N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment

Abstract Nitrous oxide (N2O) is a potent greenhouse gas that also contributes to stratospheric ozone depletion. Besides microbial denitrification, abiotic nitrite reduction by Fe(II) (chemodenitrification) has the potential to be an important source of N2O. Here, using microcosms, we quantified N2O...

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Autores principales:	Julia M. Otte, Nia Blackwell, Reiner Ruser, Andreas Kappler, Sara Kleindienst, Caroline Schmidt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d9f62ed7b35d4ec3ba0b4d9779d30a33
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spelling	oai:doaj.org-article:d9f62ed7b35d4ec3ba0b4d9779d30a332021-12-02T15:08:58ZN2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment10.1038/s41598-019-47172-x2045-2322https://doaj.org/article/d9f62ed7b35d4ec3ba0b4d9779d30a332019-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-47172-xhttps://doaj.org/toc/2045-2322Abstract Nitrous oxide (N2O) is a potent greenhouse gas that also contributes to stratospheric ozone depletion. Besides microbial denitrification, abiotic nitrite reduction by Fe(II) (chemodenitrification) has the potential to be an important source of N2O. Here, using microcosms, we quantified N2O formation in coastal marine sediments under typical summer temperatures. Comparison between gamma-radiated and microbially-active microcosm experiments revealed that at least 15–25% of total N2O formation was caused by chemodenitrification, whereas 75–85% of total N2O was potentially produced by microbial N-transformation processes. An increase in (chemo)denitrification-based N2O formation and associated Fe(II) oxidation caused an upregulation of N2O reductase (typical nosZ) genes and a distinct community shift to potential Fe(III)-reducers (Arcobacter), Fe(II)-oxidizers (Sulfurimonas), and nitrate/nitrite-reducing microorganisms (Marinobacter). Our study suggests that chemodenitrification contributes substantially to N2O formation from marine sediments and significantly influences the N- and Fe-cycling microbial community.Julia M. OtteNia BlackwellReiner RuserAndreas KapplerSara KleindienstCaroline SchmidtNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-12 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Julia M. Otte Nia Blackwell Reiner Ruser Andreas Kappler Sara Kleindienst Caroline Schmidt N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment
description	Abstract Nitrous oxide (N2O) is a potent greenhouse gas that also contributes to stratospheric ozone depletion. Besides microbial denitrification, abiotic nitrite reduction by Fe(II) (chemodenitrification) has the potential to be an important source of N2O. Here, using microcosms, we quantified N2O formation in coastal marine sediments under typical summer temperatures. Comparison between gamma-radiated and microbially-active microcosm experiments revealed that at least 15–25% of total N2O formation was caused by chemodenitrification, whereas 75–85% of total N2O was potentially produced by microbial N-transformation processes. An increase in (chemo)denitrification-based N2O formation and associated Fe(II) oxidation caused an upregulation of N2O reductase (typical nosZ) genes and a distinct community shift to potential Fe(III)-reducers (Arcobacter), Fe(II)-oxidizers (Sulfurimonas), and nitrate/nitrite-reducing microorganisms (Marinobacter). Our study suggests that chemodenitrification contributes substantially to N2O formation from marine sediments and significantly influences the N- and Fe-cycling microbial community.
format	article
author	Julia M. Otte Nia Blackwell Reiner Ruser Andreas Kappler Sara Kleindienst Caroline Schmidt
author_facet	Julia M. Otte Nia Blackwell Reiner Ruser Andreas Kappler Sara Kleindienst Caroline Schmidt
author_sort	Julia M. Otte
title	N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment
title_short	N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment
title_full	N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment
title_fullStr	N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment
title_full_unstemmed	N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment
title_sort	n2o formation by nitrite-induced (chemo)denitrification in coastal marine sediment
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/d9f62ed7b35d4ec3ba0b4d9779d30a33
work_keys_str_mv	AT juliamotte n2oformationbynitriteinducedchemodenitrificationincoastalmarinesediment AT niablackwell n2oformationbynitriteinducedchemodenitrificationincoastalmarinesediment AT reinerruser n2oformationbynitriteinducedchemodenitrificationincoastalmarinesediment AT andreaskappler n2oformationbynitriteinducedchemodenitrificationincoastalmarinesediment AT sarakleindienst n2oformationbynitriteinducedchemodenitrificationincoastalmarinesediment AT carolineschmidt n2oformationbynitriteinducedchemodenitrificationincoastalmarinesediment
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N2O formation by nitrite-induced (chemo)denitrification in coastal marine sediment

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