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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: |
17/11/2020 |
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Data da última atualização: |
26/11/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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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. |
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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. |
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Título: |
Empirical evidence for resilience of tropical forest photosynthesis in a warmer world. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Nature Plants, v. 6, p. 1225-1230, 2020. |
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DOI: |
https://doi.org/10.1038/s41477-020-00780-2 |
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Idioma: |
Inglês |
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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 |
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Thesagro: |
Floresta Tropical; Fotossíntese. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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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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Biblioteca |
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Origem |
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Registro Completo
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
06/10/2014 |
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Data da última atualização: |
20/03/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
PINHEIRO, D. A.; CAVERO, B. A. S.; VARGAS, L.; BRACCINI, G. L.; OLIVEIRA, M. S. B de; YOSHIOKA, E. T. O.; TAVARES-DIAS, M. |
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Afiliação: |
ELIANE TIE OBA YOSHIOKA, CPAF-AP; MARCOS TAVARES DIAS, CPAF-AP. |
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Título: |
Homeopatila 100® no desempenho zootécnico, infecções de brânquias, histologia hepática e parâmetros sanguíneos de tambaqui Colossoma macropomum. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: ENCONTRO BRASILEIRO DE PATOLOGISTAS DE ORGANISMOS AQUÁTICOS, 13., 2014, Aracaju. Anais.... Aracaju: ABRAPOA, 2014. 1 CD-ROM. ENBRAPOA. |
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Idioma: |
Português |
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Notas: |
MAN004. |
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Thesagro: |
Hematologia; Parasito de animal; Peixe de agua doce. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/109596/1/CPAF-AP-2014-Homeopatila-no-desempenho.pdf
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Marc: |
LEADER 00827nam a2200217 a 4500
001 1996614
005 2017-03-20
008 2014 bl uuuu u00u1 u #d
100 1 $aPINHEIRO, D. A.
245 $aHomeopatila 100® no desempenho zootécnico, infecções de brânquias, histologia hepática e parâmetros sanguíneos de tambaqui Colossoma macropomum.$h[electronic resource]
260 $aIn: ENCONTRO BRASILEIRO DE PATOLOGISTAS DE ORGANISMOS AQUÁTICOS, 13., 2014, Aracaju. Anais.... Aracaju: ABRAPOA, 2014. 1 CD-ROM. ENBRAPOA.$c2014
500 $aMAN004.
650 $aHematologia
650 $aParasito de animal
650 $aPeixe de agua doce
700 1 $aCAVERO, B. A. S.
700 1 $aVARGAS, L.
700 1 $aBRACCINI, G. L.
700 1 $aOLIVEIRA, M. S. B de
700 1 $aYOSHIOKA, E. T. O.
700 1 $aTAVARES-DIAS, M.
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