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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. |
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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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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
20/03/2018 |
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Data da última atualização: |
24/01/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SIGNOR, D.; DEON, M. D.; CAMARGO, P. B. de; CERRI, C. E. P. |
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Afiliação: |
DIANA SIGNOR DEON, CPATSA; MAGNUS DALLIGNA DEON, CPATSA; PLÍNIO BARBOSA DE CAMARGO, USP/CENA; CARLOS EDUARDO PELLEGRINO CERRI, University of São Paulo/ESALQ. |
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Título: |
Quantity and quality of soil organic matter as a sustainability index different land uses in eastern Amazon. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Scientia Agrícola, Piracicaba, v. 75, n. 3, p. 225-232, may/jun. 2018. |
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ISSN: |
1678-992X |
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DOI: |
10.1590/1678-992X-2016-0089 |
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Idioma: |
Inglês |
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Conteúdo: |
Soil organic matter (SOM), which influences chemical, physical and biological soil attributes, is the main form of C found in the soil which can also be used as a soil sustainability index. The aim of this study was to use the quantity and quality of SOM as an indicator to determine the sustainability of different land uses (native vegetation, secondary vegetation, fruit orchards, horticultural areas, degraded pasture, improved pasture, and fields with annual crops) in the eastern Amazon. Improved pasture had higher soil C stock than the other land uses and was similar to the native vegetation, and also presented the highest quantity of C in a stable form in the soil (fraction < 53 ìm). According to the C management index, improved pasture is the most similar in use to native vegetation. Changes in land use reduced the soil microbial C content, although the more conservationist systems (fruit orchards, secondary vegetation, and improved pasture) had contents similar to those of the native vegetation. The highest soil microbial quotients were found in fruit orchards and horticultural areas. Well-managed pastures were effective in accumulating C as stable forms in the soil, which demonstrates the sustainability of this land use in the region studied. |
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Palavras-Chave: |
Biomassa microbiana; Carbon management index; Carbon stocks; Changes in land use; Estoque de carbono; Fracionamento físico; Indice de gerenciamento de carbono; Mudanças no uso da terra; Physical fractionation; Sustentabilidade. |
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Thesagro: |
Matéria Orgânica; Pastagem nativa; Solo; Uso da Terra. |
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Thesaurus NAL: |
Microbial biomass. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/174161/1/Diana-2018-2.pdf
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Marc: |
LEADER 02394naa a2200361 a 4500
001 2089385
005 2019-01-24
008 2018 bl uuuu u00u1 u #d
022 $a1678-992X
024 7 $a10.1590/1678-992X-2016-0089$2DOI
100 1 $aSIGNOR, D.
245 $aQuantity and quality of soil organic matter as a sustainability index different land uses in eastern Amazon.$h[electronic resource]
260 $c2018
520 $aSoil organic matter (SOM), which influences chemical, physical and biological soil attributes, is the main form of C found in the soil which can also be used as a soil sustainability index. The aim of this study was to use the quantity and quality of SOM as an indicator to determine the sustainability of different land uses (native vegetation, secondary vegetation, fruit orchards, horticultural areas, degraded pasture, improved pasture, and fields with annual crops) in the eastern Amazon. Improved pasture had higher soil C stock than the other land uses and was similar to the native vegetation, and also presented the highest quantity of C in a stable form in the soil (fraction < 53 ìm). According to the C management index, improved pasture is the most similar in use to native vegetation. Changes in land use reduced the soil microbial C content, although the more conservationist systems (fruit orchards, secondary vegetation, and improved pasture) had contents similar to those of the native vegetation. The highest soil microbial quotients were found in fruit orchards and horticultural areas. Well-managed pastures were effective in accumulating C as stable forms in the soil, which demonstrates the sustainability of this land use in the region studied.
650 $aMicrobial biomass
650 $aMatéria Orgânica
650 $aPastagem nativa
650 $aSolo
650 $aUso da Terra
653 $aBiomassa microbiana
653 $aCarbon management index
653 $aCarbon stocks
653 $aChanges in land use
653 $aEstoque de carbono
653 $aFracionamento físico
653 $aIndice de gerenciamento de carbono
653 $aMudanças no uso da terra
653 $aPhysical fractionation
653 $aSustentabilidade
700 1 $aDEON, M. D.
700 1 $aCAMARGO, P. B. de
700 1 $aCERRI, C. E. P.
773 $tScientia Agrícola, Piracicaba$gv. 75, n. 3, p. 225-232, may/jun. 2018.
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