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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
23/11/2011 |
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Data da última atualização: |
11/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DAVIDSON, E.; LEFEBVRE, P. A.; BRANDO, P. M.; RAY, D. M.; TRUMBORE, S. E.; SOLORZANO, L. A.; FERREIRA, J. N.; BUSTAMANTE, M. M. da C.; NEPSTAD, D. C. |
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Afiliação: |
Eric A. Davidson, Woods Hole Research Center; Paul A. Lefebvre, Woods Hole Research Center; Paulo M. Brando, IPAM; David Ray, Tall Timbers Research Station; Susan E. Trumbore, University of California; Luis A. Solorzano, The Gordon and Betty Moore Foundation; JOICE NUNES FERREIRA, CPATU; Mercedes M. da C. Bustamante, UNB; Daniel C. Nepstad, The Woods Hole Research Center. |
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Título: |
Carbon inputs and water uptake in deep soils of an Eastern Amazon forest. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Forest Science, v. 57, n. 1, p. 51-58, Feb. 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Rooting depth affects soil profiles of water uptake and carbon inputs. Here we explore the importance of deep roots in a mature tropical forest of eastern Amazonia, where a throughfall exclusion experiment was conducted to test the resilience of the forest to experimentally induced drought. We hypothesized that soil water depletion occurred below the depth previously measured by sensors in 11-m-deep soil pits and that only a small root biomass is necessary to affect water uptake and the isotopic signature of soil CO2. A noninvasive electrical profiling method demonstrated greater depletion of soil water in the 11?18 m depth increment in the exclusion plot compared with the control plot by the end of the 3rd year of the experiment. A fine root biomass of only 0.1 g/cm3 measured at 3?6 m was sufficient for soil water drawdown and for imparting an isotopic signature of modern soil 14CO2 in both plots. A soil 13CO2 profile indicated drought stress in the exclusion plot. Fine root inputs of organic C to deep soils are small with respect to the carbon dynamics of the forest, but the deep rooting habit clearly affects the ecosystem water balance and profiles of soil CO2. FOR. SCI. 57(1):51?58. |
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Palavras-Chave: |
Co2. |
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Thesagro: |
Água; Matéria Orgânica; Solo. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01928naa a2200265 a 4500
001 1906991
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100 1 $aDAVIDSON, E.
245 $aCarbon inputs and water uptake in deep soils of an Eastern Amazon forest.$h[electronic resource]
260 $c2011
520 $aRooting depth affects soil profiles of water uptake and carbon inputs. Here we explore the importance of deep roots in a mature tropical forest of eastern Amazonia, where a throughfall exclusion experiment was conducted to test the resilience of the forest to experimentally induced drought. We hypothesized that soil water depletion occurred below the depth previously measured by sensors in 11-m-deep soil pits and that only a small root biomass is necessary to affect water uptake and the isotopic signature of soil CO2. A noninvasive electrical profiling method demonstrated greater depletion of soil water in the 11?18 m depth increment in the exclusion plot compared with the control plot by the end of the 3rd year of the experiment. A fine root biomass of only 0.1 g/cm3 measured at 3?6 m was sufficient for soil water drawdown and for imparting an isotopic signature of modern soil 14CO2 in both plots. A soil 13CO2 profile indicated drought stress in the exclusion plot. Fine root inputs of organic C to deep soils are small with respect to the carbon dynamics of the forest, but the deep rooting habit clearly affects the ecosystem water balance and profiles of soil CO2. FOR. SCI. 57(1):51?58.
650 $aÁgua
650 $aMatéria Orgânica
650 $aSolo
653 $aCo2
700 1 $aLEFEBVRE, P. A.
700 1 $aBRANDO, P. M.
700 1 $aRAY, D. M.
700 1 $aTRUMBORE, S. E.
700 1 $aSOLORZANO, L. A.
700 1 $aFERREIRA, J. N.
700 1 $aBUSTAMANTE, M. M. da C.
700 1 $aNEPSTAD, D. C.
773 $tForest Science$gv. 57, n. 1, p. 51-58, Feb. 2011.
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| 42. |  | DRUMOND, M. A.; SILVA, A. F. da. Fitosociologia y composicion floristica del bosque Salao Dourado del Parque Estadual do Rio Doce, Minas Gerais, Brasil. In: CONGRESO LATINOAMERICANO IUFRO, 1., 1998, Valdivia, Chile, 1998. Actas... Valdivia: IUFRO, 1998. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
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