Mercury methylation in sediments of a Brazilian mangrove under different vegetation covers and salinities

Chemosphere
Diana Ciannella Martins de OliveiraJ R D Guimarães

Abstract

The presence and formation of methylmercury (MMHg), a highly toxic form of Hg, in mangrove ecosystems is poorly studied. Therefore the aim of this study was to evaluate mercury methylation potentials in sediment, litter and root samples (Avicennia shaueriana and Spartina alterniflora) from different regions of a mangrove ecosystem, as well as the influence of salinity on methylation. Sediment was sampled under different depths and in mangrove regions with different plant covers and salinities. All samples were incubated with (203)Hg and MM(203)Hg was extracted and measured by liquid scintillation. MMHg was formed in all samples and sites tested including plant roots and litter. Higher Hg methylation was found in the superficial fraction of sediments (0.47-7.82%). Infralittoral sandy sediment had low MMHg formation (0.44-1.61%). Sediment under Rhizophora mangle had lower MMHg formation (0.018-2.23%) than under A. shaueriana (0.2-4.63%) and Laguncularia racemosa (0.08-7.82). MMHg formation in sediment tended to increase with salinity but the differences were not significant. Therefore, MMHg formation occurs in different sites of mangrove ecosystems and may be an important threat that requires further study.

References

Sep 1, 1980·Bulletin of Environmental Contamination and Toxicology·J E Blum, R Bartha
Jun 1, 2000·Applied and Environmental Microbiology·J K KingF M Saunders
Jan 5, 2006·Applied and Environmental Microbiology·Emily J FlemingDouglas C Nelson
Mar 30, 2006·Environmental Science & Technology·Mélanie DesrosiersAlfonso Mucci
Oct 24, 2006·Applied and Environmental Microbiology·E J KerinR P Mason
Feb 16, 2007·Chemical Reviews·William F FitzgeraldChad R Hammerschmidt
Nov 30, 2007·Environmental Science & Technology·João CanárioRute Cesário
Feb 6, 2009·Environmental Science & Technology·Martin Tsz Ki TsuiEdward A Nater
May 30, 2009·Environmental Science & Technology·Mark Marvin-DipasqualeBritt D Hall
Apr 12, 2011·Journal of Environmental Sciences (China)·Hao WuHaoliang Lu
Jun 21, 2011·Environmental Toxicology and Chemistry·Jessica Dutton, Nicholas S Fisher
Aug 31, 2011·Environmental Science & Technology·Stéphanie HamelinDolors Planas
Dec 31, 2011·Environmental Science & Technology·Brian A BergamaschiWilliam H Orem
Feb 9, 2012·Environmental Science & Technology·Andrew M GrahamCynthia C Gilmour
Sep 20, 2012·Brazilian Journal of Biology = Revista Brasleira De Biologia·C C MarinhoF A Esteves
Jul 9, 2013·Ecotoxicology and Environmental Safety·Raquel Rose Silva CorreiaJean Remy Davée Guimarães

❮ Previous
Next ❯

Citations

May 21, 2020·Bulletin of Environmental Contamination and Toxicology·Hang LiChenghao Wu
Mar 31, 2020·Environmental Science and Pollution Research International·Lou Brou Cécile KouameClarisse Balland-Bolou-Bi
Oct 19, 2020·The Science of the Total Environment·Dandan DuanKe Pan
Mar 7, 2021·Environmental Science and Pollution Research International·Urszula KwasigrochKatarzyna Łukawska-Matuszewska
Feb 16, 2018·Ecotoxicology and Environmental Safety·Rasika KulkarniSmita Zinjarde

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

The Science of the Total Environment
Sérgio A Coelho-SouzaSandra M F O Azevedo
Bulletin of Environmental Contamination and Toxicology
J E Blum, R Bartha
© 2022 Meta ULC. All rights reserved