Litter mercury deposition in the Amazonian rainforest

Author(s)

Fostier, Anne Helene ^[1] ; Melendez-Perez, Jose Javier ^[1] ; Richter, Larissa ^[1]

Affiliation

^[1] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: Environmental Pollution; v. 206, p. 605-610, NOV 2015.
• Web of Science Citations: 14

Abstract

The objective of this work was to assess the flux of atmospheric mercury transferred to the soil of the Amazonian rainforest by litterfall. Calculations were based on a large survey of published and unpublished data on litterfall and Hg concentrations in litterfall samples from the Amazonian region. Litterfall based on 65 sites located in the Amazon rainforest averaged 8.15 +/- 2.25 Mg ha(-1) y(-1). Average Hg concentrations were calculated from nine datasets for fresh tree leaves and ten datasets for litter, and a median concentration of 60.5 ng Hg g(-1) was considered for Hg deposition in litterfall, which averaged 49 +/- 14 mu g m(-2) yr(-1). This value was used to estimate that in the Amazonian rainforest, litterfall would be responsible for the annual removing of 268 +/- 77 Mg of Hg, approximately 8% of the total atmospheric Hg deposition to land. The impact of the Amazon deforestation on the Hg biogeochemical cycle is also discussed. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 08/04490-4 - Combustion of tropical forest biomass
• Grantee: João Andrade de Carvalho Junior
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 10/19040-4 - Impact of deforestation on mercury emissions in tropical forest from the Amazonian region
• Grantee: Anne Helene Fostier
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/00555-5 - Mercury emissions from soil and litter during forest burning
• Grantee: Larissa Richter
• Support Opportunities: Scholarships in Brazil - Master