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Abstract
Although volcanism may be perceived by the society as a phenomenon with mostly negative consequences, this is not always the case especially for natural systems. There is a limited knowledge on how the deposited pristine ash becomes immobilized and stabilized in the soil after the volcanic event. Here, we studied processes of soil aggregates formation in the buried ash layer in an early stage of the succession as well as the influence of the biological [ver mas...]
dc.contributor.authorEnriquez, Andrea Soledad
dc.contributor.authorNecpalova, Magdalena
dc.contributor.authorCremona, Maria Victoria
dc.contributor.authorPeri, Pablo Luis
dc.contributor.authorSix, Johan
dc.date.accessioned2021-04-12T15:45:11Z
dc.date.available2021-04-12T15:45:11Z
dc.date.issued2021-06-15
dc.identifier.issn0016-7061
dc.identifier.otherhttps://doi.org/10.1016/j.geoderma.2021.114987
dc.identifier.urihttp://hdl.handle.net/20.500.12123/9065
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S0016706121000616
dc.description.abstractAlthough volcanism may be perceived by the society as a phenomenon with mostly negative consequences, this is not always the case especially for natural systems. There is a limited knowledge on how the deposited pristine ash becomes immobilized and stabilized in the soil after the volcanic event. Here, we studied processes of soil aggregates formation in the buried ash layer in an early stage of the succession as well as the influence of the biological legacy (previous land management history) on these processes after the 2011 volcanic event of the Puyehue–Cord´on Caulle Volcanic Complex. 5.5 years after the eruption we collected soil cores to a 10 cm depth in wet and mesic meadows with good and poor grassland conditions induced by light and heavy grazing intensity, respectively, in the East semiarid region of North Patagonia, Argentina. The ash layer was observed down to 5 cm from the soil surface, clearly differentiating a newly developed soil layer formed after the volcanic event. Accordingly, the top 5 cm were examined for the distribution of different size fractions of water-stable soil aggregates and their associated organic carbon (C) and total nitrogen (N) contents. We detected signs of physical and physicochemical changes in respect to the pristine ash collected at these sites in 2011. Soil neoformation processes were detected through the presence of large (4%) and small (21%) macroaggregates, although microaggregates (~45%) and silt + clay fractions (~29%) dominated the soil mass (ash-soil matrix: 0–5 cm depth). C and N contents decreased in a sequence: large macroaggregates ≥ small macroaggregates > microaggregates ≥ silt + clay, highlighting the importance of soil organic matter in the formation of larger-size aggregates and their quality (C and N contents). Biological legacy influenced soil aggregate formation and their quality, as reflected by a higher mass of small macroaggregates and a lower mass of microaggregates (only in mesic meadows) and by higher C and N contents under good grassland conditions. The seasonal hydrological conditions of meadow soils (i.e., soil water content, wetting and drying cycles) via effects on biological and physical processes likely resulted in a reduced aggregation in wet meadows. We noticed an incipient but present soil aggregation processes in these semiarid wetlands translated in the immobilization and stabilization of the buried ashes in the soil. The total C content in the new 0–5 cm soil layer increased at a rate of 1.0 Mg C ha 1 yr 1, on average. This indicates a functional recovery of the ecosystem along with a substantial CO2 mitigation potential in the ashes stabilized with soil organic matter, which might partially counterbalance CO2 emitted during the eruption.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.relationinfo:eu-repograntAgreement/INTA/PNSUELO-1134042/AR./Aprovechamiento de residuos para aumentar el reciclado en el suelo. Sumideros de carbono y emisiones del suelo.
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceGeoderma 392 : Art: 114987 (Junio 2021)es_AR
dc.subjectCenizaes_AR
dc.subjectAsheseng
dc.subjectSuelo Volcánicoes_AR
dc.subjectVolcanic Soilseng
dc.subjectTierras Húmedases_AR
dc.subjectWetlandseng
dc.subject.otherCeniza Volcánicaes_AR
dc.subject.otherRegión Patagónicaes_AR
dc.subject.otherHumedaleses_AR
dc.subject.otherMallineses_AR
dc.titleImmobilization and stabilization of volcanic ash in soil aggregates in semiarid meadows of Northern 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.origenEstación Experimental Agropecuaria Barilochees_AR
dc.description.filFil: Enriquez, Andrea Soledad. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentinaes_AR
dc.description.filFil: Enriquez, Andrea Soledad. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentinaes_AR
dc.description.filFil: Cremona, Maria Victoria. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentinaes_AR
dc.description.filFil: Peri, Pablo Luis. Instituto Nacional de Tecnologia Agropecuaria (INTA). Estación Experimental Agropecuaria Santa Cruz; Argentinaes_AR
dc.description.filFil: Six, Johan. Swiss Federal Institute of Technology. Department of Environmental Systems Science; Suizaes_AR
dc.description.filFil: Necpalova, Magdalena. University College Dublin Belfield. School of Agriculture & Food Science. Environment & Sustainable Resource Management; Irlandaes_AR
dc.subtypecientifico


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