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1. | | CIA, E.; FUZATTO, M. G.; KONDO, J. I.; GALBIERI, R.; ALMEIDA, W. P. de; OLIVEIRA, A. B. de; KRZYZANOWSKY, A. A.; LEBEDENCO, A.; MARTINS, A. L. M.; MORELLO, C. de L.; PEREIRA, D. J.; MESQUITA NETO, D. R.; BOLONHEZ, D.; CHIAVEGATO, E. J.; MACHADO, E. F.; FURLANI JÚNIOR, E.; TAKIZAWA, E. K.; DIAS, F. L. F.; FARIAS, F. J. C.; KASAI, F. S.; OHL, G. de A.; CUNHA, H. F. da; BELOT, J. L.; CAVICHIOLI, J. C.; CARVALHO, L. H.; BERIAM, L. O. S.; OLIVEIRA, M. A. C. de; LANZA, M. A.; PEREIRA, M.; MICHELOTTO, M. D.; ITO, M. F.; PEDROSA, M. B.; SUASSUNA, N. D.; GALLO, P. B.; RECO, P. C.; AGUIAR, P. H.; LUDERS, R. R.; MATTOS, R. E. M. F.; FREITAS, R. S. de; RIZZI, U. dos S. Comportamento de genótipos de algodoeiro na presença de patógenos e nematóides em 2010. In: CONGRESSO BRASILEIRO DO ALGODÃO, 8.; COTTON EXPO, 1., 2011, São Paulo. Evolução da cadeia para construção de um setor forte: Anais. Campina Grande, PB: Embrapa Algodão, 2011. p.1344-1349 Biblioteca(s): Embrapa Algodão. |
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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 |
Circulação/Nível: |
A - 1 |
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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