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dc.contributor.author
Cipriotti, Pablo Ariel
dc.contributor.author
Aguiar, Martin Roberto
dc.date.available
2017-06-02T19:08:25Z
dc.date.issued
2015-02
dc.identifier.citation
Cipriotti, Pablo Ariel; Aguiar, Martin Roberto; Is the balance between competition and facilitation a driver of the patch dynamics in arid vegetation mosaics?; Wiley; Oikos; 124; 2; 2-2015; 139-149
dc.identifier.issn
0030-1299
dc.identifier.uri
http://hdl.handle.net/11336/17396
dc.description.abstract
In most arid ecosystems, the vegetation is organized into two-phase mosaics, where high-cover vegetation patches are interspersed in a matrix of low plant cover. We studied the role of the biotic interaction balance (competition/facilitation) between shrubs and grasses as a driver of patch dynamics and maintenance of two-phase vegetation mosaics. Following Watt's seminal model, we conducted two field experiments in which we manipulated different vegetation patches to obtain the different stages along the building and degradation dynamics of high-cover patches. In addition we applied two possible belowground competition treatments (natural and experimentally reduced). We measured plant variables (emergence, survival, height, flower culms) on grass seedlings and transplants. We integrated all plant measurements into a single positive and negative component, to calculate the net balance along three stages of the patch dynamics proposed. The net biotic interaction balance was negative during the early and mature stages of high-cover patches because the average standardized effect from the negative component was below −0.44, while the positive component was not different from zero. However, the net biotic interaction balance was positive during the degraded stages of high-cover patches because the negative average component was −0.37, while the positive component reached 0.58. The negative net effects during early and mature stages of high-cover patches can be explained by the occurrence of wet years, because high rainfalls hide the aboveground facilitation. Our findings point out the importance of complementary mechanisms to the interaction balance in the mosaic maintenance (e.g. trapping of seeds by shrubs) according to the inter-annual rainfall variability.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Interaccion Pastos-Arbustos
dc.subject
Reclutamiento de Nuevos Individuos
dc.subject
Mosaico de Vegetacion
dc.subject
Estepa Patagonica
dc.subject.classification
Ecología
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Is the balance between competition and facilitation a driver of the patch dynamics in arid vegetation mosaics?
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-06-02T17:31:41Z
dc.journal.volume
124
dc.journal.number
2
dc.journal.pagination
139-149
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Hoboken
dc.description.fil
Fil: Cipriotti, Pablo Ariel. 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.description.fil
Fil: Aguiar, Martin Roberto. 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
Oikos
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/oik.01758
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/oik.01758/abstract
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