$Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia$

Nitrogen isotope fractionation by alternative nitrogenases and past ocean anoxia

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 ¹⁵N) of newly fixed N is currently believed to be ∼–1‰, based on measuremen...

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Veröffentlicht in:	Proceedings of the National Academy of Sciences - PNAS 2014-04, Vol.111 (13), p.4782-4787
Hauptverfasser:	Zhang, Xinning, Sigman, Daniel M., Morel, François M. M., Kraepiel, Anne M. L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Anaerobiosis Bacteria - enzymology Bacteria - growth & development Biological Sciences Biomass Chemical Fractionation ecosystems Euxinia Fractionation Geologic Sediments - chemistry iron Isotope effects isotope fractionation Isotopes Metals - metabolism molybdenum Nitrates Nitrogen Nitrogen Fixation Nitrogen Isotopes nitrogen-fixing bacteria Nitrogenase - metabolism Oceans Oceans and Seas organic matter Physical Sciences Quaternary ammonium compounds Sea water Sediments stable isotopes vanadium
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