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dc.contributor.author
Sala, Osvaldo Esteban
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dc.contributor.author
Golluscio, Rodolfo
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dc.contributor.author
Lauenroth, W. K.
dc.contributor.author
Roset, P. A.
dc.date.available
2017-05-23T20:08:58Z
dc.date.issued
2012-07
dc.identifier.citation
Sala, Osvaldo Esteban; Golluscio, Rodolfo; Lauenroth, W. K.; Roset, P. A.; Contrasting nutrient-capture strategies in shrubs and grasses of a Patagonian arid ecosystem; Elsevier; Journal Of Arid Environments; 82; 7-2012; 130-135
dc.identifier.issn
0140-1963
dc.identifier.uri
http://hdl.handle.net/11336/16907
dc.description.abstract
Shallow-rooted grasses and deep-rooted shrubs dominate arid ecosystems where nitrogen is concentrated in the upper layers of the soil and water is distributed throughout. Analysis of mineral nitrogen and absorption patterns using a tracer indicated that shrubs in Patagonia absorbed nutrients from the lower, relatively nutrient-poor layers of the soil. Are they, consequently, at a competitive disadvantage with grasses that have the opposite pattern? Studies of nitrogen economy indicated that shrub and grass species have similar N-use efficiency but that they achieve it through opposite mechanisms. Shrubs have a conservative N economy absorbing annually only small fraction of their N content, whereas grasses have a more open N economy. This study about N-capture strategies in conjunction with previous studies about water-use by shrubs and grasses in the Patagonian Steppe suggest a coupling of N and watercapture strategies. Our findings have implications for the response of arid and semiarid ecosystems to global warming, nitrogen deposition, and biodiversity change. For example, climate change scenarios predict, for most arid regions, decreases in moisture availability that will result in a reduction in deep water, which in turn will reduce shrub density and result in a less conservative nitrogen economy.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Arid Ecosystems
dc.subject
Grass-Shrub Competition
dc.subject
Nitrogen Cycling
dc.subject
Water-Nitrogen Interactions
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
Contrasting nutrient-capture strategies in shrubs and grasses of a Patagonian arid ecosystem
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-05-22T20:47:44Z
dc.journal.volume
82
dc.journal.pagination
130-135
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Sala, Osvaldo Esteban. Arizona State University; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Golluscio, Rodolfo. Universidad de Buenos Aires. Facultad de Agronomia; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Lauenroth, W. K.. University of Wyoming; Estados Unidos
dc.description.fil
Fil: Roset, P. A.. Universidad de Buenos Aires. Facultad de Agronomia; Argentina
dc.journal.title
Journal Of Arid Environments
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jaridenv.2012.02.015
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S014019631200095X
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