Litter mercury deposition in the Amazonian rainforest

Autor(es)

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

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: Environmental Pollution; v. 206, p. 605-610, NOV 2015.
• Citações Web of Science: 14

Resumo

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 Calculations were based on a large survey of published and unpublished data on litterfall and Hg concentrations in litterfall samples from the Amazonian region.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)

• Processo FAPESP: 08/04490-4 - Combustão de biomassa de florestas tropicais
• Beneficiário: João Andrade de Carvalho Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/19040-4 - Impacto do deflorestamento sobre as emissões de mercúrio em floresta tropical da região amazônica
• Beneficiário: Anne Helene Fostier
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/00555-5 - Emissões de mercúrio provenientes do solo e serrapilheira durante a queima de floresta
• Beneficiário: Larissa Richter
• Modalidade de apoio: Bolsas no Brasil - Mestrado