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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
04/12/2023 |
Data da última atualização: |
04/12/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
MENG, L.; CHAMBERS, J.; KOVEN, C.; PASTORELLO, G.; GIMENEZ, B.; JARDINE, K.; TANG, Y.; McDOWELL, N.; NEGRON-JUAREZ, R.; LONGO, M.; ARAUJO, A. C. de; TOMASELLA, J.; FONTES, C.; MOHAN, M.; HIGUCHI, N. |
Afiliação: |
LIN MENG, Lawrence Berkeley National Laboratory; JEFFREY CHAMBERS, Lawrence Berkeley National Laboratory / University of California Berkeley; CHARLES KOVEN, Lawrence Berkeley National Laboratory; GILBERTO PASTORELLO, Lawrence Berkeley National Laboratory; BRUNO GIMENEZ, INPA / Smithsonian Tropical Research Institute; KOLBY JARDINE, Lawrence Berkeley National Laboratory; YAO TANG, Lawrence Berkeley National Laboratory; NATE MCDOWELL, Pacific Northwest National Laboratory; ROBINSON NEGRON-JUAREZ, Lawrence Berkeley National Laboratory; MARCOS LONGO, Lawrence Berkeley National Laboratory; ALESSANDRO CARIOCA DE ARAUJO, CPATU; JAVIER TOMASELLA, Centro Nacional de Monitoramento e Alertas de Desastres Naturais—CEMADEN; CLARISSA FONTES, University of California; MIDHUN MOHAN, Lawrence Berkeley National Laboratory / University of California Berkeley; NIRO HIGUCHI, INPA. |
Título: |
Soil moisture thresholds explain a shift from light-limited to water-limited sap velocity in the Central Amazon during the 2015-16 El Niño drought. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Environmental Research Letters, v. 17, n. 6, 064023, 2022. |
DOI: |
https://doi.org/10.1088/1748-9326/ac6f6d |
Idioma: |
Inglês |
Conteúdo: |
Transpiration is often considered to be light- but not water-limited in humid tropical rainforests due to abundant soil water, even during the dry seasons. The record-breaking 2015?16 El Niño drought provided a unique opportunity to examine whether transpiration is constrained by water under severe lack of rainfall. We measured sap velocity, soil water content, and meteorological variables in an old-growth upland forest in the Central Amazon throughout the 2015?16 drought. We found a rapid decline in sap velocity (-38 ± 21%, mean ± SD.) and in its temporal variability (-88%) during the drought compared to the wet season. Such changes were accompanied by a marked decline in soil moisture and an increase in temperature and vapor pressure deficit. Sap velocity was largely limited by net radiation during the wet and normal dry seasons; however, it shifted to be primarily limited by soil moisture during the drought. The threshold in which sap velocity became dominated by soil moisture was at 0.33 m3 m-3 (around -150 kPa in soil matric potential), below which sap velocity dropped steeply. Our study provides evidence for a soil water threshold on transpiration in a moist tropical forest, suggesting a shift from light limitation to water limitation under future climate characterized by increased temperature and an increased frequency, intensity, duration and extent of extreme drought events. |
Palavras-Chave: |
Ciclo da água; Soil moisture; Water cycle. |
Thesagro: |
Evapotranspiração; Floresta Tropical; Seca; Umidade do Solo. |
Thesaurus Nal: |
Drought; Evapotranspiration; Tropical forests. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02623naa a2200421 a 4500 001 2159119 005 2023-12-04 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1088/1748-9326/ac6f6d$2DOI 100 1 $aMENG, L. 245 $aSoil moisture thresholds explain a shift from light-limited to water-limited sap velocity in the Central Amazon during the 2015-16 El Niño drought.$h[electronic resource] 260 $c2022 520 $aTranspiration is often considered to be light- but not water-limited in humid tropical rainforests due to abundant soil water, even during the dry seasons. The record-breaking 2015?16 El Niño drought provided a unique opportunity to examine whether transpiration is constrained by water under severe lack of rainfall. We measured sap velocity, soil water content, and meteorological variables in an old-growth upland forest in the Central Amazon throughout the 2015?16 drought. We found a rapid decline in sap velocity (-38 ± 21%, mean ± SD.) and in its temporal variability (-88%) during the drought compared to the wet season. Such changes were accompanied by a marked decline in soil moisture and an increase in temperature and vapor pressure deficit. Sap velocity was largely limited by net radiation during the wet and normal dry seasons; however, it shifted to be primarily limited by soil moisture during the drought. The threshold in which sap velocity became dominated by soil moisture was at 0.33 m3 m-3 (around -150 kPa in soil matric potential), below which sap velocity dropped steeply. Our study provides evidence for a soil water threshold on transpiration in a moist tropical forest, suggesting a shift from light limitation to water limitation under future climate characterized by increased temperature and an increased frequency, intensity, duration and extent of extreme drought events. 650 $aDrought 650 $aEvapotranspiration 650 $aTropical forests 650 $aEvapotranspiração 650 $aFloresta Tropical 650 $aSeca 650 $aUmidade do Solo 653 $aCiclo da água 653 $aSoil moisture 653 $aWater cycle 700 1 $aCHAMBERS, J. 700 1 $aKOVEN, C. 700 1 $aPASTORELLO, G. 700 1 $aGIMENEZ, B. 700 1 $aJARDINE, K. 700 1 $aTANG, Y. 700 1 $aMcDOWELL, N. 700 1 $aNEGRON-JUAREZ, R. 700 1 $aLONGO, M. 700 1 $aARAUJO, A. C. de 700 1 $aTOMASELLA, J. 700 1 $aFONTES, C. 700 1 $aMOHAN, M. 700 1 $aHIGUCHI, N. 773 $tEnvironmental Research Letters$gv. 17, n. 6, 064023, 2022.
