The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments

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Fil: Irvine, Irina C. University of California Irvine. Department of Ecology and Evolutionary Biology. Irvine, CA, USA.

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Autores principales: Irvine, Irina C., Vivanco, Lucía, Bentley, Peris N., Martiny, Jennifer B. H.
Formato: article Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2012
Materias:
ACETATE
METHANE FLUX
METHANOGENESIS
METHANOTROPHY
METHYLOTROPHY
MXAF
NITROGEN GRADIENT
NUTRIENT LIMITATION
Acceso en línea:http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2012Irvine
Aporte de:
FAUBA Digital - Facultad de Agronomía (UBA) de Universidad de Buenos Aires
id snrd:2012Irvine
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spelling snrd:2012Irvine2021-10-15T16:56:07Z Irvine, Irina C. Vivanco, Lucía Bentley, Peris N. Martiny, Jennifer B. H. 2012 Fil: Irvine, Irina C. University of California Irvine. Department of Ecology and Evolutionary Biology. Irvine, CA, USA. Fil: Irvine, Irina C. U.S. National Park Service. Santa Monica Mountain National Recreation Area. Division of Planning, Science and Resource Management. Thousand Oaks, CA, USA. Fil: Vivanco, Lucía. University of California Irvine. Department of Ecology and Evolutionary Biology. Irvine, CA, USA. Fil: Vivanco, Lucía. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Vivanco, Lucía. CONICET – Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. Fil: Bentley, Peris N. University of California Irvine. Department of Ecology and Evolutionary Biology. Irvine, CA, USA. Fil: Martiny, Jennifer B. H. University of California Irvine. Department of Ecology and Evolutionary Biology. Irvine, CA, USA. Methane (CH4) flux from ecosystems is driven by C1-cycling microorganisms-the methanogens and the methylotrophs. Little is understood about what regulates these communities, complicating predictions about how global change drivers such as nitrogen enrichment will affect methane cycling. Using a nitrogen addition gradient experiment in three Southern California salt marshes, we show that sediment CH4 flux increased linearly with increasing nitrogen addition (1.23 ug CH4 m-2 day-1 for each gNm-2year-1 applied) after 7 months of fertilization. To test the reason behind this increased CH4 flux, we conducted a microcosm experiment altering both nitrogen and carbon availability under aerobic and anaerobic conditions. Methanogenesis appeared to be both nitrogen and carbon (acetate) limited. N and C each increased methanogenesis by 18 percent, and together by 44 percent. In contrast, methanotrophy was stimulated by carbon (methane) addition (830 percent), but was unchanged by nitrogen addition. Sequence analysis of the sediment methylotroph community with the methanol dehydrogenase gene (mxaF) revealed three distinct clades that fall outside of known lineages. However, in agreement with the microcosm results, methylotroph abundance (assayed by qPCR) and composition (assayed by terminal restriction fragment length polymorphism analysis) did not vary across the experimental nitrogen gradient in the field. Together, these results suggest that nitrogen enrichment to salt marsh sediments increases methane flux by stimulating the methanogen community. tbls., grafs. application/pdf doi:10.3389/fmicb.2012.00090 issn:1664-302X http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2012Irvine eng info:eu-repo/semantics/openAccess openAccess http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4 Frontiers in Microbiology Vol.3 art.90 http://www.frontiersin.org/ ACETATE METHANE FLUX METHANOGENESIS METHANOTROPHY METHYLOTROPHY MXAF NITROGEN GRADIENT NUTRIENT LIMITATION The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments article info:eu-repo/semantics/article info:ar-repo/semantics/artículo publishedVersion info:eu-repo/semantics/publishedVersion
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-140
collection FAUBA Digital - Facultad de Agronomía (UBA)
language Inglés
orig_language_str_mv eng
topic ACETATE
METHANE FLUX
METHANOGENESIS
METHANOTROPHY
METHYLOTROPHY
MXAF
NITROGEN GRADIENT
NUTRIENT LIMITATION
spellingShingle ACETATE
METHANE FLUX
METHANOGENESIS
METHANOTROPHY
METHYLOTROPHY
MXAF
NITROGEN GRADIENT
NUTRIENT LIMITATION
Irvine, Irina C.
Vivanco, Lucía
Bentley, Peris N.
Martiny, Jennifer B. H.
The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
topic_facet ACETATE
METHANE FLUX
METHANOGENESIS
METHANOTROPHY
METHYLOTROPHY
MXAF
NITROGEN GRADIENT
NUTRIENT LIMITATION
description Fil: Irvine, Irina C. University of California Irvine. Department of Ecology and Evolutionary Biology. Irvine, CA, USA.
format article
Artículo
Artículo
publishedVersion
publishedVersion
author Irvine, Irina C.
Vivanco, Lucía
Bentley, Peris N.
Martiny, Jennifer B. H.
author_facet Irvine, Irina C.
Vivanco, Lucía
Bentley, Peris N.
Martiny, Jennifer B. H.
author_sort Irvine, Irina C.
title The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
title_short The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
title_full The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
title_fullStr The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
title_full_unstemmed The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
title_sort effect of nitrogen enrichment on c1-cycling microorganisms and methane flux in salt marsh sediments
publishDate 2012
url http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2012Irvine
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