气候变化领域集成服务门户(CCPortal): Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests

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DOI	10.1073/pnas.2019377118
	Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests
	Berenguer E.; Lennox G.D.; Ferreira J.; Malhi Y.; Aragão L.E.O.C.; Barreto J.R.; Del Bon Espírito-Santo F.; Figueiredo A.E.S.; França F.; Gardner T.A.; Joly C.A.; Palmeira A.F.; Quesada C.A.; Rossi L.C.; de Seixas M.M.M.; Smith C.C.; Withey K.; Barlow J.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:30
英文摘要	With humanity facing an unprecedented climate crisis, the conservation of tropical forests has never been so important – their vast terrestrial carbon stocks can be turned into emissions by climatic and human disturbances. However, the duration of these effects is poorly understood, and it is unclear whether impacts are amplified in forests with a history of previous human disturbance. Here, we focus on the Amazonian epicenter of the 2015–16 El Niño, a region that encompasses 1.2% of the Brazilian Amazon. We quantify, at high temporal resolution, the impacts of an extreme El Niño (EN) drought and extensive forest fires on plant mortality and carbon loss in undisturbed and human-modified forests. Mortality remained higher than pre-El Niño levels for 36 mo in EN-drought–affected forests and for 30 mo in EN-fire–affected forests. In EN-fire–affected forests, human disturbance significantly increased plant mortality. Our investigation of the ecological and physiological predictors of tree mortality showed that trees with lower wood density, bark thickness and leaf nitrogen content, as well as those that experienced greater fire intensity, were more vulnerable. Across the region, the 2015–16 El Niño led to the death of an estimated 2.5 ± 0.3 billion stems, resulting in emissions of 495 ± 94 Tg CO2. Three years after the El Niño, plant growth and recruitment had offset only 37% of emissions. Our results show that limiting forest disturbance will not only help maintain carbon stocks, but will also maximize the resistance of Amazonian forests if fires do occur.* © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Amazon; Degradation; El Niño; Forest fires; Logging
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238460
作者单位	Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom; Embrapa Amazônia Oriental, Belém, 66095-100, Brazil; Programa de Pós-Graduação em Ecologia e Programa de Pós-Graduação em Ciências Ambientais, Universidade Federal do Pará, Belém, 66075-10, Brazil; Remote Sensing Division, National Institute for Space Research, São José dos Campos, 12227-010, Brazil; College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4RJ, United Kingdom; Laboratório de Ecologia de Paisagens e Conservação, Departamento de Ecologia, Universidade de São Paulo, São Paulo, 05508-090, Brazil; Institute of Space and Earth Observation Science at Space Park Leicester, Centre for Landscape and Climate Research, School of Geography, Geology and Environment, University of Leicester, Leicester, LE1 7RH, United Kingdom; Faculdade de Filosofia, Ciências e Letras de...
推荐引用方式 GB/T 7714	Berenguer E.,Lennox G.D.,Ferreira J.,et al. Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests[J],2021,118(30).
APA	Berenguer E..,Lennox G.D..,Ferreira J..,Malhi Y..,Aragão L.E.O.C..,...&Barlow J..(2021).Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests.Proceedings of the National Academy of Sciences of the United States of America,118(30).
MLA	Berenguer E.,et al."Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests".Proceedings of the National Academy of Sciences of the United States of America 118.30(2021).