Data/hora: 24/06/2024 05:45:13

Biblioteca(s): | Embrapa Amazônia Oriental.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 02/01/2018
Data da última atualização: | 02/05/2018
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
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (54505-1) - UPC - AP - DD -  -  -  - DIS