural Networks and Applications
- Antibiotics Pharmacokinetics and Efficacy
- Neutrophil, Myeloperoxidase and Oxidative Mechanisms
- Industrial Gas Emission Control
- Algal biology and biofuel production
University of Vienna
2009-2023
Max Planck Institute for Marine Microbiology
2011-2021
Ecologie Microbienne Lyon
2011-2020
Max Planck Society
2005-2015
Chemosynthetic symbioses are partnerships between invertebrate animals and chemosynthetic bacteria. The latter the primary producers, providing most of organic carbon needed for animal host's nutrition. We sequenced genomes symbionts from lucinid bivalve Loripes lucinalis stilbonematid nematode Laxus oneistus. both host species encoded nitrogen fixation genes. This is remarkable as no marine symbiont was previously known to be capable fixation. detected nitrogenase expression by clams at...
Summary Members of the Bacteroidetes , formerly known as Cytophaga‐Flavobacteria‐Bacteroides (CFB) phylum, are among major taxa marine heterotrophic bacterioplankton frequently found on macroscopic organic matter particles (marine snow). In addition, they have been shown to also represent a significant part free‐living microbial assemblages in nutrient‐rich microenvironments. Their abundance and distribution pattern combination with enzymatic activity studies has led notion that organisms...
Nitrification is a core process in the global nitrogen cycle that essential for functioning of many ecosystems. The discovery autotrophic ammonia-oxidizing archaea (AOA) within phylum Thaumarchaeota has changed our perception microbiology nitrification, particular since their numerical dominance over bacteria (AOB) environments been revealed. These and other data have led to widely held assumption all amoA-encoding members (AEA) are nitrifiers. In this study, 52 municipal industrial...
In situ identification of prokaryotic cells in subsurface sediments is hampered by the low cellular rRNA contents target organisms. Fluorescence hybridization with catalyzed reporter deposition (CARD-FISH) has potential to overcome this limitation, and was therefore optimized for a 40 cm deep sediment core sampled from tidal sandy flat German Wadden Sea. Treatment methanol H(2)O(2) inactivated endogenous peroxidases effectively reduced background signal. Percentage DAPI stained detected...
Sulfur-oxidizing prokaryotes (SOP) catalyse a central step in the global S-cycle and are of major functional importance for variety natural engineered systems, but our knowledge on their actual diversity environmental distribution patterns is still rather limited. In this study we developed specific PCR assay detection dsrAB that encode reversely operating sirohaem dissimilatory sulfite reductase (rDSR) present many not all published genomes SOP. The was used to screen 42 strains SOP (most...
Marine sediments are frequently covered by mats of the filamentous Beggiatoa and other large nitrate-storing bacteria that oxidize hydrogen sulfide using either oxygen or nitrate, which they store in intracellular vacuoles. Despite their conspicuous metabolic properties biogeochemical importance, little is known about genetic repertoire because lack pure cultures. Here, we present a unique approach to access genome single filaments combining whole amplification, pyrosequencing, optical...
Summary The oxidation of hydrogen sulfide is essential to sulfur cycling in marine habitats. However, the role microbial sediments and microorganisms involved are largely unknown, except for filamentous, mat‐forming bacteria. In this study we explored diversity, abundance activity sulfur‐oxidizing prokaryotes (SOP) sulfidic intertidal using 16S rRNA functional gene sequence analyses, fluorescence situ hybridization (FISH) microautoradiography. analysis revealed that distinct clades...
The diversity and distribution of Deltaproteobacteria in an intertidal mud flat the German Wadden Sea was characterized by molecular biological techniques cultivation. A 16S rRNA gene library generated with general primers (303 clones) suggested that sulfate-reducing bacteria (SRB) related to Desulfobulbaceae Desulfosarcina were abundant. Fluorescence situ hybridization (FISH) probes targeting these groups used characterize their vertical distribution. combination FISH catalysed reporter...
Summary Among the dominant deltaproteobacterial sulfate‐reducing bacteria ( SRB ), members of genus D esulfobacula are not only present in (hydrocarbon‐rich) marine sediments, but occur also frequently anoxic water bodies encountered upwelling areas. Here, we 5.2 Mbp genome toluolica Tol2 , which is first an aromatic compound‐degrading, . The has apparently been shaped by viral attacks (e.g. CRISPRs ) and its high plasticity reflected 163 detected genes related to transposases integrases, a...
Abstract The oscillating redox conditions that characterize coastal sandy sediments foster microbial communities capable of respiring oxygen and nitrate simultaneously, thereby increasing the potential for organic matter remineralization, nitrogen (N)-loss emissions greenhouse gas nitrous oxide. It is unknown to what extent these also lead overlaps between dissimilatory sulfate respiration. Here, we show respiration co-occur in surface an intertidal sand flat. Furthermore, found strong...
Filamentous sulphide-oxidizing Beggiatoa spp. often occur in large numbers the coastal seabed without forming visible mats on sediment surface. We studied diversity, population structure and nitrate-storing capability of such bacteria Danish Limfjorden German Wadden Sea. Their distribution was compared to vertical gradients O2, NO3- H2S as measured by microsensors. The main populations occurred a 0.5-3 cm thick intermediate zone, below depth oxygen nitrate penetration but above zone free...
Two psychrophilic, Gram-negative, rod-shaped, motile bacteria (strains 112T and 102T) that conserved energy from dissimilatory Fe(III) reduction concomitant with acetate oxidation were isolated permanently cold Arctic marine sediments. Both strains grew at temperatures down to -2 degrees C, respective temperature optima of 14 C 14-17 for 102T. The reduced using common fermentation products such as acetate, lactate, propionate, formate or hydrogen electron donors, they also fumarate the sole...