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resumen

Resumen
Our study aims to determine the dynamic that led to the spread of exotic Salicaceae on the Limay River floodplain and its implications in shaping the current neoecosystem. We used images obtained by the HRG sensor on board the SPOT-5 satellite. We selected two images dates allowed a comparison of the floodplain under different flooding regimes programmed by the Interjuridiccional Basin Authority, at a rate of 1290 m3/s in Spring and a flow rate of less [ver mas...]
dc.contributor.authorDatri, Leonardo Ariel
dc.contributor.authorFaggi, Ana Maria
dc.contributor.authorGallo, Leonardo Ariel
dc.contributor.authorCarmona, Facundo
dc.date.accessioned2018-12-12T17:27:26Z
dc.date.available2018-12-12T17:27:26Z
dc.date.issued2016-06
dc.identifier.issn1387-3547
dc.identifier.issn1573-1464
dc.identifier.otherhttps://doi.org/10.1007/s10530-016-1114-5
dc.identifier.urihttps://link.springer.com/article/10.1007/s10530-016-1114-5
dc.identifier.urihttp://hdl.handle.net/20.500.12123/4066
dc.description.abstractOur study aims to determine the dynamic that led to the spread of exotic Salicaceae on the Limay River floodplain and its implications in shaping the current neoecosystem. We used images obtained by the HRG sensor on board the SPOT-5 satellite. We selected two images dates allowed a comparison of the floodplain under different flooding regimes programmed by the Interjuridiccional Basin Authority, at a rate of 1290 m3/s in Spring and a flow rate of less than 400 m3/s in Summer. To characterize the vegetation cover, the Normalized Difference Vegetation Index (NDVI) was used to compare images of September and December, also the Normalized Difference Water Index (NDWI) was applied to delineate the riverbed and floodplain in September. To evaluate the influence of flooding regime on the detected patches a Principal Component Analysis (PCA), was performed; and biotic and abiotic factors on the composition of the dominant tree species in each patch by Multiple Factor Analysis (MFA) were analized. A 58.4 % coverage of forest patches had developed on the Limay River floodplain. Patches of older trees grew on surfaces at 1.5 m above the water level. However, the surfaces not reached by floods >1.5 m have a very low rocky coverage (1 %). The analysis of the age of the trees downstream of the dam system showed that the vegetation, often exposed to high floods before the dams were built (1971), was composed of the native willow (Salix humboldtiana) and the exotic Salix alba. As the river regime was attenuated and extraordinary floods disappeared with the operation of the dam Arroyito in 1980, the first patches of Populus nigra spread.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherSpringeres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceBiological Invasions 18 (6) : 1713–1722 (June 2016)es_AR
dc.subjectLlanura Aluviales_AR
dc.subjectFloodplainseng
dc.subjectPaisajees_AR
dc.subjectLandscapeeng
dc.subjectEcosistemaes_AR
dc.subjectEcosystemseng
dc.subjectSalicaceaees_AR
dc.subject.otherRegión Patagónicaes_AR
dc.subject.otherRío Limayes_AR
dc.titleHalf a century of changes in the riverine landscape of Limay River: the origin of a riparian neoecosystem in Patagonia (Argentina)es_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 Barilochees_AR
dc.description.filFil: Datri, Leonardo Ariel. Universidad Nacional del Comahue. Facultad de Ciencias del Ambiente y la Salud.Laboratorio de Investigaciones Ecológicas de la Norpatagonia; Argentinaes_AR
dc.description.filFil: Faggi, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina. Universidad de Flores; Argentinaes_AR
dc.description.filFil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentinaes_AR
dc.description.filFil: Carmona, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Hidrología de Llanuras Dr. Eduardo J. Usunoff; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires; Argentinaes_AR
dc.subtypecientifico


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