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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
17/11/2020 |
Data da última atualização: |
26/11/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SMITH, M. N.; TAYLOR, T. C.; HAREN, J. van; ROSOLEM, R.; RESTREPO-COUPE, N.; ADAMS, J.; WU, J.; OLIVEIRA JUNIOR, R. C. de; SILVA, R. da; ARAUJO, A. C. de; CAMARGO, P. B. de; HUXMAN, T. E.; SALESKA, S. R. |
Afiliação: |
Marielle N. Smith, University of Arizona / Michigan State University; Tyeen C. Taylor, University of Arizona / University of Michigan; Joost van Haren, University of Arizona; Rafael Rosolem, University of Bristol; Natalia Restrepo-Coupe, University of Arizona / University of Technology Sydney; John Adams, University of Arizona; Jin Wu, The University of Hong Kong; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; Rodrigo da Silva, UFOPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU / INPA; Plinio B. de Camargo, CENA/USP; Travis E. Huxman, University of California; Scott R. Saleska, University of Arizona. |
Título: |
Empirical evidence for resilience of tropical forest photosynthesis in a warmer world. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Nature Plants, v. 6, p. 1225-1230, 2020. |
DOI: |
https://doi.org/10.1038/s41477-020-00780-2 |
Idioma: |
Inglês |
Conteúdo: |
Tropical forests may be vulnerable to climate change if photosynthetic carbon uptake currently operates near a high temperature limit. Predicting tropical forest function requires understanding the relative contributions of two mechanisms of high-temperature photosynthetic declines: stomatal limitation (H1), an indirect response due to temperature-associated changes in atmospheric vapour pressure deficit (VPD), and biochemical restrictions (H2), a direct temperature response. Their relative control predicts different outcomes-H1 is expected to diminish with stomatal responses to future co-occurring elevated atmospheric [CO2], whereas H2 portends declining photosynthesis with increasing temperatures. Distinguishing the two mechanisms at high temperatures is therefore critical, but difficult because VPD is highly correlated with temperature in natural settings. We used a forest mesocosm to quantify the sensitivity of tropical gross ecosystem productivity (GEP) to future temperature regimes while constraining VPD by controlling humidity. We then analytically decoupled temperature and VPD effects under current climate with flux-tower-derived GEP trends in situ from four tropical forest sites. Both approaches showed consistent, negative sensitivity of GEP to VPD but little direct response to temperature. Importantly, in the mesocosm at low VPD, GEP persisted up to 38°C, a temperature exceeding projections for tropical forests in 2100 (ref.). If elevated [CO2] mitigates VPD-induced stomatal limitation through enhanced water-use efficiency as hypothesized, tropical forest photosynthesis may have a margin of resilience to future warming. MenosTropical forests may be vulnerable to climate change if photosynthetic carbon uptake currently operates near a high temperature limit. Predicting tropical forest function requires understanding the relative contributions of two mechanisms of high-temperature photosynthetic declines: stomatal limitation (H1), an indirect response due to temperature-associated changes in atmospheric vapour pressure deficit (VPD), and biochemical restrictions (H2), a direct temperature response. Their relative control predicts different outcomes-H1 is expected to diminish with stomatal responses to future co-occurring elevated atmospheric [CO2], whereas H2 portends declining photosynthesis with increasing temperatures. Distinguishing the two mechanisms at high temperatures is therefore critical, but difficult because VPD is highly correlated with temperature in natural settings. We used a forest mesocosm to quantify the sensitivity of tropical gross ecosystem productivity (GEP) to future temperature regimes while constraining VPD by controlling humidity. We then analytically decoupled temperature and VPD effects under current climate with flux-tower-derived GEP trends in situ from four tropical forest sites. Both approaches showed consistent, negative sensitivity of GEP to VPD but little direct response to temperature. Importantly, in the mesocosm at low VPD, GEP persisted up to 38°C, a temperature exceeding projections for tropical forests in 2100 (ref.). If elevated [CO2] mitigates VPD-induce... Mostrar Tudo |
Thesagro: |
Floresta Tropical; Fotossíntese. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 02529naa a2200301 a 4500 001 2126677 005 2020-11-26 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1038/s41477-020-00780-2$2DOI 100 1 $aSMITH, M. N. 245 $aEmpirical evidence for resilience of tropical forest photosynthesis in a warmer world.