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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
26/08/2021 |
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Data da última atualização: |
03/03/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CHALK, P. M.; BALIEIRO, F. de C.; CHEN, D. |
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Afiliação: |
PHILLIP M. CHALK, UNIVERSITY OF MELBOURNE; FABIANO DE CARVALHO BALIEIRO, CNPS; DELI CHEN, UNIVERSITY OF MELBOURNE. |
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Título: |
Quantitative estimation of carbon dynamics in terrestrial ecosystems using natural variations in the delta C-13 abundance of soils and biota. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Advances in Agronomy, v. 167, p. 63-104, 2021. |
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DOI: |
https://doi.org/10.1016/bs.agron.2020.12.002 |
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Idioma: |
Inglês |
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Conteúdo: |
The dynamics of C in terrestrial ecosystems can be traced on the basis of the marked differences in the delta C-13 signatures of plants possessing the C-3, C-4 or CAM photosynthetic pathways. When two C sources differing in natural C-13 abundance (delta C-13) contribute to a mixture, the relative contribution of each can be quantitatively apportioned by the use of a two-end-member mixing model. This ability of delta C-13 to partition source is unique among stable isotopes important in the biosphere, where with few exceptions, natural abundance signatures are used as qualitative rather than quantitative tracers because of isotopic fractionation. The many and varied applications of delta C-13 in apportioning C source are examined herein. They include estimation of soil organic matter turnover due to either a known or presumed change in vegetation cover, the contribution of organic materials to the soil C pool, the contribution of C source to vertebrate and invertebrate diets, disentangling roots in mixed C-3-C-4 stands, and partitioning the sources of respired CO2 in various C-3-C-4 mixtures, i.e., between plants and soil, between plants, between animal excreta slurries and soil, within fungal media and within biochar-amended soil. |
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Palavras-Chave: |
13C natural abundance; C dynamics; Delta 13C; Mixing models. |
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Thesaurus Nal: |
Fractionation. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01959naa a2200217 a 4500
001 2133878
005 2022-03-03
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/bs.agron.2020.12.002$2DOI
100 1 $aCHALK, P. M.
245 $aQuantitative estimation of carbon dynamics in terrestrial ecosystems using natural variations in the delta C-13 abundance of soils and biota.$h[electronic resource]
260 $c2021
520 $aThe dynamics of C in terrestrial ecosystems can be traced on the basis of the marked differences in the delta C-13 signatures of plants possessing the C-3, C-4 or CAM photosynthetic pathways. When two C sources differing in natural C-13 abundance (delta C-13) contribute to a mixture, the relative contribution of each can be quantitatively apportioned by the use of a two-end-member mixing model. This ability of delta C-13 to partition source is unique among stable isotopes important in the biosphere, where with few exceptions, natural abundance signatures are used as qualitative rather than quantitative tracers because of isotopic fractionation. The many and varied applications of delta C-13 in apportioning C source are examined herein. They include estimation of soil organic matter turnover due to either a known or presumed change in vegetation cover, the contribution of organic materials to the soil C pool, the contribution of C source to vertebrate and invertebrate diets, disentangling roots in mixed C-3-C-4 stands, and partitioning the sources of respired CO2 in various C-3-C-4 mixtures, i.e., between plants and soil, between plants, between animal excreta slurries and soil, within fungal media and within biochar-amended soil.
650 $aFractionation
653 $a13C natural abundance
653 $aC dynamics
653 $aDelta 13C
653 $aMixing models
700 1 $aBALIEIRO, F. de C.
700 1 $aCHEN, D.
773 $tAdvances in Agronomy$gv. 167, p. 63-104, 2021.
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