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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
02/01/2018 |
Data da última atualização: |
02/05/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
COSTA, A. C. L. da; ROWLAND, L.; OLIVEIRA, R. S.; OLIVEIRA, A. A. R.; BINKS, O. J.; SALMON, Y.; VASCONCELOS, S. S.; S. JUNIOR, J. A.; FERREIRA, L. V.; POYATOS, R.; MENCUCCINI, M.; MEIR, P. |
Afiliação: |
Antonio C. L. da Costa, UFPA; Lucy Rowland, University of Exeter; Rafael S. Oliveira, UNICAMP; Alex A. R. Oliveira, MPEG; Oliver J. Binks, Australian National University; Yann Salmon, University of Helsinki; STEEL SILVA VASCONCELOS, CPATU; João A. S. Junior, UFPA; Leandro V. Ferreira, MPEG; Rafael Poyatos, CREAF / Ghent University; Maurizio Mencuccini, CREF / ICREA; Patrick Meir, Australian National University / University of Edinburgh. |
Título: |
Stand dynamics modulate water cycling and mortality risk in droughted tropical forest. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Global Change Biology, v. 24, n. 1, p. 249-258, Jan. 2018. |
Idioma: |
Inglês |
Conteúdo: |
Transpiration from the Amazon rainforest generates an essential water source at a global and local scale. However, changes in rainforest function with climate change can disrupt this process, causing significant reductions in precipitation across Amazonia, and potentially at a global scale. We report the only study of forest transpiration following a long-term (>10 year) experimental drought treatment in Amazonian forest. After 15 years of receiving half the normal rainfall, droughtrelated tree mortality caused total forest transpiration to decrease by 30%. However, the surviving droughted trees maintained or increased transpiration because of reduced competition for water and increased light availability, which is consistent with increased growth rates. Consequently, the amount of water supplied as rainfall reaching the soil and directly recycled as transpiration increased to 100%. This value was 25% greater than for adjacent nondroughted forest. If these drought conditions were accompanied by a modest increase in temperature (e.g., 1.5°C), water demand would exceed supply, making the forest more prone to increased tree mortality. |
Thesagro: |
Balanço hídrico; Floresta tropical; Seca; Transpiração vegetal. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02011naa a2200301 a 4500 001 2084034 005 2018-05-02 008 2018 bl uuuu u00u1 u #d 100 1 $aCOSTA, A. C. L. da 245 $aStand dynamics modulate water cycling and mortality risk in droughted tropical forest.$h[electronic resource] 260 $c2018 520 $aTranspiration from the Amazon rainforest generates an essential water source at a global and local scale. However, changes in rainforest function with climate change can disrupt this process, causing significant reductions in precipitation across Amazonia, and potentially at a global scale. We report the only study of forest transpiration following a long-term (>10 year) experimental drought treatment in Amazonian forest. After 15 years of receiving half the normal rainfall, droughtrelated tree mortality caused total forest transpiration to decrease by 30%. However, the surviving droughted trees maintained or increased transpiration because of reduced competition for water and increased light availability, which is consistent with increased growth rates. Consequently, the amount of water supplied as rainfall reaching the soil and directly recycled as transpiration increased to 100%. This value was 25% greater than for adjacent nondroughted forest. If these drought conditions were accompanied by a modest increase in temperature (e.g., 1.5°C), water demand would exceed supply, making the forest more prone to increased tree mortality. 650 $aBalanço hídrico 650 $aFloresta tropical 650 $aSeca 650 $aTranspiração vegetal 700 1 $aROWLAND, L. 700 1 $aOLIVEIRA, R. S. 700 1 $aOLIVEIRA, A. A. R. 700 1 $aBINKS, O. J. 700 1 $aSALMON, Y. 700 1 $aVASCONCELOS, S. S. 700 1 $aS. JUNIOR, J. A. 700 1 $aFERREIRA, L. V. 700 1 $aPOYATOS, R. 700 1 $aMENCUCCINI, M. 700 1 $aMEIR, P. 773 $tGlobal Change Biology$gv. 24, n. 1, p. 249-258, Jan. 2018.
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1. | | ANGUS, A. A.; AGAPAKIS, C. M.; FONG, S.; YERRAPRAGADA, S.; ESTRADA-DE LOS SANTOS, P.; YANG, P.; SONG, N.; KANO, S; CABALLERO-MELLADO, J.; FARIA, S. M. de; DAKORA, F.; WEINSTOCK, G.; HIRSCH, A. M. Plant-associated symbiotic Burkholderia species lack hallmark strategies required in Mammalian pathogenesis. Plos One, v. 9, n. 1, p. 1-12, 2014Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
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