Environmental Studies and Forestry

Amazon forests capture high levels of atmospheric mercury pollution from artisanal gold mining

J. R. Gerson, N. Szponar, et al.

This study reveals alarming levels of mercury emissions from artisanal and small-scale gold mining in the Peruvian Amazon, showcasing how intact forest canopies capture significant amounts of mercury, affecting the atmosphere, soil, and local wildlife. The research by a team of experts underscores urgent conservation concerns in these fragile ecosystems.

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Abstract

Mercury emissions from artisanal and small-scale gold mining (ASGM) are a significant global pollution source. This study investigated mercury deposition and storage in a Peruvian Amazonian region heavily impacted by ASGM. Intact forests near mining sites showed extremely high mercury inputs, with elevated levels in the atmosphere, canopy, and soil. The research demonstrates that intact forest canopies intercept substantial amounts of mercury, proportional to leaf area. Significant mercury accumulation was found in soils, biomass, and songbirds, raising concerns about the impact of mercury pollution on conservation efforts in these ecosystems.

Publisher

Nature Communications

Published On

Jan 28, 2022

Authors

Jacqueline R. Gerson, Natalie Szponar, Angelica Almeyda Zambrano, Bridget Bergquist, Eben Broadbent, Charles T. Driscoll, Gideon Erkenswick, David C. Evers, Luis E. Fernandez, Heileen Hsu-Kim, Giancarlo Inga, Kelsey N. Lansdale, Melissa J. Marchese, Ari Martinez, Caroline Moore, William K. Pan, Raúl Pérez Purizaca, Victor Sánchez, Miles Silman, Emily A. Ury, Claudia Vega, Mrinalini Watsa, Emily S. Bernhardt

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