The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe - Archive ouverte HAL Access content directly
Journal Articles Water Research Year : 2018

The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe

Andrea Garcia Bravo
  • Function : Author
Dolly Kothawala
  • Function : Author
Katrin Attermeyer
  • Function : Author
Pascal Bodmer
  • Function : Author
José L.J. Ledesma
  • Function : Author
Joachim Audet
  • Function : Author
Joan Pere Casas-Ruiz
  • Function : Author
Nuria Catalan
  • Function : Author
Miriam Colls
  • Function : Author
Anne Deininger
  • Function : Author
Vesela Evtimova
  • Function : Author
Jérémy Fonvielle
  • Function : Author
Thomas Fuss
  • Function : Author
Peter Gilbert
  • Function : Author
Sonia Herrero Ortega
  • Function : Author
Liu Liu
  • Function : Author
Clara Mendoza-Lera
  • Function : Author
Juliana Monteiro
  • Function : Author
Jordi-René Mor
  • Function : Author
Magdalena Nagler
  • Function : Author
Georg Niedrist
  • Function : Author
Anna Nydahl
  • Function : Author
Ada Pastor
  • Function : Author
Josephine Pegg
  • Function : Author
Catherine Gutmann Roberts
  • Function : Author
Francesca Pilotto
  • Function : Author
Ana Paula Portela
  • Function : Author
Clara González-Quijano
  • Function : Author
Ferran Romero
  • Function : Author
Martin Rulík
  • Function : Author

Abstract

Large-​scale studies are needed to identify the drivers of total mercury (THg) and monomethyl-​mercury (MeHg) concns. in aquatic ecosystems. Studies attempting to link dissolved org. matter (DOM) to levels of THg or MeHg are few and geog. constrained. Addnl., stream and river systems have been understudied as compared to lakes. Hence, the aim of this study was to examine the influence of DOM concn. and compn., morphol. descriptors, land uses and water chem. on THg and MeHg concns. and the percentage of THg as MeHg (​%MeHg) in 29 streams across Europe spanning from 41°N to 64 °N. THg concns. (0.06-​2.78 ng L-​1) were highest in streams characterized by DOM with a high terrestrial soil signature and low nutrient content. MeHg concns. (7.8-​159 pg L-​1) varied non-​systematically across systems. Relationships between DOM bulk characteristics and THg and MeHg suggest that while soil derived DOM inputs control THg concns., autochthonous DOM (aquatically produced) and the availability of electron acceptors for Hg methylating microorganisms (e.g. sulfate) drive %MeHg and potentially MeHg concn. Overall, these results highlight the large spatial variability in THg and MeHg concns. at the European scale, and underscore the importance of DOM compn. on mercury cycling in fluvial systems.
Fichier principal
Vignette du fichier
Bravo et al 2018 final submission_REF.pdf (1.06 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01982331 , version 1 (03-11-2020)

Identifiers

Cite

Andrea Garcia Bravo, Dolly Kothawala, Katrin Attermeyer, Emmanuel Tessier, Pascal Bodmer, et al.. The interplay between total mercury, methylmercury and dissolved organic matter in fluvial systems: A latitudinal study across Europe. Water Research, 2018, 144, pp.172-182. ⟨10.1016/j.watres.2018.06.064⟩. ⟨hal-01982331⟩
511 View
49 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More