ArticleProceedings of the National Academy of Sciences of the United States of America2014
Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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Who cites it
30 citing papers in PubMed, 211 citations in OpenAlex.
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- Global Role of Vanadium for Cryptogamic Nitrogen Fixation in Extratropical Forests.Environmental science & technology · 2026Article
- Resurrected nitrogenases recapitulate canonical N-isotope biosignatures over two billion years.Nature communications · 2026Article
- Biological, Equilibrium and Photochemical Signatures of C, N and S Isotopes in the Early Earth and Exoplanet Atmospheres.Life (Basel, Switzerland) · 2025Article
- Nitrogen stable isotope fractionation by biological nitrogen fixation reveals cellular nitrogenase is diffusion limited.PNAS nexus · 2025Article
- Exploring the influence of atmospheric COApplied and environmental microbiology · 2024Article
- Expanded subsurface ocean anoxia in the Atlantic during the Paleocene-Eocene Thermal Maximum.Nature communications · 2024Article
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- Mimicking lightning-induced electrochemistry on the early Earth.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Modern analogs for ammonia flux from terrestrial hydrothermal features to the Archean atmosphere.Scientific reports · 2024Article
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- Ferrihydrite-mediated methanotrophic nitrogen fixation in paddy soil under hypoxia.ISME communications · 2024Article
- Subsurface biogeochemical cycling of nitrogen in the actively serpentinizing Samail Ophiolite, Oman.Frontiers in microbiology · 2023Article
- Quantification of biological nitrogen fixation by Mo-independent complementary nitrogenases in environmental samples with low nitrogen fixation activity.Scientific reports · 2022Article
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- Purple sulfur bacteria fix NNature communications · 2021Article
- Large Hydrogen Isotope Fractionation Distinguishes Nitrogenase-Derived Methane from Other Methane Sources.Applied and environmental microbiology · 2020Article
- Reactivity, Mechanism, and Assembly of the Alternative Nitrogenases.Chemical reviews · 2020Review
- Carbon substrate re-orders relative growth of a bacterium using Mo-, V-, or Fe-nitrogenase for nitrogen fixation.Environmental microbiology · 2020Article
- Limited oxygen production in the Mesoarchean ocean.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
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4 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Biological nitrogen fixation constitutes the main input of fixed nitrogen to Earth's ecosystems, and its isotope effect is a key parameter in isotope-based interpretations of the N cycle. The nitrogen isotopic composition (δ(15)N) of newly fixed N is currently believed to be ∼-1‰, based on measurements of organic matter from diazotrophs using molybdenum (Mo)-nitrogenases. We show that the vanadium (V)- and iron (Fe)-only "alternative" nitrogenases produce fixed N with significantly lower δ(15)N (-6 to -7‰). An important contribution of alternative nitrogenases to N2 fixation provides a simple explanation for the anomalously low δ(15)N (<-2‰) in sediments from the Cretaceous Oceanic Anoxic Events and the Archean Eon. A significant role for the alternative nitrogenases over Mo-nitrogenase is also consistent with evidence of Mo scarcity during these geologic periods, suggesting an additional dimension to the coupling between the global cycles of trace elements and nitrogen.
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