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Abstract
Decomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ecosystems. The aim of this work was to study root decomposition and nutrient release from fine roots of grasses and trees (Nothofagus antarctica) across a range of Patagonian ecosystems that included steppe, primary forest and silvopastoral [ver mas...]
dc.contributor.authorGargaglione, Veronica Beatriz
dc.contributor.authorBahamonde, Héctor Alejandro
dc.contributor.authorPeri, Pablo Luis
dc.date.accessioned2018-11-21T13:54:43Z
dc.date.available2018-11-21T13:54:43Z
dc.date.issued2018-10-25
dc.identifier.issn1442-9985
dc.identifier.issn1442-9993
dc.identifier.otherhttps://doi.org/10.1111/aec.12672
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/abs/10.1111/aec.12672
dc.identifier.urihttp://hdl.handle.net/20.500.12123/3937
dc.description.abstractDecomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ecosystems. The aim of this work was to study root decomposition and nutrient release from fine roots of grasses and trees (Nothofagus antarctica) across a range of Patagonian ecosystems that included steppe, primary forest and silvopastoral forests. After 2.2 years of decomposition in the field all roots retained 70–90% of their original mass, and decomposition rates were 0.09 and 0.15 year−1 for grass roots in steppe and primary forest, respectively. For N. antarctica roots, no significant differences were found in rates of decay between primary and silvopastoral forests (k = 0.07 year−1). Possibly low temperatures of these southern sites restricted decomposition by microorganisms. Nutrient release differed between sites and root types. Across all ecosystem categories, nitrogen (N) retention in decomposing biomass followed the order: tree roots > roots of forest grasses > roots of steppe grasses. Phosphorus (P) was retained in grass roots in forest plots but was released during decomposition of tree and steppe grass roots. Calcium (Ca) dynamics also was different between root types, since trees showed retention during the initial phase, whereas grass roots showed a slow and consistent Ca release during decomposition. Potassium (K) was the only nutrient that was rapidly released from both grass and tree roots in both grasslands and woodlands. We found that silvopastoral use of N. antarctica forests does not affect grass or tree root decomposition and/or nutrient release, since no significant differences were found for any nutrient according to ecosystem type. Information about tree and grass root decomposition found in this work could be useful to understand C and nutrient cycling in these southern ecosystems, which are characterized by extreme climatic conditions.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherWileyes_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceAustral Ecology First published: 25 October 2018es_AR
dc.subjectNothofaguses_AR
dc.subjectEcosistemaes_AR
dc.subjectEcosystemseng
dc.subjectCarbonoes_AR
dc.subjectCarboneng
dc.subjectMedio Ambientees_AR
dc.subjectEnvironmenteng
dc.subjectRaíceses_AR
dc.subjectRootseng
dc.subjectDegradaciónes_AR
dc.subjectDegradationeng
dc.subjectFertilidad del Sueloes_AR
dc.subjectSoil Fertilityeng
dc.subject.otherRegión Patagónicaes_AR
dc.subject.otherContenido de Nutrientes (Suelo)es_AR
dc.titleDecomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagoniaes_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 Santa Cruzes_AR
dc.description.filFil: Gargaglione, Veronica Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentinaes_AR
dc.description.filFil: Bahamonde, Héctor Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentinaes_AR
dc.description.filFil: Peri, Pablo Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentina. Universidad Nacional de la Patagonia Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentinaes_AR
dc.subtypecientifico


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