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dc.contributor.author
Harris, Wylie N.
dc.contributor.author
Moretto, Alicia Susana
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dc.contributor.author
Distel, Roberto Alejandro
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dc.contributor.author
Boutton, Thomas W.
dc.contributor.author
Bóo, Roberto M.
dc.date.available
2017-07-14T18:18:06Z
dc.date.issued
2007-09
dc.identifier.citation
Harris, Wylie N.; Moretto, Alicia Susana; Distel, Roberto Alejandro; Boutton, Thomas W.; Bóo, Roberto M.; Fire and grazing in the Caldenal of Argentina: Effects on plant and soil carbon and nitrogen; Elsevier Masson; Acta Oecologica; 32; 2; 9-2007; 207-214
dc.identifier.issn
1146-609X
dc.identifier.uri
http://hdl.handle.net/11336/20641
dc.description.abstract
Fire and grazing can modulate feedbacks between pools of carbon and nitrogen of plant and soil, altering cycles of these elements in grassland ecosystems. The magnitude of these effects may be limited by climate and by limited plasticity in tissue chemistry within a given photosynthetic pathway. We tested the hypotheses that (1) fire reduces rates of C and N cycling, while grazing increases them, and (2) these changes are due to intraspecific changes in plant tissue chemistry rather than competitive replacements by species with differing tissue chemistry. Plant and soil C and N content and isotopic ratios, soil microbial biomass C, and potential C mineralization were measured in areas of the southern Caldenal region of central Argentina with known histories of fire and grazing. Results support the hypothesis that fire reduces rates of N cycling via intraspecific increases in plant tissue C/N. Contrary to our first hypothesis, grazing also reduced plant tissue N. Fire and grazing effects on plant tissue chemistry resulted primarily from changes in dynamics of soil inorganic N. These changes were due to intraspecific changes in plant tissue chemistry, which was in agreement with our second hypothesis. Potential C mineralization experiments revealed little difference between treatments in pool sizes and mean residence times of labile soil organic carbon. Livestock grazing and fire have significant influences on soil N dynamics, particularly as mediated by soil microbes, in managed grasslands of the southern Caldenal in Argentina
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Masson
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Fire
dc.subject
Grazing
dc.subject
Carbon
dc.subject
Nitrogen
dc.subject.classification
Otras Ciencias Agrícolas
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dc.subject.classification
Otras Ciencias Agrícolas
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.subject.classification
Otras Ciencias Agrícolas
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dc.subject.classification
Otras Ciencias Agrícolas
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Fire and grazing in the Caldenal of Argentina: Effects on plant and soil carbon and nitrogen
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-07-12T18:15:58Z
dc.journal.volume
32
dc.journal.number
2
dc.journal.pagination
207-214
dc.journal.pais
Francia
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dc.description.fil
Fil: Harris, Wylie N.. Texas A&M University; Estados Unidos
dc.description.fil
Fil: Moretto, Alicia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Distel, Roberto Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Centro de Recursos Naturales Renovables de la Zona Semiarida. Universidad Nacional del Sur. Centro de Recursos Naturales Renovables de la Zona Semiarida; Argentina
dc.description.fil
Fil: Boutton, Thomas W.. Texas A&M University; Estados Unidos
dc.description.fil
Fil: Bóo, Roberto M.. Universidad Nacional del Sur. Departamento de Agronomía; Argentina
dc.journal.title
Acta Oecologica
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.actao.2007.05.001
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1146609X07000665
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