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dc.contributor.author
Romero Ovalle, Paula Esteli
dc.contributor.author
Bisigato, Alejandro Jorge
dc.contributor.author
Campanella, María Victoria
dc.date.available
2022-03-16T15:57:57Z
dc.date.issued
2021-06
dc.identifier.citation
Romero Ovalle, Paula Esteli; Bisigato, Alejandro Jorge; Campanella, María Victoria; Soil erosion facilitates shrub encroachment in Patagonian herbaceous steppes; John Wiley & Sons Ltd; Land Degradation & Development; 32; 11; 6-2021; 3377-3385
dc.identifier.issn
1085-3278
dc.identifier.uri
http://hdl.handle.net/11336/153449
dc.description.abstract
Previous studies in northeastern Patagonia suggested that, mainly as a consequence of overgrazing by sheep, the herbaceous steppes are being replaced by shrub steppes dominated by Chuquiraga avellanedae as a consequence of shrub encroachment. The herbaceous steppe presents a thick sandy loam to loamy sand A-horizon lying on a clay-horizon while the shrub steppe presents the clay-horizon at or near the soil surface. The thickness reduction of the remaining A-horizon and the formation of desert pavements are evidence of soil erosion. As previous studies suggested that shrub encroachment co-occurs with the erosion of the sandy A-horizon, we hypothesized that shrub encroachment is favored by the presence of an clay-horizon near the soil surface. We expected that C. avellanedae emergence and establishment would be higher as the clay horizon is closer to the soil surface and the A-horizon is reduced. We performed field and greenhouse experiments to evaluate seedling emergence and establishment along a gradient of A-horizon thickness. We found that the presence of a relatively thin sandy layer on the surface had a negative influence on both shrub emergence and establishment. The summer drought was not a critical period for the seedlings. Conversely, the highest seedling mortality took place during late winter in sandy soils, suggesting that these soils are more susceptible to frost heaving than clay soils. In conclusion, soil erosion in the northeastern Patagonian steppes would indirectly facilitate shrub encroachment due to differences in frost heaving susceptibility between sandy and clay soils.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
FROST HEAVING
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PATAGONIA
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SEEDLING SURVIVAL
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SHRUB ENCROACHMENT
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SOIL EROSION
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Ecología
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Soil erosion facilitates shrub encroachment in Patagonian herbaceous steppes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-12-03T19:26:12Z
dc.identifier.eissn
1099-145X
dc.journal.volume
32
dc.journal.number
11
dc.journal.pagination
3377-3385
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Romero Ovalle, Paula Esteli. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina
dc.description.fil
Fil: Bisigato, Alejandro Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
dc.description.fil
Fil: Campanella, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina
dc.journal.title
Land Degradation & Development
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/ldr.4016
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/ldr.4016
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