ArticleThe ISME journal2015
Aerobic and anaerobic nitrogen transformation processes in N2-fixing cyanobacterial aggregates.
Article in The ISME journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers.
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Who cites it
58 citing papers in PubMed.
- Microbially enhanced dissolution of calcite in sinking marine particles.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Photoholes within cyanobacterial mats can account for the origin of anammox bacteria and ancient nitrogen loss.Nature ecology & evolution · 2026Article
- Assimilatory NFrontiers in microbiology · 2026Article
- Niche adaptation of particle-associated ammonia-oxidizing archaea sustains nitrification under marine deoxygenation.Frontiers in microbiology · 2026Article
- Article
- Abundant and metabolically flexible bacterial lineages underlie a vast potential for rubisco-mediated carbon fixation in the dark ocean.Genome biology · 2025Article
- Interspecies hydrogen transfer between cyanobacteria and symbiotic bacteria drives nitrogen loss.Nature communications · 2025Article
- Particle-associated NScience advances · 2025Article
- Characterizing nitrogen cycling microorganisms and genes in sediments of the Three Gorges Reservoir.PloS one · 2025Article
- Impact of host species on assembly, composition, and functional profiles of phycosphere microbiomes.mSystems · 2024Article
- Phagotrophy in the nitrogen-fixing haptophyte Braarudosphaera bigelowii.Environmental microbiology reports · 2024Article
- RotoBOD─Quantifying Oxygen Consumption by Suspended Particles and Organisms.Environmental science & technology · 2024Article
- Soil metagenomics reveals the effect of nitrogen on soil microbial communities and nitrogen-cycle functional genes in the rhizosphere ofFrontiers in plant science · 2024Article
- Size fractionation informs microbial community composition and interactions in the eastern tropical North Pacific Ocean.FEMS microbes · 2024Article
- Particle-associated denitrification is the primary source of NNature communications · 2023Article
- Substrate Specificity of Biofilms Proximate to Historic Shipwrecks.Microorganisms · 2023Article
- A mutant fitness assay identifies bacterial interactions in a model ocean hot spot.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Microscale dynamics promote segregated denitrification in diatom aggregates sinking slowly in bulk oxygenated seawater.Communications earth & environment · 2023Article
- Cell-specific measurements show nitrogen fixation by particle-attached putative non-cyanobacterial diazotrophs in the North Pacific Subtropical Gyre.Nature communications · 2022Article
- Periphytic biofilms-mediated microbial interactions and their impact on the nitrogen cycle in rice paddies.Eco-Environment & Health · 2022Review
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Colonies of N(2)-fixing cyanobacteria are key players in supplying new nitrogen to the ocean, but the biological fate of this fixed nitrogen remains poorly constrained. Here, we report on aerobic and anaerobic microbial nitrogen transformation processes that co-occur within millimetre-sized cyanobacterial aggregates (Nodularia spumigena) collected in aerated surface waters in the Baltic Sea. Microelectrode profiles showed steep oxygen gradients inside the aggregates and the potential for nitrous oxide production in the aggregates' anoxic centres. (15)N-isotope labelling experiments and nutrient analyses revealed that N(2) fixation, ammonification, nitrification, nitrate reduction to ammonium, denitrification and possibly anaerobic ammonium oxidation (anammox) can co-occur within these consortia. Thus, N. spumigena aggregates are potential sites of nitrogen gain, recycling and loss. Rates of nitrate reduction to ammonium and N(2) were limited by low internal nitrification rates and low concentrations of nitrate in the ambient water. Presumably, patterns of N-transformation processes similar to those observed in this study arise also in other phytoplankton colonies, marine snow and fecal pellets. Anoxic microniches, as a pre-condition for anaerobic nitrogen transformations, may occur within large aggregates (⩾1 mm) even when suspended in fully oxygenated waters, whereas anoxia in small aggregates (<1 to ⩾0.1 mm) may only arise in low-oxygenated waters (⩽25 μM). We propose that the net effect of aggregates on nitrogen loss is negligible in NO(3)(-)-depleted, fully oxygenated (surface) waters. In NO(3)(-)-enriched (>1.5 μM), O(2)-depleted water layers, for example, in the chemocline of the Baltic Sea or the oceanic mesopelagic zone, aggregates may promote N-recycling and -loss processes.
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