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Tracking the impacts of El Niño drought and fire in human-modified Amazonian forests

2021; National Academy of Sciences; Volume: 118; Issue: 30 Linguagem: Inglês

10.1073/pnas.2019377118

1091-6490

Érika Berenguer, Gareth D. Lennox, Joice Ferreira, Yadvinder Malhi, Luiz E. O. C. Aragão, Júlia Barreto, Fernando Del Bon Espírito-Santo, Axa Emanuelle Simões Figueiredo, Filipe França, Toby Gardner, Carlos Alfredo Joly, Alessandro Ferraz Palmeira, Carlos Alberto Quesada, Liana Chesini Rossi, Marina Maria Moraes de Seixas, Charlotte C. Smith, Kieran Daniel Withey, Jos Barlow,

Plant Water Relations and Carbon Dynamics

Significance Amazonia is experiencing an increase in the frequency of extreme droughts and wildfires. However, the duration of their impacts on plant mortality and carbon stocks are poorly known, and it is unclear whether impacts are amplified in forests with a history of previous human disturbance. We show that plant mortality rates remain above baseline levels for over 3 y in forests affected by drought and 2.5 y in forests affected by both drought and fire. A history of human disturbance led to greater plant mortality in forests simultaneously affected by drought and fire. Our assessment of an area covering 1.2% of the Brazilian Amazon shows that regional drought and fires can have globally relevant impacts on the world’s carbon balance.