1. Dynamics, distribution, and transformations of mercury species from pyrenean high-altitude lakes
- Author
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Bastien Duval, Emmanuel Tessier, Leire Kortazar, Luis Angel Fernandez, Alberto de Diego, and David Amouroux
- Subjects
Lakes ,Altitude ,Water ,Mercury ,Gases ,Methylmercury Compounds ,Biochemistry ,Ecosystem ,Water Pollutants, Chemical ,Environmental Monitoring ,General Environmental Science - Abstract
While mercury (Hg) is a major concern in all aquatic environments because of its methylation and biomagnification pathways, very few studies consider Hg cycling in remote alpine lakes which are sensitive ecosystems. Nineteen high-altitude pristine lakes from Western/Central Pyrenees were investigated on both northern (France) and southern (Spain) slopes (1620-2600 m asl.). Subsurface water samples were collected in June 2017/2018/2019 and October 2017/2018 for Hg speciation analysis of inorganic mercury (iHg(II)), monomethylmercury (MMHg), and dissolved gaseous mercury (DGM) to investigate spatial and seasonal variations. In June 2018/2019 and October 2018, more comprehensive studies were performed in four lakes by taking water column depth profiles. Besides, in-situ incubation experiments using isotopically enriched Hg species (
- Published
- 2023