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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Roraima. |
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Data corrente: |
12/03/2019 |
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Data da última atualização: |
27/12/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, C. V. J.; ARAGÃO, L. E. O. C.; BARLOW, J.; ESPIRITO-SANTO, F.; YOUNG, P. J.; ANDERSON, L. O.; BERENGUER, E.; BRASIL, I.; BROWN, I. F.; CASTRO, B.; FARIAS, R.; FERREIRA, J. N.; FRANÇA, F.; GRAÇA, P. M. L. A.; KIRSTEN, L.; LOPES, A. P.; SALIMON, C.; SCARANELLO, M. A.; SEIXAS, M.; SOUZA, F. C.; XAUD, H. A. M. |
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Afiliação: |
Camila V. J. Silva, Lancaster University / INPE; Luiz E. O. C. Aragão, INPE / University of Exeter; Jos Barlow, Lancaster University; Fernando Espirito-Santo, University of Leicester, University Road; Paul J. Young, Lancaster University; Liana O. Anderson, CEMADEN / University of Oxford; Erika Berenguer, CEMADEN / University of Oxford; Izaias Brasil, UFAC; I. Foster Brown, UFAC / Woods Hole Research Center; Bruno Castro, Instituto Centro de Vida; Renato Farias, Instituto Centro de Vida; JOICE NUNES FERREIRA, CPATU; Filipe França, Lancaster University / CPATU; Paulo M. L. A. Graça, INPA; Letícia Kirsten, INPA; Aline P. Lopes, INPE; Cleber Salimon, Universidade Estadual da Paraíba; Marcos Augusto Scaranello, Instituto Centro de Vida / CNPTIA; Marina Seixas, COLABORADORA CPATU; Fernanda C. Souza, University of Leeds; HARON ABRAHIM MAGALHAES XAUD, CPAF-RR. |
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Título: |
Drought-induced Amazonian wildfires instigate a decadal-scale disruption of forest carbon dynamics. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Philosophical Transactions of the Royal Society B, v. 373, n. 1760, p. 1-12, Nov. 2018. |
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DOI: |
10.1098/rstb.2018.0043 |
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Idioma: |
Inglês |
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Conteúdo: |
Drought-induced wildfires have increased in frequency and extent over the tropics. Yet, the long-term (greater than 10 years) responses of Amazonian lowland forests to fire disturbance are poorly known. To understand post-fire forest biomass dynamics, and to assess the time required for fire-affected forests to recover to pre-disturbance levels, we combined 16 single with 182 multiple forest census into a unique large-scale and long-term dataset across the Brazilian Amazonia. We quantified biomass, mortality and wood productivity of burned plots along a chronosequence of up to 31 years post-fire and compared to surrounding unburned plots measured simultaneously. Stem mortality and growth were assessed among functional groups. At the plot level, we found that fire-affected forests have biomass levels 24.8 ± 6.9% below the biomass value of unburned control plots after 31 years. This lower biomass state results from the elevated levels of biomass loss through mortality, which is not sufficiently compensated for by wood productivity (incremental growth + recruitment). At the stem level, we found major changes in mortality and growth rates up to 11 years post-fire. The post-fire stem mortality rates exceeded unburned control plots by 680% (i.e. greater than 40 cm diameter at breast height (DBH); 5?8 years since last fire) and 315% (i.e. greater than 0.7 g cm−3 wood density; 0.75?4 years since last fire). Our findings indicate that wildfires in humid tropical forests can significantly reduce forest biomass for decades by enhancing mortality rates of all trees, including large and high wood density trees, which store the largest amount of biomass in old-growth forests. This assessment of stem dynamics, therefore, demonstrates that wildfires slow down or stall the post-fire recovery of Amazonian forests. MenosDrought-induced wildfires have increased in frequency and extent over the tropics. Yet, the long-term (greater than 10 years) responses of Amazonian lowland forests to fire disturbance are poorly known. To understand post-fire forest