Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2019377118 |
Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests | |
Erika Berenguer; Gareth D. Lennox; Joice Ferreira; Yadvinder Malhi; Luiz E. O. C. Aragão; Julia Rodrigues Barreto; Fernando Del Bon Espírito-Santo; Axa Emanuelle S. Figueiredo; Filipe França; Toby Alan Gardner; Carlos A. Joly; Alessandro F. Palmeira; Carlos Alberto Quesada; Liana Chesini Rossi; Marina Maria Moraes de Seixas; Charlotte C. Smith; Kieran Withey; Jos Barlow | |
2021-07-27 | |
发表期刊 | Proceedings of the National Academy of Sciences |
出版年 | 2021 |
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.* |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/334058 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Erika Berenguer,Gareth D. Lennox,Joice Ferreira,et al. Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Erika Berenguer.,Gareth D. Lennox.,Joice Ferreira.,Yadvinder Malhi.,Luiz E. O. C. Aragão.,...&Jos Barlow.(2021).Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests.Proceedings of the National Academy of Sciences. |
MLA | Erika Berenguer,et al."Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests".Proceedings of the National Academy of Sciences (2021). |
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