globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13851
论文题名:
Stand dynamics modulate water cycling and mortality risk in droughted tropical forest
作者: da Costa A.C.L.; Rowland L.; Oliveira R.S.; Oliveira A.A.R.; Binks O.J.; Salmon Y.; Vasconcelos S.S.; Junior J.A.S.; Ferreira L.V.; Poyatos R.; Mencuccini M.; Meir P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
语种: 英语
英文关键词: Drought ; Sap flux ; Transpiration ; Tree mortality ; Tropical forest ; Water cycling
英文摘要: 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, drought-related 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. © 2017 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61132
Appears in Collections:影响、适应和脆弱性

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作者单位: Instituto de Geosciências Universidade Federal do Pará Belém Brasil; Department of Geography College of Life and Environmental Sciences University of Exeter Exeter UK; Instituto de Biologia UNICAMP Campinas Brasil; Museu Paraense Emílio Goeldi Belém Brasil; Research School of Biology Australian National University Canberra Australia; Department of Physics University of Helsinki Helsinki Finland; EMBRAPA Amazônia Oriental Belém Brasil; CREAF, Campus UAB Cerdanyola del Vallés Spain; Laboratory of Plant Ecology Faculty of Bioscience Engineering Ghent University Ghent Belgium; ICREA Barcelona Spain; School of GeoSciences University of Edinburgh Edinburgh UK

Recommended Citation:
da Costa A.C.L.,Rowland L.,Oliveira R.S.,et al. Stand dynamics modulate water cycling and mortality risk in droughted tropical forest[J]. Global Change Biology,2017-01-01
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