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| 4. |  | ARAÚJO, A. C. G. de. Congresso internacional discutirá novidades científicas relacionadas à reprodução em plantas e suas aplicações nas questões agropecuárias e florestais. In: SANTOS, M. G. B. dos. (Org). Artigos técnicos divulgados na mídia: coletânea 2007. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2007. (Embrapa Recursos Genéticos e Biotecnologia. Documentos, 244). Publicado em 19/12/2007. Disponível em: Ripa, ripa191207; Clicnews, clicnews141207; Agrosoft, agrosoft141207; Pets, pets191207a; Hotel Virtual, hvirtual141207.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 15. | | ARAÚJO, A. C. G.; FALCÃO, R.; CARNEIRO, V. T. C. Altered female gamatogenesis in the diploid sexual acession of Brachiaria brizantha (Poaceae). In: SIMPÓSIO BRASILEIRO DE BIOLOGIA CELULAR VEGETAL, 1., 2005, Teresópolis, RJ. Anais... Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2005. 1 CD-ROM. (Embrapa Recursos Genéticos e Biotecnologia. Documentos, 139).| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 16. | | FALCÃO, R.; SIMÕES, K. C.; ARAUJO, A. C. G. Aspectos reprodutivos de acessos apomíticos facultativos de Brachiaria brizantha (Poaceae). In: CONGRESSO NACIONAL DE BOTÂNICA, 55.; REUNIÃO REGIONAL DE BOTÂNICOS DE MG, BA E ES, 26., 2004, Viçosa. Conservação, bioprospecção e biotecnologia: [resumos]. Viçosa: Sociedade Botânica do Brasil: Universidade Federal Viçosa, 2004.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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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. |
Registro Completo
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
04/12/2023 |
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Data da última atualização: |
04/12/2023 |
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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: |
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. |
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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. |
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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. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Environmental Research Letters, v. 17, n. 6, 064023, 2022. |
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DOI: |
https://doi.org/10.1088/1748-9326/ac6f6d |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Ciclo da água; Soil moisture; Water cycle. |
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Thesagro: |
Evapotranspiração; Floresta Tropical; Seca; Umidade do Solo. |
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Thesaurus NAL: |
Drought; Evapotranspiration; Tropical forests. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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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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