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dc.contributor.authorThomazini, Andre-
dc.contributor.authorTeixeira, Daniel De Bortoli-
dc.contributor.authorGabrig Turbay, Caio Vinicius-
dc.contributor.authorLa Scala, Newton-
dc.contributor.authorSchaefer, Carlos Ernesto G. R.-
dc.contributor.authorMendonca, Eduardo De Sa-
dc.identifier.citationPermafrost And Periglacial Processes. Hoboken: Wiley-blackwell, v. 25, n. 4, p. 233-242, 2014.-
dc.description.abstractThawed soils in Antarctica represent organic carbon (C) reservoirs with great potential to increase the net losses of CO2 to the atmosphere under climate change scenarios. This study spatially zones CO2 emissions from soil and vegetation along a transect in front of the retreating margin of Ecology Glacier in Admiralty Bay, King George Island, South Shetlands, near the Polish Antarctic station Henryk Arctowski. Two experiments were carried out to determine soil respiration: (1) a transect of 150 measuring points spaced 1m apart, statistically analysed with split moving windows, identified three regions with different patterns of CO2 emissions; (2) a survey with three grids containing 60 sampling points, with a minimum distance between points of 0.30m, totalling 2.7x1.5m, in each of the identified locations. The survey showed that CO2 emission rates decreased (from 2.38 to 0.00 mu molm(-2)s(-1)) and soil temperature at 5cm depth increased (from 1.9 to 7 degrees C) near the glacier. The site farthest from the glacier provided an emission 3.5 times higher than the closest site. The spatial variability of CO2 emissions decreased with distance from the glacier. Soil development and vegetation are identified as key drivers of CO2 emissions. Soil formation and vegetation growth increased with longer exposure since deglaciation, leading to enhanced homogeneity of CO2 emissions, independent of permafrost occurrence and stability. Copyright (c) 2014 John Wiley & Sons, Ltd.en
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.sourceWeb of Science-
dc.subjectsoil organic matteren
dc.subjectorganic carbonen
dc.titleSpatial Variability of CO2 Emissions from Newly Exposed Paraglacial Soils at a Glacier Retreat Zone on King George Island, Maritime Antarcticaen
dc.contributor.institutionUniv Fed Espirito Santo-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Federal de Viçosa (UFV)-
dc.description.affiliationUniv Fed Espirito Santo, Dept Plant Prod, BR-29500000 Alegre, Espirito Santo, Brazil-
dc.description.affiliationUniv Estadual Paulista Solos & Adubos, Sao Paulo, Brazil-
dc.description.affiliationUniv Fed Espirito Santo, Dept Geol, BR-29500000 Alegre, Espirito Santo, Brazil-
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil-
dc.description.affiliationUniv Fed Vicosa, Dept Soils, Vicosa, MG, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista Solos & Adubos, Sao Paulo, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofPermafrost And Periglacial Processes-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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