Mercury concentrations in fish from forest harvesting and fire‐impacted Canadian Boreal lakes compared using stable isotopes of nitrogen
Identifieur interne : 000928 ( Main/Exploration ); précédent : 000927; suivant : 000929Mercury concentrations in fish from forest harvesting and fire‐impacted Canadian Boreal lakes compared using stable isotopes of nitrogen
Auteurs : Edenise Garcia [Canada] ; Richard Carignan [Canada]Source :
- Environmental Toxicology and Chemistry [ 0730-7268 ] ; 2005-03.
Descripteurs français
- KwdFr :
- Animaux (MeSH), Arbres (MeSH), Canada (MeSH), Chaine alimentaire (MeSH), Conservation des ressources naturelles (MeSH), Eau douce (MeSH), Incendies (MeSH), Isotopes de l'azote (analyse), Mensurations corporelles (effets des médicaments et des substances chimiques), Mercure (analyse), Mercure (métabolisme), Muscles (composition chimique), Poissons (métabolisme), Polluants chimiques de l'eau (analyse), Polluants chimiques de l'eau (métabolisme), Surveillance de l'environnement (MeSH).
- MESH :
- analyse : Isotopes de l'azote, Mercure, Polluants chimiques de l'eau.
- composition chimique : Muscles.
- effets des médicaments et des substances chimiques : Mensurations corporelles.
- métabolisme : Mercure, Poissons, Polluants chimiques de l'eau.
- Pascal (Inist)
- Wicri :
English descriptors
- KwdEn :
- Animals (MeSH), Body Size (drug effects), Boreal zone, Canada (MeSH), Clear‐cut, Conservation of Natural Resources (MeSH), Ecotoxicology, Environmental Monitoring (MeSH), Fire, Fires (MeSH), Fish, Fishes (metabolism), Food Chain (MeSH), Forest logging, Fresh Water (MeSH), Insects (chemistry), Mercury, Mercury (analysis), Mercury (metabolism), Muscles (chemistry), Nitrogen, Nitrogen Isotopes (analysis), Nitrogen isotopes, Pisces, Trees (MeSH), Water Pollutants, Chemical (analysis), Water Pollutants, Chemical (metabolism), Wildfire.
- MESH :
- chemical , analysis : Mercury, Nitrogen Isotopes, Water Pollutants, Chemical.
- chemical , metabolism : Mercury, Water Pollutants, Chemical.
- geographic : Canada.
- chemistry : Insects, Muscles.
- drug effects : Body Size.
- metabolism : Fishes.
- Animals, Conservation of Natural Resources, Environmental Monitoring, Fires, Food Chain, Fresh Water, Trees.
Abstract
otal mercury (Hg)concentration was determined in several piscivorous and nonpiscivorous species of fish from 38 drainage lakes with clear‐cut, burnt, or undisturbed catchments located in the Canadian Boreal Shield. Mercury concentrations increased with increasing fish trophic position as estimated using stable isotopes of nitrogen (N; r2 = 0.52, 0.49, and 0.30 for cut, reference, and burnt lakes, respectively; p < 0.01). Mercury biomagnification per %‰ δ15N varied from 22 to 29% in the three groups of lakes. Mercury availability to organisms at the base of the food chain in lakes with cut catchments was higher than that in reference lakes. In cut lakes, Hg concentrations in fish were significantly related to ratio of the clear‐cut area to lake area (or lake volume; r = +0.82 and +0.74, respectively, p < 0.01). Both impact ratios were, in turn, significantly correlated with dissolved organic carbon. These findings suggest that differential loading of organic matter–bound Hg to lakes can affect Hg cycling. In addition, Hg concentrations exceeded the advisory limit for human consumption (0.5 μg/g wet wt) from the World Health Organization in all top predatory species (northern pike, walleye, and burbot) found in cut and in two partially burnt lakes. Thus, high Hg concentrations in fish from forest‐harvested and partially burnt lakes may reflect increased exposure to Hg relative to that in lakes not having these watershed disturbances.
