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dc.contributor.author
Hess, Laura J. T.  
dc.contributor.author
Austin, Amy Theresa  
dc.date.available
2017-10-09T21:06:25Z  
dc.date.issued
2017-01  
dc.identifier.citation
Hess, Laura J. T.; Austin, Amy Theresa; Pine afforestation alters rhizosphere effects and soil nutrient turnover across a precipitation gradient in Patagonia, Argentina; Springer; Plant and Soil; 415; 1-2; 1-2017; 449-464  
dc.identifier.issn
0032-079X  
dc.identifier.uri
http://hdl.handle.net/11336/26295  
dc.description.abstract
Aims: Pine species, when planted outside their native range, can have profound impacts on soil carbon (C) and nitrogen (N) pools, which may be related in part to their association with ectomycorrhizal fungi. We investigated the effects of exotic planting of Pinus ponderosa on C and N cycling in the rhizosphere along a precipitation gradient in Patagonia, Argentina. Methods: We measured C mineralization, microbial biomass-C, and soil enzyme activity in rhizosphere and bulk soil collected from pine plantations and native vegetation. Rhizosphere effects were calculated as the percent difference between paired rhizosphere and bulk soil samples. Results: In afforested sites, we found enhanced rhizosphere effects for C mineralization and microbial biomass relative to native vegetation, but not for enzymatic activity. The absolute values of all evaluated variables were significantly reduced in pine plantations compared to native vegetation. We also observed strong correlations between enzymatic activity, and soil organic matter and microbial biomass. For both pine and native trees species, rhizosphere effects for N-degrading enzymes were positively correlated with precipitation. Conclusions: Pine afforestation reduced overall N turnover and microbial activity in these ecosystems. Our data suggest that these reductions may be driven by reductions in soil organic C pools. Additionally, ecosystem water availability may directly or indirectly regulate the magnitude of rhizosphere effects on N cycling independent of plant species. The negative impacts of afforestation on N cycling should be considered in evaluating the long-term potential for C sequestration in these human modified ecosystems.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Springer  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Afforestation  
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Nitrogen  
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Nothofagus Spp.  
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Patagonia  
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Pine  
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Rhizosphere Effects  
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Soil Enzyme Activity  
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Soil Organic Matter  
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Bioquímica y Biología Molecular  
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Ciencias Biológicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Pine afforestation alters rhizosphere effects and soil nutrient turnover across a precipitation gradient in Patagonia, Argentina  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2017-07-13T18:17:49Z  
dc.identifier.eissn
1573-5036  
dc.journal.volume
415  
dc.journal.number
1-2  
dc.journal.pagination
449-464  
dc.journal.pais
Suiza  
dc.description.fil
Fil: Hess, Laura J. T.. University of Stanford; Estados Unidos  
dc.description.fil
Fil: Austin, Amy Theresa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas; Argentina. 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.journal.title
Plant and Soil  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11104-017-3174-4  
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info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs11104-017-3174-4