Skip to Main content Skip to Navigation
Journal articles

Hg isotopic composition of one-year-old spruce shoots: Application to long-term Hg atmospheric monitoring in Germany

Abstract : The Hg isotopic composition of 1-year-old Norway spruce (Picea abies) shoots collected from Saarland cornurbation Warndt, Germany, since 1985 by the German Environmental Specimen Bank, were measured for a better understanding of the temporal trends of Hg sources. The isotopic data showed that Hg was mainly taken up as gaseous element mercury (GEM) and underwent oxidation in the spruce needles; this led to a significant decrease in the δ202Hg compared with the atmospheric Hg isotopic composition observed for deciduous leaves and epiphytic lichens. Observation of the odd mass-independent isotopic fractionation (MIF) indicated that Δ199Hg and Δ201Hg were close to but slightly lower than the actual values recorded from the atmospheric measurement of the GEM isotopic composition in non-contaminated sites in U.S. and Europe, whereas observation of the even-MIF indicated almost no differences for Δ200Hg. This confirmed that GEM is a major source of Hg accumulation in spruce shoots. Interestingly, the Hg isotopic composition in the spruce shoots did not change very significantly during the study period of >30 years, even as the Hg concentration decreased significantly. Even-MIF (Δ200Hg) and mass-dependent fractionation (MDF) (δ202Hg) of the Hg isotopes exhibited slight decrease with time, whereas odd-MIF did not show any clear trend. These results suggest a close link between the long-term evolution of GEM isotopic composition in the air and the isotopic composition of bioaccumulated Hg altered by mass-dependent fraction in the spruce shoots.
Document type :
Journal articles
Complete list of metadata
Contributor : Hal Iprem Connect in order to contact the contributor
Submitted on : Tuesday, July 6, 2021 - 9:04:53 PM
Last modification on : Friday, April 1, 2022 - 3:45:55 AM
Long-term archiving on: : Thursday, October 7, 2021 - 7:18:13 PM


Publisher files allowed on an open archive


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License




Akane Yamakawa, David Amouroux, Emmanuel Tessier, Ina Fettig, Sylvain Bérail, et al.. Hg isotopic composition of one-year-old spruce shoots: Application to long-term Hg atmospheric monitoring in Germany. Chemosphere, Elsevier, 2021, 279, pp.130631. ⟨10.1016/j.chemosphere.2021.130631⟩. ⟨hal-03279741⟩



Record views


Files downloads