Daniela Tienken

Vitamin B 6 Catabolites Act as Interkingdom Signals Within the Marine Microbiome

Michael A. Ochsenkühn, Amin R. Mohamed, Lisa S.Y. Coe, Cong Fei et autres

Abstract More than half of all net primary productivity in the oceans is exchanged and recycled among marine microbial communities, through a network of complex interactions that fuel the global carbon cycle and control oceanic biogeochemistry 1,2 . Cryptic chemical signals control …

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Rhizobia–diatom symbiosis fixes missing nitrogen in the ocean

Bernhard Tschitschko, Mertcan Esti, Miriam Philippi, Abiel T. Kidane et autres

Abstract Nitrogen (N 2 ) fixation in oligotrophic surface waters is the main source of new nitrogen to the ocean 1 and has a key role in fuelling the biological carbon pump 2 . Oceanic N 2 fixation has been attributed almost …

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Correction: The rate and fate of N2 and C fixation by marine diatom-diazotroph symbioses

Rachel Ann Foster, Daniela Tienken, Sten Littmann, Martin John Whitehouse et autres

Authors and Affiliations Department of Ocean Sciences, University of California, Santa Cruz, CA, USA Rachel A. Foster Department of Biogeochemistry, Max Planck Institute for Marine Microbiology, Bremen, Germany Rachel A. Foster, Daniela Tienken, Sten Littmann & Marcel M. M. Kuypers Department of …

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The rate and fate of N2 and C fixation by marine diatom-diazotroph symbioses

Rachel Ann Foster, Daniela Tienken, Sten Littmann, Martin John Whitehouse et autres

Abstract N2 fixation constitutes an important new nitrogen source in the open sea. One group of filamentous N2 fixing cyanobacteria (Richelia intracellularis, hereafter Richelia) form symbiosis with a few genera of diatoms. High rates of N2 fixation and carbon (C) fixation have …

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Assigning Function to Phylogeny: FISH-nanoSIMS

Katharina Kitzinger, Daniela Tienken, Sten Littmann, Abiel T. Kidane et autres

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Crystalline iron oxides stimulate methanogenic benzoate degradation in marine sediment-derived enrichment cultures

David A. Aromokeye, Oluwatobi Emmanuel Oni, Jan Tebben, Xiuran Yin et autres

Abstract Elevated dissolved iron concentrations in the methanic zone are typical geochemical signatures of rapidly accumulating marine sediments. These sediments are often characterized by co-burial of iron oxides with recalcitrant aromatic organic matter of terrigenous origin. Thus far, iron oxides are predicted …

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An intracellular silver deposition method for targeted detection and chemical analysis of uncultured microorganisms

Jasmine Sofia Berg, Alexander Khachikyan, Daniela Tienken, Sten Littmann et autres

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Untangling hidden nutrient dynamics: rapid ammonium cycling and single-cell ammonium assimilation in marine plankton communities

Isabell Klawonn, Stefano Bonaglia, Martin John Whitehouse, Sten Littmann et autres

Abstract Ammonium is a central nutrient in aquatic systems. Yet, cell-specific ammonium assimilation among diverse functional plankton is poorly documented in field communities. Combining stable-isotope incubations (15N-ammonium, 15N2 and 13C-bicarbonate) with secondary-ion mass spectrometry, we quantified bulk ammonium dynamics, N2-fixation and carbon …

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Bloom of a denitrifying methanotroph, ‘ Candidatus Methylomirabilis limnetica’, in a deep stratified lake

Jon S. Graf, Magdalena J. Mayr, Hannah K. Marchant, Daniela Tienken et autres

Summary Methanotrophic bacteria represent an important biological filter regulating methane emissions into the atmosphere. Planktonic methanotrophic communities in freshwater lakes are typically dominated by aerobic gamma‐proteobacteria, with a contribution from alpha‐proteobacterial methanotrophs and the NC10 bacteria. The NC10 clade encompasses methanotrophs related …

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Crenothrix are major methane consumers in stratified lakes

Kirsten Oswald, Jon S. Graf, Sten Littmann, Daniela Tienken et autres

Abstract Methane-oxidizing bacteria represent a major biological sink for methane and are thus Earth’s natural protection against this potent greenhouse gas. Here we show that in two stratified freshwater lakes a substantial part of upward-diffusing methane was oxidized by filamentous gamma-proteobacteria related …

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