Marcus Elvert
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View article: Marine Cold Seep <scp>ANME</scp> ‐2/ <scp>SRB</scp> Consortia Produce Their Lipid Biomass From Inorganic Carbon
Marine Cold Seep <span>ANME</span> ‐2/ <span>SRB</span> Consortia Produce Their Lipid Biomass From Inorganic Carbon Open
In cold seeps, anaerobic methanotrophic archaea (ANME) and sulphate‐reducing bacteria (SRB) oxidise methane to inorganic carbon (IC) coupled to sulphate reduction. While catabolic pathways are well resolved, carbon flow into biomass as wel…
View article: Structural control and depth clustering of extensive hydrothermal venting on the shelf of Milos Island
Structural control and depth clustering of extensive hydrothermal venting on the shelf of Milos Island Open
High-resolution geophysical surveys, complemented by chemical, physical, and visual data collected via the ROV MARUM-SQUID, revealed a previously undocumented intermediate-depth hydrothermal vent field (30–230 m) on the shelf of Milos Isla…
View article: Diffusive and advective fluid flow shapes chemoautotrophic bacterial communities and sulfur mineralogy in hydrothermal sediments off Milos
Diffusive and advective fluid flow shapes chemoautotrophic bacterial communities and sulfur mineralogy in hydrothermal sediments off Milos Open
Hydrothermal fluid flow not only shapes mineral deposition on the ocean floor but also creates ecological niches by altering temperature and energy availability. In these niches, microbial life thrives and has an additional, often unrecogn…
View article: Marine cold seep ANME-2/SRB consortia produce their lipid biomass from inorganic carbon
Marine cold seep ANME-2/SRB consortia produce their lipid biomass from inorganic carbon Open
In cold seeps, anaerobic methanotrophic archaea (ANME) and sulfate-reducing bacteria (SRB) oxidize methane to inorganic carbon (IC) coupled to sulfate reduction. While catabolic pathways are well resolved, carbon flow into biomass remains …
View article: The energy-efficient reductive tricarboxylic acid cycle drives carbon uptake and transfer to higher trophic levels within the Kueishantao shallow-water hydrothermal system
The energy-efficient reductive tricarboxylic acid cycle drives carbon uptake and transfer to higher trophic levels within the Kueishantao shallow-water hydrothermal system Open
Chemoautotrophic Campylobacteria utilize the reductive tricarboxylic acid (rTCA) cycle for carbon uptake, a metabolic pathway that is more energy-efficient and discriminates less against 13C than the Calvin–Benson–Bassham cycle. Similar to…
View article: Ancient carbon flux into ecosystem biomass in shallow-water hydrothermal systems
Ancient carbon flux into ecosystem biomass in shallow-water hydrothermal systems Open
Hydrothermal vents introduce substantial amounts of 14C-free carbon into the ocean, primarily as CO2. While these emissions influence the global oceanic carbon pool, the mechanisms by which this carbon is integrated into marine ecosystems …
View article: Production of the disaccharide&#8217;s trehalose and sucrose by ANME&#8209;2/SRB consortia in a cold seep at the Astoria Canyon &#160;&#160;
Production of the disaccharide’s trehalose and sucrose by ANME‑2/SRB consortia in a cold seep at the Astoria Canyon    Open
The anaerobic oxidation of methane (AOM) coupled to sulfate reduction (SR) is a key microbial process in the sulfate-methane transition zones (SMTZ) of cold seeps. In this process, anaerobic methanotrophic archaea (ANME) oxidize methane to…
View article: Global warming facilitated environmental change effects on CO2 releasing microbes in Antarctic sediments
Global warming facilitated environmental change effects on CO2 releasing microbes in Antarctic sediments Open
Rapid melting of the Western Antarctic Peninsula (WAP) glaciers is a compelling piece of evidence of how climate change affects our planet. This study investigated the impact of global warming-facilitated environmental change on microbial …
View article: Rapid Down‐Slope Transport of Fresh Dissolved Organic Matter to the Deep Ocean in the Eastern North Atlantic
Rapid Down‐Slope Transport of Fresh Dissolved Organic Matter to the Deep Ocean in the Eastern North Atlantic Open
Intense convective mixing in the central North Atlantic is a major gateway for dissolved organic matter (DOM) into the deep ocean, sustaining elevated dissolved organic carbon (DOC) concentrations. Rapid down‐slope transport on adjacent Ir…
View article: The energy-efficient reductive tricarboxylic acid cycle drives carbon uptake and transfer to higher trophic levels within the Kueishantao shallow-water hydrothermal system
The energy-efficient reductive tricarboxylic acid cycle drives carbon uptake and transfer to higher trophic levels within the Kueishantao shallow-water hydrothermal system Open
Chemoautotrophic Campylobacteria utilize the reductive tricarboxylic acid (rTCA) cycle for carbon uptake, a metabolic pathway that is more energy efficient and discriminates less against 13C than the Calvin-Benson-Bassham cycle. Similar to…
View article: Secondary production and priming reshape the organic matter composition in marine sediments
Secondary production and priming reshape the organic matter composition in marine sediments Open
Organic matter (OM) transformations in marine sediments play a crucial role in the global carbon cycle. However, secondary production and priming have been ignored in marine biogeochemistry. By incubating shelf sediments with various 13 C-…
View article: Discovery of a unique submarine hydrothermal system between shallow photic and deep dark sites around the Greek island of Milos (Aegean Sea, Greece)
Discovery of a unique submarine hydrothermal system between shallow photic and deep dark sites around the Greek island of Milos (Aegean Sea, Greece) Open
On the Greek island Milos and in shallow water at its coast, many spots with hydrothermal activity have been found and studied in the past. The M192 cruise in August 2023 with the German research vessel METEOR followed the idea that these …
View article: Comprehensive molecular‐isotopic characterization of archaeal lipids in the Black Sea water column and underlying sediments
Comprehensive molecular‐isotopic characterization of archaeal lipids in the Black Sea water column and underlying sediments Open
