Variations in soil chemical and physical properties explain basin-wide Amazon forest soil carbon concentrations

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorInst Nacl de Pesquisas da Amazonia-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniv Leeds-
Autor(es): dc.contributorImperial Coll London-
Autor(es): dc.contributorUniv Catolica Santisima Concepcion-
Autor(es): dc.contributorJames Cook Univ-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorQuesada, Carlos Alberto-
Autor(es): dc.creatorPaz, Claudia [UNESP]-
Autor(es): dc.creatorMendoza, Erick Oblitas-
Autor(es): dc.creatorPhillips, Oliver Lawrence-
Autor(es): dc.creatorSaiz, Gustavo-
Autor(es): dc.creatorLloyd, Jon-
Data de aceite: dc.date.accessioned2022-02-22T00:09:53Z-
Data de disponibilização: dc.date.available2022-02-22T00:09:53Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-02-10-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.5194/soil-6-53-2020-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/196588-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/196588-
Descrição: dc.descriptionWe investigate the edaphic, mineralogical and climatic controls of soil organic carbon (SOC) concentration utilising data from 147 primary forest soils (0-30 cm depth) sampled in eight different countries across the Amazon Basin. Sampled across 14 different World Reference Base soil groups, our data suggest that stabilisation mechanism varies with pedogenetic level. Specifically, although SOC concentrations in Ferralsols and Acrisols were best explained by simple variations in clay content - this presumably being due to their relatively uniform kaolinitic mineralogy - this was not the case for less weathered soils such as Alisols, Cambisols and Plinthosols for which interactions between Al species, soil pH and litter quality are argued to be much more important. Although for more strongly weathered soils the majority of SOC is located within the aggregate fraction, for the less weathered soils most of the SOC is located within the silt and clay fractions. It thus seems that for highly weathered soils SOC storage is mostly influenced by surface area variations arising from clay content, with physical protection inside aggregates rendering an additional level of protection against decomposition. On the other hand, most of the SOC in less weathered soils is associated with the precipitation of aluminium-carbon complexes within the fine soil fraction, with this mechanism enhanced by the presence of high levels of aromatic, carboxyl-rich organic matter compounds. Also examined as part of this study were a relatively small number of arenic soils (viz. Arenosols and Podzols) for which there was a small but significant influence of clay and silt content variations on SOM storage, with fractionation studies showing that particulate organic matter may account for up to 0.60 of arenic soil SOC. In contrast to what were in all cases strong influences of soil and/or litter quality properties, after accounting for these effects neither wood productivity, above-ground biomass nor precipitation/temperature variations were found to exert any significant influence on SOC stocks. These results have important implications for our understanding of how Amazon forest soils are likely to respond to ongoing and future climate changes.-
Descrição: dc.descriptionNatural Environment Research Council-
Descrição: dc.descriptionGordon and Betty Moore Foundation-
Descrição: dc.descriptionEuropean Research Council-
Descrição: dc.descriptionEU Seventh Framework Programme-
Descrição: dc.descriptionRoyal Society of London Research Merit Award-
Descrição: dc.descriptionSao Paulo Excellence Chair-
Descrição: dc.descriptionInst Nacl de Pesquisas da Amazonia, Cx Postal 2223, BR-69080971 Manaus, Amazonas, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Dept Ecol, BR-15506900 Rio Claro, SP, Brazil-
Descrição: dc.descriptionUniv Leeds, Sch Geog, Leeds LS2 9JT, W Yorkshire, England-
Descrição: dc.descriptionImperial Coll London, Dept Life Sci, Silwood Pk Campus,Buckhurst Rd, Ascot SL5 7PY, Berks, England-
Descrição: dc.descriptionUniv Catolica Santisima Concepcion, Fac Sci, Dept Environm Chem, Concepcion, Chile-
Descrição: dc.descriptionJames Cook Univ, Sch Trop & Marine Sci, Cairns, Qld 4870, Australia-
Descrição: dc.descriptionJames Cook Univ, Ctr Terr Environm & Sustainabil Sci, Cairns, Qld 4870, Australia-
Descrição: dc.descriptionUniv Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Dept Ecol, BR-15506900 Rio Claro, SP, Brazil-
Descrição: dc.descriptionNatural Environment Research Council: NE/D005590/1-
Descrição: dc.descriptionNatural Environment Research Council: NE/B503384/1-
Descrição: dc.descriptionNatural Environment Research Council: NE/D01025X/1-
Descrição: dc.descriptionNatural Environment Research Council: NE/I02982X/1-
Descrição: dc.descriptionNatural Environment Research Council: NE/F005806/1-
Descrição: dc.descriptionNatural Environment Research Council: NE/I028122/1-
Descrição: dc.descriptionGordon and Betty Moore Foundation: 1656-
Descrição: dc.descriptionEuropean Research Council: 291585-
Descrição: dc.descriptionEU Seventh Framework Programme: GEOCARBON283080-
Descrição: dc.descriptionEU Seventh Framework Programme: AMAZALERT-282664-
Formato: dc.format53-88-
Idioma: dc.languageen-
Publicador: dc.publisherCopernicus Gesellschaft Mbh-
Relação: dc.relationSoil-
???dc.source???: dc.sourceWeb of Science-
Título: dc.titleVariations in soil chemical and physical properties explain basin-wide Amazon forest soil carbon concentrations-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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