Heidi Taubner
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View article: Seasonal biogeochemical variations in a modern microbialite reef under early Earth-like conditions
Seasonal biogeochemical variations in a modern microbialite reef under early Earth-like conditions Open
Microbialites are organosedimentary structures that have existed since the Precambrian and have endured through geological time, serving as archives of Earth’s environmental evolution. Today, they persist in only a few environments markedl…
View article: Depositional controls and budget of organic carbon burial in fine-grained sediments of the North Sea – the Helgoland Mud Area as a natural laboratory
Depositional controls and budget of organic carbon burial in fine-grained sediments of the North Sea – the Helgoland Mud Area as a natural laboratory Open
The burial of organic matter (OM) within fine-grained continental shelf sediments represents one of the major long-term sinks of carbon. We investigated the key factors controlling organic carbon burial in sediments of the North Sea by usi…
View article: Interannual to decadal climate variability during the past 2,000 years in the Western Mediterranean using Mass Spectrometry Imaging
Interannual to decadal climate variability during the past 2,000 years in the Western Mediterranean using Mass Spectrometry Imaging Open
The Mediterranean Sea is expected to be one of the regions most severely impacted by current and future climate change. In fact, it is already experiencing more frequent and severe hydro-extremes (floods and droughts), which are to be exac…
View article: Sediment resuspension in muddy sediments enhances pyrite oxidation and carbon dioxide emissions in Kiel Bight
Sediment resuspension in muddy sediments enhances pyrite oxidation and carbon dioxide emissions in Kiel Bight Open
Sediment resuspension of blue carbon ecosystems (e.g., seagrass beds) and muddy sediments exposes buried particulate organic carbon to oxygenated waters and remineralization, potentially enhancing carbon dioxide fluxes. However, the kineti…
View article: Seasonal biogeochemical variations in a modern microbialite reef under early Earth-like conditions
Seasonal biogeochemical variations in a modern microbialite reef under early Earth-like conditions Open
Microbialites are organosedimentary structures dating to the Precambrian that serve as archives of Earth s environmental evolution. Today, they persist in only a few environments markedly different from those in which they first arose. Her…
View article: Depositional controls and budget of organic carbon burial in fine-grained sediments of the North Sea – the Helgoland Mud Area as a test field
Depositional controls and budget of organic carbon burial in fine-grained sediments of the North Sea – the Helgoland Mud Area as a test field Open
The burial of organic matter (OM) within fine-grained continental shelf sediments represents one of the major long-term sinks of carbon. We investigated the key factors controlling organic carbon burial in sediments of the Helgoland Mud Ar…
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: Two-Dimensional Mapping of Arsenic Concentration and Speciation with Diffusive Equilibrium in Thin-Film Gels
Two-Dimensional Mapping of Arsenic Concentration and Speciation with Diffusive Equilibrium in Thin-Film Gels Open
We present a new approach combining diffusive equilibrium in thin-film gels and spectrophotometric methods to determine the spatial distribution of arsenite, arsenate, and phosphate at submillimeter resolution. The method relies on the sim…
View article: Centennial scale sequences of environmental deterioration preceded the end-Permian mass extinction
Centennial scale sequences of environmental deterioration preceded the end-Permian mass extinction Open
The exact drivers for the end-Permian mass extinction (EPME) remain controversial. Here we focus on a ~10,000 yr record from the marine type section at Meishan, China, preceding and covering the onset of the EPME. Analyses of polyaromatic …
View article: Microplastics and ship paint particles in the Weddell Sea, Southern Ocean: A forensic investigation
Microplastics and ship paint particles in the Weddell Sea, Southern Ocean: A forensic investigation Open
Microplastics (MP) are ubiquitous in the marine environment and have even reached the Southern Ocean surrounding Antarctica. In this study, we investigated the occurrence of microplastics in the Weddell Sea, an Antarctic region experiencin…
View article: Two-dimensional imaging of arsenic concentration and speciation with diffusive equilibrium in thin-film (DET) gels
Two-dimensional imaging of arsenic concentration and speciation with diffusive equilibrium in thin-film (DET) gels Open
<p>Arsenic is common toxic contaminant in soils, but tracking its mobility is difficult because microscale processes govern its speciation and affinity to minerals. We aimed to unravel such dynamics in contaminated soils of Harz broo…
View article: Sulfate-dependent reversibility of intracellular reactions explains the opposing isotope effects in the anaerobic oxidation of methane
Sulfate-dependent reversibility of intracellular reactions explains the opposing isotope effects in the anaerobic oxidation of methane Open
Electron acceptor availability affects the net isotopic fractionation of a global biogeochemical reaction in marine sediments.
View article: Clumped Isotopologue Fractionation by Microbial Cultures Performing the Anaerobic Oxidation of Methane
Clumped Isotopologue Fractionation by Microbial Cultures Performing the Anaerobic Oxidation of Methane Open
Methane is abundant in marine subsurface sediments, sourced from microbial or thermocatalytic products. The relative composition of its isotopologues ( 12 CH 4 , 13 CH 4 , 12 CH 3 D and 13 CH 3 D) is used to infer its sources and sinks. Th…
View article: Clumped Isotopologue Fractionation by Microbial Cultures Performing the Anaerobic Oxidation of Methane
Clumped Isotopologue Fractionation by Microbial Cultures Performing the Anaerobic Oxidation of Methane Open
Methane is abundant in marine subsurface sediments, sourced from microbial or thermocatalytic products. The relative composition of its isotopologues (12CH4, 13CH4, 12CH3D and 13CH3D) is used to infer its sources and sinks. The anaerobic o…
View article: Clumped Isotopologue Fractionation by Microbial Cultures Performing the Anaerobic 10 Oxidation of Methane
Clumped Isotopologue Fractionation by Microbial Cultures Performing the Anaerobic 10 Oxidation of Methane Open
Methane is abundant in marine subsurface sediments, sourced from microbial or thermocatalytic products. The relative composition of its isotopologues (12CH4, 13CH4, 12CH3D and 13CH3D) is used to infer its sources and sinks. The anaerobic o…
View article: Rates and Microbial Players of Iron-Driven Anaerobic Oxidation of Methane in Methanic Marine Sediments
Rates and Microbial Players of Iron-Driven Anaerobic Oxidation of Methane in Methanic Marine Sediments Open
The flux of methane, a potent greenhouse gas, from the seabed is largely controlled by anaerobic oxidation of methane (AOM) coupled to sulfate reduction (S-AOM) in the sulfate methane transition (SMT). S-AOM is estimated to oxidize 90% of …
View article: Pore water and solid phase data of sediment cores from the Helgoland Mud Area, North Sea
Pore water and solid phase data of sediment cores from the Helgoland Mud Area, North Sea Open
Pore water and solid phase concentration in samples collected during RV Heincke expeditions HE406, HE443 and, HE461
View article: Pore water geochemistry of sediment core HE461/04-4
Pore water geochemistry of sediment core HE461/04-4 Open
Methods:\n\nSampling\nRhizon technique (Seeberg-Elverfeldt et al. 2005).\n\nSO42-\nIon chromatography (Metrohm Compact IC 761 )\n\nFe2+\nMeasured using inductively coupled plasma-optical emission spectrometry (Iris Intrepid II ICP-OES).\n\…