The Black Sea is a permanently anoxic, marine basin serving as model system for the deposition of organic‐rich sediments in a highly stratified ocean. In such systems, archaeal lipids are widely used as paleoceanographic and biogeochemical…
View article: Unexpected carbon utilization activity of sulfate-reducing microorganisms in temperate and permanently cold marine sediments
Unexpected carbon utilization activity of sulfate-reducing microorganisms in temperate and permanently cold marine sediments Open
Significant amounts of organic carbon in marine sediments are degraded, coupled with sulfate reduction. However, the actual carbon and energy sources used in situ have not been assigned to each group of diverse sulfate-reducing microorgani…
View article: Hydrostatic pressure induces transformations in the organic matter and microbial community composition of marine snow particles
Hydrostatic pressure induces transformations in the organic matter and microbial community composition of marine snow particles Open
In the hadal zone of the ocean (6–11 km), the characteristics of sinking marine snow particles and their attached microbial communities remain elusive, despite their potential importance for benthic life thriving at extreme pressures (60–1…
View article: Influence of sedimentary deposition on the microbial assembly process in Arctic Holocene marine sediments
Influence of sedimentary deposition on the microbial assembly process in Arctic Holocene marine sediments Open
The sea-level rise during the Holocene (11–0 ky BP) and its resulting sedimentation and biogeochemical processes may control microbial life in Arctic sediments. To gain further insight into this interaction, we investigated a sediment core…
View article: Aerobic methanotrophy increases the net iron reduction in methanogenic lake sediments
Aerobic methanotrophy increases the net iron reduction in methanogenic lake sediments Open
In methane (CH 4 ) generating sediments, methane oxidation coupled with iron reduction was suggested to be catalyzed by archaea and bacterial methanotrophs of the order Methylococcales. However, the co-existence of these aerobic and anaero…
View article: Anaerobic degradation of organic carbon supports uncultured microbial populations in estuarine sediments
Anaerobic degradation of organic carbon supports uncultured microbial populations in estuarine sediments Open
Background A large proportion of prokaryotic microbes in marine sediments remains uncultured, hindering our understanding of their ecological functions and metabolic features. Recent environmental metagenomic studies suggested that many of…
View article: Microbial diversity gradients in the geothermal mud volcano underlying the hypersaline Urania Basin
Microbial diversity gradients in the geothermal mud volcano underlying the hypersaline Urania Basin Open
Mud volcanoes transport deep fluidized sediment and their microbial communities and thus provide a window into the deep biosphere. However, mud volcanoes are commonly sampled at the surface and not probed at greater depths, with the conseq…
View article: Additional file 1 of Anaerobic degradation of organic carbon supports uncultured microbial populations in estuarine sediments
Additional file 1 of Anaerobic degradation of organic carbon supports uncultured microbial populations in estuarine sediments Open
Additional file 1: Table S1. The list of samples used for DNA/RNA isolation and acetate measurements. Table S2. The overview of MAGs that were analyzed in this study. Table S3. The list of genes that are associated with benzoate degradatio…
View article: Microbial diversity gradients in the geothermal mud volcano underlying the hypersaline Urania Basin
Microbial diversity gradients in the geothermal mud volcano underlying the hypersaline Urania Basin Open
Mud volcanoes transport deep fluidized sediment and their microbial communities and thus provide a window into the deep biosphere. However, mud volcanoes are commonly sampled at the surface and not probed at greater depths, with the conseq…
View article: High Carbon Mineralization Rates in Subseafloor Hadal Sediments—Result of Frequent Mass Wasting
High Carbon Mineralization Rates in Subseafloor Hadal Sediments—Result of Frequent Mass Wasting Open
In the past 20 years, the exploration of deep ocean trenches has led to spectacular new insights. Even in the deepest canyons, an unusual variety of life and unexpectedly high benthic oxygen consumption rates have been detected while micro…
View article: Activity of Ancillary Heterotrophic Community Members in Anaerobic Methane-Oxidizing Cultures
Activity of Ancillary Heterotrophic Community Members in Anaerobic Methane-Oxidizing Cultures Open
Consortia of anaerobic methanotrophic archaea (ANME) and sulfate-reducing bacteria mediate the anaerobic oxidation of methane (AOM) in marine sediments. However, even sediment-free cultures contain a substantial number of additional microo…
View article: Long-term incubations provide insight into the mechanisms of anaerobic oxidation of methane in methanogenic lake sediments
Long-term incubations provide insight into the mechanisms of anaerobic oxidation of methane in methanogenic lake sediments Open
Anaerobic oxidation of methane (AOM) is among the main processes limiting the release of the greenhouse gas methane from natural environments. Geochemical profiles and experiments with fresh sediments from Lake Kinneret (Israel) indicate t…
View article: Aerobic methanotrophic activity stimulates iron reduction in lake sediments&#160;
Aerobic methanotrophic activity stimulates iron reduction in lake sediments  Open
<p>Recent observations from shallow anoxic lacustrine sediments around the world show an unexpected presence of bacterial methanotrophs, usually typified to be aerobic, together with anaerobic microorganisms, such as methanogens and …
View article: Catabolic protein degradation in marine sediments confined to distinct archaea
Catabolic protein degradation in marine sediments confined to distinct archaea Open
Metagenomic analysis has facilitated prediction of a variety of carbon utilization potentials by uncultivated archaea including degradation of protein, which is a wide-spread carbon polymer in marine sediments. However, the activity of det…