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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
16/10/2018 |
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Data da última atualização: |
19/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FONTES, C. G.; DAWSON, T. E.; JARDINE, K.; McDOWELL, N.; GIMENEZ, B. O.; ANDEREGG, L.; NEGRÓN-JUÁREZ, R.; HIGUCHI, N.; FINE, P. V. A.; ARAUJO, A. C. de; CHAMBERS, J. Q. |
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Afiliação: |
Clarissa G. Fontes, University of California at Berkeley; Todd E. Dawson, University of California at Berkeley; Kolby Jardine, Lawrence Berkeley National Laboratory / INPA; Nate McDowell, Pacific Northwest National Laboratory; Bruno O. Gimenez, INPA; Leander Anderegg, University of California at Berkeley; Robinson Negrón-Juárez, Lawrence Berkeley National Laboratory; Niro Higuchi, INPA; Paul V. A. Fine, University of California at Berkeley; ALESSANDRO CARIOCA DE ARAUJO, CPATU; Jeffrey Q. Chambers, Lawrence Berkeley National Laboratory / University of California Berkeley. |
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Título: |
Dry and hot: the hydraulic consequences of a climate change-type drought for Amazonian trees. |
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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, 2018. |
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DOI: |
10.1098/rstb.2018.0209 |
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Idioma: |
Inglês |
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Conteúdo: |
How plants respond physiologically to leaf warming and low water availability may determine how they will perform under future climate change. In 2015?2016, an unprecedented drought occurred across Amazonia with record-breaking high temperatures and low soil moisture, offering a unique opportunity to evaluate the performances of Amazonian trees to a severe climatic event. We quantified the responses of leaf water potential, sap velocity, whole-tree hydraulic conductance (Kwt), turgor loss and xylem embolism, during and after the 2015?2016 El Niño for five canopy-tree species. Leaf/xylem safety margins (SMs), sap velocity and Kwt showed a sharp drop during warm periods. SMs were negatively correlated with vapour pressure deficit, but had no significant relationship with soil water storage. Based on our calculations of canopy stomatal and xylem resistances, the decrease in sap velocity and Kwt was due to a combination of xylem cavitation and stomatal closure. Our results suggest that warm droughts greatly amplify the degree of trees' physiological stress and can lead to mortality. Given the extreme nature of the 2015?2016 El Niño and that temperatures are predicted to increase, this work can serve as a case study of the possible impact climate warming can have on tropical trees. This article is part of a discussion meeting issue "The impact of the 2015/2016 El Niño on the terrestrial tropical carbon cycle: patterns, mechanisms and implications". |
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Thesagro: |
Aquecimento; Floresta Tropical; Mudança Climática; Seca. |
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Thesaurus Nal: |
El Nino. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02377naa a2200313 a 4500
001 2097462
005 2022-05-19
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1098/rstb.2018.0209$2DOI
100 1 $aFONTES, C. G.
245 $aDry and hot$bthe hydraulic consequences of a climate change-type drought for Amazonian trees.$h[electronic resource]
260 $c2018
520 $aHow plants respond physiologically to leaf warming and low water availability may determine how they will perform under future climate change. In 2015?2016, an unprecedented drought occurred across Amazonia with record-breaking high temperatures and low soil moisture, offering a unique opportunity to evaluate the performances of Amazonian trees to a severe climatic event. We quantified the responses of leaf water potential, sap velocity, whole-tree hydraulic conductance (Kwt), turgor loss and xylem embolism, during and after the 2015?2016 El Niño for five canopy-tree species. Leaf/xylem safety margins (SMs), sap velocity and Kwt showed a sharp drop during warm periods. SMs were negatively correlated with vapour pressure deficit, but had no significant relationship with soil water storage. Based on our calculations of canopy stomatal and xylem resistances, the decrease in sap velocity and Kwt was due to a combination of xylem cavitation and stomatal closure. Our results suggest that warm droughts greatly amplify the degree of trees' physiological stress and can lead to mortality. Given the extreme nature of the 2015?2016 El Niño and that temperatures are predicted to increase, this work can serve as a case study of the possible impact climate warming can have on tropical trees. This article is part of a discussion meeting issue "The impact of the 2015/2016 El Niño on the terrestrial tropical carbon cycle: patterns, mechanisms and implications".
650 $aEl Nino
650 $aAquecimento
650 $aFloresta Tropical
650 $aMudança Climática
650 $aSeca
700 1 $aDAWSON, T. E.
700 1 $aJARDINE, K.
700 1 $aMcDOWELL, N.
700 1 $aGIMENEZ, B. O.
700 1 $aANDEREGG, L.
700 1 $aNEGRÓN-JUÁREZ, R.
700 1 $aHIGUCHI, N.
700 1 $aFINE, P. V. A.
700 1 $aARAUJO, A. C. de
700 1 $aCHAMBERS, J. Q.
773 $tPhilosophical Transactions of the Royal Society B$gv. 373, n. 1760, 2018.
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Embrapa Amazônia Oriental (CPATU) |
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| 1. |  | CALHEIROS, A. S.; OLIVEIRA, M. W. de; GAVA, G. J. de C.; FERREIRA, V. M.; SOUZA, O.; SILVA, P. B. da; ARISTIDES, E. V. dos S. Adubação fosfatada, acúmulo de biomassa e teores de proteína e fósforo em duas variedades de cana-de-açúcar. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 28.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 12.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 10.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 7., 2008, Londrina. Desafios para o uso do solo com eficiência e qualidade ambiental: resumos. Londrina: Embrapa Soja: SBCS: IAPAR: UEL, 2008. 365 p.| Tipo: Artigo em Anais de Congresso |
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