biomass dynamics, and to assess the time required for fire-affected forests to recover to pre-disturbance levels, we combined 16 single with 182 multiple forest census into a unique large-scale and long-term dataset across the Brazilian Amazonia. We quantified biomass, mortality and wood productivity of burned plots along a chronosequence of up to 31 years post-fire and compared to surrounding unburned plots measured simultaneously. Stem mortality and growth were assessed among functional groups. At the plot level, we found that fire-affected forests have biomass levels 24.8 ± 6.9% below the biomass value of unburned control plots after 31 years. This lower biomass state results from the elevated levels of biomass loss through mortality, which is not sufficiently compensated for by wood productivity (incremental growth + recruitment). At the stem level, we found major changes in mortality and growth rates up to 11 years post-fire. The post-fire stem mortality rates exceeded unburned control plots by 680% (i.e. greater than 40 cm diameter at breast height (DBH); 5?8 years since last fire) and 315% (i.e. greater than 0.7 g cm−3 wood density; 0.75?4 years since last fire). Our findings indicate that wildfires in humid tropical forests can sig... Mostrar Tudo |
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Palavras-Chave: |
Dinâmica do carbono. |
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Thesagro: |
Floresta Tropical; Incêndio Florestal; Seca. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03043naa a2200421 a 4500
001 2106971
005 2019-12-27
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1098/rstb.2018.0043$2DOI
100 1 $aSILVA, C. V. J.
245 $aDrought-induced Amazonian wildfires instigate a decadal-scale disruption of forest carbon dynamics.$h[electronic resource]
260 $c2018
520 $aDrought-induced wildfires have increased in frequency and extent over the tropics. Yet, the long-term (greater than 10 years) responses of Amazonian lowland forests to fire disturbance are poorly known. To understand post-fire forest biomass dynamics, and to assess the time required for fire-affected forests to recover to pre-disturbance levels, we combined 16 single with 182 multiple forest census into a unique large-scale and long-term dataset across the Brazilian Amazonia. We quantified biomass, mortality and wood productivity of burned plots along a chronosequence of up to 31 years post-fire and compared to surrounding unburned plots measured simultaneously. Stem mortality and growth were assessed among functional groups. At the plot level, we found that fire-affected forests have biomass levels 24.8 ± 6.9% below the biomass value of unburned control plots after 31 years. This lower biomass state results from the elevated levels of biomass loss through mortality, which is not sufficiently compensated for by wood productivity (incremental growth + recruitment). At the stem level, we found major changes in mortality and growth rates up to 11 years post-fire. The post-fire stem mortality rates exceeded unburned control plots by 680% (i.e. greater than 40 cm diameter at breast height (DBH); 5?8 years since last fire) and 315% (i.e. greater than 0.7 g cm−3 wood density; 0.75?4 years since last fire). Our findings indicate that wildfires in humid tropical forests can significantly reduce forest biomass for decades by enhancing mortality rates of all trees, including large and high wood density trees, which store the largest amount of biomass in old-growth forests. This assessment of stem dynamics, therefore, demonstrates that wildfires slow down or stall the post-fire recovery of Amazonian forests.
650 $aFloresta Tropical
650 $aIncêndio Florestal
650 $aSeca
653 $aDinâmica do carbono
700 1 $aARAGÃO, L. E. O. C.
700 1 $aBARLOW, J.
700 1 $aESPIRITO-SANTO, F.
700 1 $aYOUNG, P. J.
700 1 $aANDERSON, L. O.
700 1 $aBERENGUER, E.
700 1 $aBRASIL, I.
700 1 $aBROWN, I. F.
700 1 $aCASTRO, B.
700 1 $aFARIAS, R.
700 1 $aFERREIRA, J. N.
700 1 $aFRANÇA, F.
700 1 $aGRAÇA, P. M. L. A.
700 1 $aKIRSTEN, L.
700 1 $aLOPES, A. P.
700 1 $aSALIMON, C.
700 1 $aSCARANELLO, M. A.
700 1 $aSEIXAS, M.
700 1 $aSOUZA, F. C.
700 1 $aXAUD, H. A. M.
