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Abstract
We explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously detected. In the first experiment we demonstrated that the preferred scarce grass Bromus pictus has typical traits of Competitive species, while the dominant less preferred Pappostipa speciosa has typical traits of Stress tolerant [ver mas...]
dc.contributor.authorGarcia Martinez, Guillermo Carlos
dc.contributor.authorGolluscio, Rodolfo Angel
dc.date.accessioned2021-03-16T14:36:35Z
dc.date.available2021-03-16T14:36:35Z
dc.date.issued2021-03-09
dc.identifier.issn0140-1963
dc.identifier.otherhttps://doi.org/10.1016/j.jaridenv.2021.104480
dc.identifier.urihttp://hdl.handle.net/20.500.12123/8903
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S014019632100046X
dc.description.abstractWe explored the effect of N addition and adult canopy competition on the recruitment of lost preferred species in the Patagonian steppe, where a decelerated N cycling scenario (sensu Ritchie et al., 1998) had been previously detected. In the first experiment we demonstrated that the preferred scarce grass Bromus pictus has typical traits of Competitive species, while the dominant less preferred Pappostipa speciosa has typical traits of Stress tolerant species (sensu Grime, 1997): B. pictus showed higher maximum Relative Growth Rate, water consumption and competitive ability than P. speciosa. In the second experiment, we proved that without N addition, seedlings of the preferred species showed its maximum survival rate under moderate grazing, where adult competition is lower than under ungrazed conditions and N-limitation is lower than under intense grazing. Instead, with N addition, the survival rate of B. pictus was maximum under intense grazing, where N limitation is maximum and adult competition is minimum. These results suggest that in degraded systems subjected to a decelerating N cycling scenario, the revegetation with preferred species would require recovering soil N levels, and would be more successful in the most degraded sites, where the remnant canopy has low cover.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceJournal of Arid Environments 189 : 104480 (2021)es_AR
dc.subjectDesertificaciónes_AR
dc.subjectDesertificationeng
dc.subjectRestauraciónes_AR
dc.subjectRestorationeng
dc.subjectNitrógenoes_AR
dc.subjectNitrogeneng
dc.subjectPlantas para Recuperación del Sueloes_AR
dc.subjectSoil Reclamation Plantseng
dc.subjectPastoreoes_AR
dc.subjectGrazingeng
dc.subject.otherRegión Patagónicaes_AR
dc.titleGrass recruitment constraints along a grazing gradient in Patagonia: N-limitation x adult competition trade-offes_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Esqueles_AR
dc.description.filFil: García Martínez, Guillermo Carlos. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agroforestal Esquel; Argentinaes_AR
dc.description.filFil: Golluscio, Rodolfo. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Forrajicultura; Argentinaes_AR
dc.description.filFil: Golluscio, Rodolfo. Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentinaes_AR
dc.subtypecientifico


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