$h[electronic resource] 260 $c2020 520 $aTropical forests may be vulnerable to climate change if photosynthetic carbon uptake currently operates near a high temperature limit. Predicting tropical forest function requires understanding the relative contributions of two mechanisms of high-temperature photosynthetic declines: stomatal limitation (H1), an indirect response due to temperature-associated changes in atmospheric vapour pressure deficit (VPD), and biochemical restrictions (H2), a direct temperature response. Their relative control predicts different outcomes-H1 is expected to diminish with stomatal responses to future co-occurring elevated atmospheric [CO2], whereas H2 portends declining photosynthesis with increasing temperatures. Distinguishing the two mechanisms at high temperatures is therefore critical, but difficult because VPD is highly correlated with temperature in natural settings. We used a forest mesocosm to quantify the sensitivity of tropical gross ecosystem productivity (GEP) to future temperature regimes while constraining VPD by controlling humidity. We then analytically decoupled temperature and VPD effects under current climate with flux-tower-derived GEP trends in situ from four tropical forest sites. Both approaches showed consistent, negative sensitivity of GEP to VPD but little direct response to temperature. Importantly, in the mesocosm at low VPD, GEP persisted up to 38°C, a temperature exceeding projections for tropical forests in 2100 (ref.). If elevated [CO2] mitigates VPD-induced stomatal limitation through enhanced water-use efficiency as hypothesized, tropical forest photosynthesis may have a margin of resilience to future warming. 650 $aFloresta Tropical 650 $aFotossíntese 700 1 $aTAYLOR, T. C. 700 1 $aHAREN, J. van 700 1 $aROSOLEM, R. 700 1 $aRESTREPO-COUPE, N. 700 1 $aADAMS, J. 700 1 $aWU, J. 700 1 $aOLIVEIRA JUNIOR, R. C. de 700 1 $aSILVA, R. da 700 1 $aARAUJO, A. C. de 700 1 $aCAMARGO, P. B. de 700 1 $aHUXMAN, T. E. 700 1 $aSALESKA, S. R. 773 $tNature Plants$gv. 6, p. 1225-1230, 2020.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registros recuperados : 8 | |
2. | | HAREN, J. van; SALESKA, S.; HUETE, A.; KELLER, M.; OLIVEIRA, R. C. Amazon forest tree species composition influences soil fluxes of CO2 and N2O. In: SCIENCE TEAM MEETING, 10., 2006, Brasília, DF. Book of Abstracts... Manaus: LBA-ECO, 2006. p. 19.Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Amazônia Oriental. |
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3. | | OLIVEIRA JUNIOR, R. C.; KELLER, M.; CRILL, P.; BELDINI, T.; HAREN, J. van; CAMARGO, P. Trace gas fluxes from intensively managed rice and soybean fields across three growing seasons in the Brazilian Amazon. African Journal of Agricultural Research, v. 10, n. 39, p. 3748-3758, Sep. 2015.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
Biblioteca(s): Embrapa Amazônia Oriental. |
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4. | | OLIVEIRA JUNIOR, R. C. de; KELLER, M.; CRILL, P.; BELDINI, T. P.; CAMARGO, P.; HAREN, J. van. Trace gas fluxes from intensively managed rice and soybean fields across three growing seasons in the brazilian amazon. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 35., 2015, Natal. O solo e suas múltiplas funções: anais. Natal: Sociedade Brasileira de Ciência do Solo, 2015.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Amazônia Oriental. |
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5. | | OLIVEIRA JUNIOR, R. C. de; KELLER, M. M.; RAMOS, J. F. da F.; BELDINI, T. P.; CRILL, P. M.; CAMARGO, P. B. de; HAREN, J. van. Chemical analysis of rainfall and throughfall in the Tapajós National Forest, Belterra, Pará, Brazil. Revista Ambiente & Água, v. 10, n. 2, p. 263-285, abr./jun. 2015.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Territorial. |
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6. | | SMITH, M. N.; TAYLOR, T. C.; HAREN, J. van; ROSOLEM, R.; RESTREPO-COUPE, N.; ADAMS, J.; WU, J.; OLIVEIRA JUNIOR, R. C. de; SILVA, R. da; ARAUJO, A. C. de; CAMARGO, P. B. de; HUXMAN, T. E.; SALESKA, S. R. Empirical evidence for resilience of tropical forest photosynthesis in a warmer world. Nature Plants, v. 6, p. 1225-1230, 2020.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Amazônia Oriental. |
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7. | | OLIVEIRA JUNIOR, R. C. de; HAREN, J. van; HOVLAND, L.; WOODCOCK, T.; SILVA, R. de N. P. da; VASCONCELLOS, E. B. de C.; FERREIRA, M. L.; PEREIRA, A. L.; METCALFE, D. B.; CATTANIO, J. H.; COSTA, A. C. L. da; FERREIRA, L. V.; SALESKA, S.; CAMARGO, P. B. de. Soil CO2, CH4 and N2O fluxes from Eastern Amazonia indicate surprising controls on n-cycling in a drought experiment and terra preta soils. In: LISBOA, P. L. B. (Org.). Caxiuanã: paraíso ainda preservado. Belém, PA: MPEG, 2013. p. 147-158.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Amazônia Oriental. |
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8. | | SMITH, M. N.; STARK, S. C.; TAYLOR, T. C.; SCHIETTI, J.; ALMEIDA, D. R. A. de; ARAGÓN, S.; TORRALVO, K.; LIMA, A. P.; OLIVEIRA, G. de; ASSIS, R. L. de; LEITOLD, V.; PONTES-LOPES, A.; SCOLES, R.; VIEIRA, L. C. de S.; RESENDE, A. F.; COPPOLA, A. I.; BRANDÃO, D. O.; SILVA JUNIOR, J. de A.; LOBATO, L. F.; FREITAS, W.; ALMEIDA, D.; SOUZA, M. S.; MINOR, D. M.; VILLEGAS, J. C.; LAW, D. J.; GONÇALVES, N.; ROCHA, D. G. da; GUEDES, M. C.; TONINI, H.; SILVA, K. E. da; HAREN, J. van; ROSA, D. M.; VALLE, D. F. do; CORDEIRO, C. L.; LIMA, N. Z. de; SHAO, G.; MENOR, I. O.; CONTI, G.; FLORENTINO, A. P.; MONTTI, L.; ARAGÃO, L. E. O. C.; McMAHON, S. M.; PARKER, G. G.; BRESHEARS, D. D.; COSTA, A. C. L. da; MAGNUSSON, W. E.; MESQUITA, R.; CAMARGO, J. L. C.; OLIVEIRA JUNIOR, R. C. de; CAMARGO, P. B. de; SALESKA, S. R.; NELSON, B. W. Diverse anthropogenic disturbances shift Amazon forests along a structural spectrum. Frontiers in Ecology an the Environment, v. 21, n. 1, p. 24-32, 2023.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
Biblioteca(s): Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Pecuária Sul. |
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Registros recuperados : 8 | |
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Nenhum registro encontrado para a expressão de busca informada. |
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