Url:
DOI: 10.1897/04-065R.1
Affiliations:
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Le document en format XML
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International Journal</title><title level="j" type="abbrev">Environmental Toxicology and Chemistry</title><idno type="ISSN">0730-7268</idno><idno type="eISSN">1552-8618</idno><imprint><publisher>Wiley Periodicals, Inc.</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2005-03">2005-03</date><biblScope unit="volume">24</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="685">685</biblScope><biblScope unit="page" to="693">693</biblScope></imprint><idno type="ISSN">0730-7268</idno></series><idno type="istex">6B7164470D146346F8080CE13ABEAB8AEF72FE90</idno><idno type="DOI">10.1897/04-065R.1</idno><idno type="ArticleID">ETC5620240325</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0730-7268</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals (MeSH)</term><term>Body Size (drug effects)</term><term>Boreal zone</term><term>Canada (MeSH)</term><term>Clear‐cut</term><term>Conservation 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(analyse)</term><term>Mensurations corporelles (effets des médicaments et des substances chimiques)</term><term>Mercure (analyse)</term><term>Mercure (métabolisme)</term><term>Muscles (composition chimique)</term><term>Poissons (métabolisme)</term><term>Polluants chimiques de l'eau (analyse)</term><term>Polluants chimiques de l'eau (métabolisme)</term><term>Surveillance de l'environnement (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Mercury</term><term>Nitrogen Isotopes</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Mercury</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Canada</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Isotopes de l'azote</term><term>Mercure</term><term>Polluants chimiques de l'eau</term></keywords><keywords 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xml:lang="fr"><term>Animaux</term><term>Arbres</term><term>Azote</term><term>Canada</term><term>Chaine alimentaire</term><term>Conservation des ressources naturelles</term><term>Eau douce</term><term>Ecotoxicologie</term><term>Exploitation forestière</term><term>Incendie</term><term>Incendies</term><term>Mercure</term><term>Pisces</term><term>Surveillance de l'environnement</term><term>Zone boréale</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Azote</term><term>Exploitation forestière</term><term>Incendie</term><term>Mercure</term><term>Poisson</term><term>Mercure</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">otal mercury (Hg)concentration was determined in several piscivorous and nonpiscivorous species of fish from 38 drainage lakes with clear‐cut, burnt, or undisturbed catchments located in the Canadian Boreal Shield. Mercury concentrations increased with increasing fish trophic position as estimated using stable isotopes of nitrogen (N; r2 = 0.52, 0.49, and 0.30 for cut, reference, and burnt lakes, respectively; p < 0.01). Mercury biomagnification per %‰ δ15N varied from 22 to 29% in the three groups of lakes. Mercury availability to organisms at the base of the food chain in lakes with cut catchments was higher than that in reference lakes. In cut lakes, Hg concentrations in fish were significantly related to ratio of the clear‐cut area to lake area (or lake volume; r = +0.82 and +0.74, respectively, p < 0.01). Both impact ratios were, in turn, significantly correlated with dissolved organic carbon. These findings suggest that differential loading of organic matter–bound Hg to lakes can affect Hg cycling. In addition, Hg concentrations exceeded the advisory limit for human consumption (0.5 μg/g wet wt) from the World Health Organization in all top predatory species (northern pike, walleye, and burbot) found in cut and in two partially burnt lakes. Thus, high Hg concentrations in fish from forest‐harvested and partially burnt lakes may reflect increased exposure to Hg relative to that in lakes not having these watershed disturbances.</div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Garcia, Edenise" sort="Garcia, Edenise" uniqKey="Garcia E" first="Edenise" last="Garcia">Edenise Garcia</name></noRegion><name sortKey="Carignan, Richard" sort="Carignan, Richard" uniqKey="Carignan R" first="Richard" last="Carignan">Richard Carignan</name><name sortKey="Garcia, Edenise" sort="Garcia, Edenise" uniqKey="Garcia E" first="Edenise" last="Garcia">Edenise Garcia</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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