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dc.contributor.author
Peri, Pablo Luis
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dc.contributor.author
Duarte Guardia, Sandra
dc.contributor.author
Amelung, Wulf
dc.contributor.author
Ladd, Brenton
dc.date.available
2023-02-06T17:36:36Z
dc.date.issued
2022-03
dc.identifier.citation
Peri, Pablo Luis; Duarte Guardia, Sandra; Amelung, Wulf; Ladd, Brenton; Precipitation is the key determinant of topsoil δ15N values in southern Patagonia's semiarid rangelands; Soil Science Society of America; Vadose Zone Journal; 21; 2; 3-2022; 1-8
dc.identifier.issn
1539-1663
dc.identifier.uri
http://hdl.handle.net/11336/187043
dc.description.abstract
Nitrogen (N) cycling in rangeland soils could potentially be controlled by water supply, stocking rates, or a range of other variables, such as ecosystem N stocks. To gauge the relative importance and elucidate possible interactions among these factors, we measured many abiotic variables to identify first-order controls of δ15N for Patagonia's rangeland soils under contrasting historical grazing intensities. The results showed that δ15N values declined as water availability increased. The effects of precipitation and stocking rate on soil δ15N values were additive, and the effect of precipitation far outweighed the effects of grazing pressure. The soil N stock was a weak predictive variable for modeling variation in δ15N of the soil. Earlier assumptions about an inflection point for N cycling and δ15N values related to aridity were not confirmed. We conclude that variation in water availability drives variation in δ15N values irrespective of grazing intensity. We also conclude that meaningful interpretation of δ15N in soil will require a better mechanistic understanding of the interactions between water and N in the vadose zone than we currently possess.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Soil Science Society of America
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
water
dc.subject
nitrogen isotope
dc.subject
grasslands
dc.subject
grazing
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
Precipitation is the key determinant of topsoil δ15N values in southern Patagonia's semiarid rangelands
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-02-06T10:17:04Z
dc.journal.volume
21
dc.journal.number
2
dc.journal.pagination
1-8
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Wisconsin
dc.description.fil
Fil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria; Argentina. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Duarte Guardia, Sandra. Universidad Nacional de la Patagonia Austral; Argentina. Instituto Nacional de Innovación Agraria; Perú
dc.description.fil
Fil: Amelung, Wulf. Institute of Crop Science and Resource Conservation; Alemania
dc.description.fil
Fil: Ladd, Brenton. Universidad Cientifica del Sur; Perú
dc.journal.title
Vadose Zone Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/vzj2.20183
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