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Comparison of the Isotopic Composition of Hg and Pb in Two Atmospheric Bioaccumulators in a Pyrenean Beech Forest (Iraty Forest, Western Pyrenees, France/Spain)

dc.contributor.authorBARRE, Julien
dc.contributor.authorQUEIPO-ABAD, Silvia
dc.contributor.authorSOLA-LARRAÑAGA, Cristina
dc.contributor.authorDELETRAZ, Gaëlle
hal.structure.identifierInstitut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
dc.contributor.authorBÉRAIL, Sylvain
hal.structure.identifierInstitut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
dc.contributor.authorTESSIER, Emmanuel
dc.contributor.authorELUSTONDO, David
dc.contributor.authorSANTAMARIA, Jesus Miguel
dc.contributor.authorDE DIEGO, Alberto
hal.structure.identifierInstitut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux [IPREM]
dc.contributor.authorAMOUROUX, David
dc.date.issued2020
dc.identifier.issn2296-665X
dc.description.abstractEnMercury (Hg) and lead (Pb) isotopic compositions were investigated in mosses and lichenscollected in a large mountainous beech forest (Iraty Forest) located on the French-SpanishPyrenean border. Hg isotopic signature in topsoil samples were also analyzed in selectedsampling sites. This is the firstwork that uses the complementary information of both isotopicsystems in two distinct atmospheric bioaccumulators. Mosses and lichens presentcharacteristic accumulation due to their integration times, displaying different on metal pollution over the area. Hg and Pb concentrations in annualmoss shoots represent recent atmospheric accumulation, while whole lichen thalli integrates a process of accumulation over a longer period. Lead isotope ratios in mosses are consistent with reported data corresponding to the actual European atmospheric background (206Pb/207Pb ∼ 1.158), while Hg isotopic composition reflects potential uptake of both dry and wet Hg depositions. For lichens, Pb isotopic composition exhibits the contribution of a longer integration period of both industrial Pb emissions and legacy of leaded gasoline pollution. Hg isotopes in lichens discriminate two main groups: a larger one representing the background atmospheric contribution and a second one corresponding to unexpected higher Hg content. The similarities in odd and even Mass-independent fractionation of Hg isotopes between topsoils and lichens from the larger group, support the idea that foliage uptake is the main input of Hg in soils. The second group of lichens exhibits more negative δ202Hg (down to –4.69‰) suggesting a new source of fractionation in this area, probably related to lichens aging and/or stubble and grass fires due to pastoral activities. This study demonstrates that using both Hg and Pb isotopic signature in lichens and mosses allows to trace atmospheric sources and environmental pathways of these metals in forested ecosystems. This original data set in a remote environment provides also new information on the fate of atmospheric Pb and Hg depositions.
dc.language.isoen
dc.publisherFrontiers
dc.subject.enbioaccumulator
dc.subject.enlichens
dc.subject.enmosses
dc.subject.ensoils
dc.subject.enmercury
dc.subject.enlead
dc.subject.enisotopes
dc.subject.enforest ecosystem
dc.title.enComparison of the Isotopic Composition of Hg and Pb in Two Atmospheric Bioaccumulators in a Pyrenean Beech Forest (Iraty Forest, Western Pyrenees, France/Spain)
dc.typeArticle de revue
dc.identifier.doi10.3389/fenvc.2020.582001
dc.subject.halSciences de l'environnement
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halChimie
bordeaux.journalFrontiers in Environmental Science
bordeaux.volume1
bordeaux.peerReviewedoui
hal.identifierhal-03018945
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03018945v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Frontiers%20in%20Environmental%20Science&rft.date=2020&rft.volume=1&rft.eissn=2296-665X&rft.issn=2296-665X&rft.au=BARRE,%20Julien&QUEIPO-ABAD,%20Silvia&SOLA-LARRA%C3%91AGA,%20Cristina&DELETRAZ,%20Ga%C3%ABlle&B%C3%89RAIL,%20Sylvain&rft.genre=article


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