| |
|
|
 | 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. |
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
|
Data corrente: |
18/03/2008 |
|
Data da última atualização: |
18/03/2008 |
|
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
|
Autoria: |
DELIZA, R.; ROSENTHAL, A.; SLONGO, A. P.; MATHIAS, S. P.; ARAGÃO, G. M. F. de. |
|
Afiliação: |
Rosires Deliza, Embrapa Agroindústria de Alimentos; Amauri Rosenthal, Embrapa Agroindústria de Alimentos; Adriana Paula Slongo, FAPERJ-RJ; Simone Pereira Mathias, CAPES/UFRRJ; Gláucia Maria Falcão de Aragão, UFSC. |
|
Título: |
Perfil sensorial de presunto suíno submetido ao processo de alta pressão hidrostática. |
|
Ano de publicação: |
2007 |
|
Fonte/Imprenta: |
Rio de Janeiro: Embrapa Agroindústria de Alimentos, 2007. |
|
Série: |
(Embrapa Agroindústria de Alimentos. Comunicado Técnico, 116). |
|
ISSN: |
0103-5231 |
|
Idioma: |
Português |
|
Palavras-Chave: |
Alta pressão hidrostática; Análise sensorial; Presunto suíno. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 00675nam a2200205 a 4500
001 1413481
005 2008-03-18
008 2007 bl uuuu u0uu1 u #d
022 $a0103-5231
100 1 $aDELIZA, R.
245 $aPerfil sensorial de presunto suíno submetido ao processo de alta pressão hidrostática.
260 $aRio de Janeiro: Embrapa Agroindústria de Alimentos$c2007
490 $a(Embrapa Agroindústria de Alimentos. Comunicado Técnico, 116).
653 $aAlta pressão hidrostática
653 $aAnálise sensorial
653 $aPresunto suíno
700 1 $aROSENTHAL, A.
700 1 $aSLONGO, A. P.
700 1 $aMATHIAS, S. P.
700 1 $aARAGÃO, G. M. F. de
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agroindústria de Alimentos (CTAA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