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Embrapa Amazônia Oriental (CPATU) |
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Biblioteca(s): |
Embrapa Hortaliças; Embrapa Semiárido. |
Data corrente: |
30/10/2009 |
Data da última atualização: |
22/08/2022 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
LIMA, M. F.; NAGATA, T.; NEVES, F. M.; INOUE NAGATA, A. K.; MOITA, A. C.; SOUSA, C.; DELLA VECCHIA, M.; RANGEL, M. G.; DIAS, R. de C. S.; DUTRA, L. D.; ÁVILA, A. C. de. |
Afiliação: |
MIRTES FREITAS LIMA, CNPH; ALICE KAZUKO INOUE NAGATA, CNPH; RITA DE CASSIA SOUZA DIAS, CPATSA. |
Título: |
Occurrence of melon yellowing-associated virus (MYaV) in melon producing areas of Brazilian Northeast. |
Ano de publicação: |
2009 |
Fonte/Imprenta: |
Tropical Plant Pathology, v. 34, p. S278, ago. 2009. |
Idioma: |
Inglês |
Notas: |
Suplemento. Edição dos Resumos do 42 Congresso Brasileiro de Fitopatologia, Rio de Janeiro, ago. 2009. Nome correto do pesquisador é Antonio Williams Moita - MOITA, A. W. |
Conteúdo: |
The airn of this study was to evaluate the occurrence of the MYaV in melon plants exhibiting suspicious symptoms of the disease in major melon growing fields of Northeast. |
Palavras-Chave: |
MYaV; Sintomas. |
Thesagro: |
Cucumis Melo; Melão; Planta; Produção; Vírus. |
Thesaurus NAL: |
Melons. |
Categoria do assunto: |
-- H Saúde e Patologia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/133441/1/ID-42240.pdf
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Marc: |
LEADER 01246nam a2200337 a 4500 001 1579630 005 2022-08-22 008 2009 bl uuuu u00u1 u #d 100 1 $aLIMA, M. F. 245 $aOccurrence of melon yellowing-associated virus (MYaV) in melon producing areas of Brazilian Northeast.$h[electronic resource] 260 $aTropical Plant Pathology, v. 34, p. S278, ago. 2009.$c2009 500 $aSuplemento. Edição dos Resumos do 42 Congresso Brasileiro de Fitopatologia, Rio de Janeiro, ago. 2009. Nome correto do pesquisador é Antonio Williams Moita - MOITA, A. W. 520 $aThe airn of this study was to evaluate the occurrence of the MYaV in melon plants exhibiting suspicious symptoms of the disease in major melon growing fields of Northeast. 650 $aMelons 650 $aCucumis Melo 650 $aMelão 650 $aPlanta 650 $aProdução 650 $aVírus 653 $aMYaV 653 $aSintomas 700 1 $aNAGATA, T. 700 1 $aNEVES, F. M. 700 1 $aINOUE NAGATA, A. K. 700 1 $aMOITA, A. C. 700 1 $aSOUSA, C. 700 1 $aDELLA VECCHIA, M. 700 1 $aRANGEL, M. G. 700 1 $aDIAS, R. de C. S. 700 1 $aDUTRA, L. D. 700 1 $aÁVILA, A. C. de
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