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

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

in 704/172/169/895 / 704/172/4081 / 704/47/4112 / Air pollution / Animals / Atmosphere - analysis / Atmosphere - chemistry / Atmospheric composition / Birds - classification / Birds - metabolism / Canopies / Coal mining / Dimethylmercury / Emissions / Environmental Monitoring - methods / Environmental Pollutants - analysis / Environmental Pollution - analysis / Feathers - chemistry / Foliage / Forests / Gases - analysis / Geography / Gold / Gold mines & mining / Humanities and Social Sciences / Leaf area / Mercury / Mercury (metal) / Mercury - analysis / Mercury pollution / Methylmercury / Mining / multidisciplinary / Peru / Plant Leaves - chemistry / Plant Leaves - metabolism / Rainforest / Science / Science (multidisciplinary) / Soil - chemistry / Soil Pollutants - analysis / Soil Pollutants - metabolism / Soils / Songbirds / Toxins

2022

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

2022

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2022

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Journal Article

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

Bergquist, Bridget,

Gerson, Jacqueline R.,

Silman, Miles,

Watsa, Mrinalini,

Zambrano, Angelica Almeyda,

Lansdale, Kelsey N.,

Purizaca, Raúl Pérez,

Marchese, Melissa J.,

Fernandez, Luis E.,

Broadbent, Eben,

Szponar, Natalie,

Evers, David C.,

Pan, William K.,

Sánchez, Victor,

Vega, Claudia,

Erkenswick, Gideon,

Hsu-Kim, Heileen,

Moore, Caroline,

Driscoll, Charles T.,

Martinez, Ari,

Ury, Emily A.,

Inga, Giancarlo,

Bernhardt, Emily S.

2022

Overview

Mercury emissions from artisanal and small-scale gold mining throughout the Global South exceed coal combustion as the largest global source of mercury. We examined mercury deposition and storage in an area of the Peruvian Amazon heavily impacted by artisanal gold mining. Intact forests in the Peruvian Amazon near gold mining receive extremely high inputs of mercury and experience elevated total mercury and methylmercury in the atmosphere, canopy foliage, and soils. Here we show for the first time that an intact forest canopy near artisanal gold mining intercepts large amounts of particulate and gaseous mercury, at a rate proportional with total leaf area. We document substantial mercury accumulation in soils, biomass, and resident songbirds in some of the Amazon’s most protected and biodiverse areas, raising important questions about how mercury pollution may constrain modern and future conservation efforts in these tropical ecosystems. The Peruvian Amazon is facing the highest known input of mercury pollution of any ecosystem globally. Intact forests located near artisanal gold mining are particularly at risk from this toxin.

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Publisher

Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio

Subject

/ Animals

/ Atmosphere - analysis

/ Atmosphere - chemistry