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dc.contributor.author
Irvine, Irina C.
dc.contributor.author
Vivanco, Lucía
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dc.contributor.author
Bentley, Peris N.
dc.contributor.author
Martiny, Jennifer B. H.
dc.date.available
2017-05-23T19:46:32Z
dc.date.issued
2012-03
dc.identifier.citation
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; Frontiers; Frontiers in Microbiology; 3; 3-2012; 1-10; 90
dc.identifier.issn
1664-302X
dc.identifier.uri
http://hdl.handle.net/11336/16901
dc.description.abstract
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 (1.23μg CH4 m−2 day−1 for each g N m−2 year−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%, and together by 44%. In contrast, methanotrophy was stimulated by carbon (methane) addition (830%), 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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Frontiers
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Methylotrophy
dc.subject
Methanogenesis
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Methanotrophy
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Methane Flux
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Nitrogen Gradient
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Nutrient Limitation,
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Mxaf
dc.subject
Acetate
dc.subject.classification
Biología Celular, Microbiología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.subject.classification
Ecología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The effect of nitrogen enrichment on C1-cycling microorganisms and methane flux in salt marsh sediments
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-05-22T20:48:15Z
dc.journal.volume
3
dc.journal.pagination
1-10; 90
dc.journal.pais
Suiza
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dc.journal.ciudad
Lausana
dc.description.fil
Fil: Irvine, Irina C.. University of California at Irvine; Estados Unidos. United States National Park Service; Estados Unidos
dc.description.fil
Fil: Vivanco, Lucía. University of California at Irvine; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
dc.description.fil
Fil: Bentley, Peris N.. University of California at Irvine; Estados Unidos
dc.description.fil
Fil: Martiny, Jennifer B. H.. University of California at Irvine; Estados Unidos
dc.journal.title
Frontiers in Microbiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3389/fmicb.2012.00090
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://journal.frontiersin.org/article/10.3389/fmicb.2012.00090/full
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