773 $tPhilosophical Transactions of the Royal Society B$gv. 373, n. 1760, p. 1-12, Nov. 2018.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
03/09/1999 |
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Data da última atualização: |
28/06/2019 |
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Autoria: |
PEREIRA-NETTO, A.B. de; MAGALHÃES, A. C. N. de; PINTO, H. S. |
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Afiliação: |
ADAUCTO BELLARMINO DE PEREIRA-NETTO, Universidade Federal do Paraná - UFPR/Departamento de Botânica/Setor Ciências Biológicas; ANTONIO CELSO NOVAES DE MAGALHÃES, Universidade Estadual de Campinas - UNICAMP/Departamento de Fisiologia Vegetal; HILTON SILVEIRA PINTO, Universidade Estadual de Campinas - UNICAMP/Departamento de Fisiologia Vegetal. |
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Título: |
Effects of soil water depletion on the water relations in tropical kudzu. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 34, n. 7, p. 1151-57, jul. 1999 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Efeito da deficiência hídrica no solo sobre as relações hídricas em pecuária. |
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Conteúdo: |
Tropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae; Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (Tl) in tropical kudzu. RWC of water-stressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g(H2O).g(dry soil)-1. Stomatal conductance of stressed plants decreased from 221 to 99 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in Tl between water-stressed and unstressed plants (Delta Tl) rose linearly from 0.1 to 2.2 Graus C. following progressive water deficit. RWC and Tl of water-stressed plants paralled RWC and Tl of unstressed plants the day after re-irrigation. The strong decrease in SWC found in this study only induced moderate water stress in tropical kudzu. In addition, tropical kudzu recover rapidly from the induced water stress after the re-irrigation. |
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Palavras-Chave: |
Cover crop; Cultura de cobertura; Deficit hidrico; Ecofisiologia; Water deficit. |
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Thesagro: |
Forragem; Leguminosae; Pueraria Phaseoloides. |
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Thesaurus NAL: |
ecophysiology; forage. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/108621/1/EFFECTS.pdf
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Marc: |
LEADER 02073naa a2200277 a 4500
001 1089606
005 2019-06-28
008 1999 bl uuuu u00u1 u #d
100 1 $aPEREIRA-NETTO, A.B. de
245 $aEffects of soil water depletion on the water relations in tropical kudzu.
260 $c1999
500 $aTítulo em português: Efeito da deficiência hídrica no solo sobre as relações hídricas em pecuária.
520 $aTropical kudzu (Pueraria phaseoloides (Roxb.) Benth., Leguminosae; Faboideae) is native to the humid Southeastern Asia. Tropical kudzu has potential as a cover crop in regions subjected to dryness. The objective of this paper was to evaluate the effect of soil water depletion on leaflet relative water content (RWC), stomatal conductance (g) and temperature (Tl) in tropical kudzu. RWC of water-stressed plants dropped from 96 to 78%, following a reduction in SWC from 0.25 to 0.17 g(H2O).g(dry soil)-1. Stomatal conductance of stressed plants decreased from 221 to 99 mmol.m-2.s-1, following the reduction in soil water content (SWC). The day after re-irrigation, g of water stressed plants was 15% lower than g of unstressed plants. Differences in Tl between water-stressed and unstressed plants (Delta Tl) rose linearly from 0.1 to 2.2 Graus C. following progressive water deficit. RWC and Tl of water-stressed plants paralled RWC and Tl of unstressed plants the day after re-irrigation. The strong decrease in SWC found in this study only induced moderate water stress in tropical kudzu. In addition, tropical kudzu recover rapidly from the induced water stress after the re-irrigation.
650 $aecophysiology
650 $aforage
650 $aForragem
650 $aLeguminosae
650 $aPueraria Phaseoloides
653 $aCover crop
653 $aCultura de cobertura
653 $aDeficit hidrico
653 $aEcofisiologia
653 $aWater deficit
700 1 $aMAGALHÃES, A. C. N. de
700 1 $aPINTO, H. S.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 34, n. 7, p. 1151-57, jul. 1999
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