Mercury concentrations in fish from forest harvesting and fire-impacted Canadian boreal lakes compared using stable isotopes of nitrogen
Identifieur interne : 000067 ( PascalFrancis/Checkpoint ); précédent : 000066; suivant : 000068Mercury 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.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Mercure, Exploitation forestière, Incendie, Azote.
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Abstract
Total 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.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Mercury concentrations in fish from forest harvesting and fire-impacted Canadian boreal lakes compared using stable isotopes of nitrogen</title><author><name sortKey="Garcia, Edenise" sort="Garcia, Edenise" uniqKey="Garcia E" first="Edenise" last="Garcia">Edenise Garcia</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Montréal, Département de Sciences biologiques, succursale Centre Ville, CP 6128</s1><s2>Montréal, Québec H3C 3J7</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Montréal, Québec H3C 3J7</wicri:noRegion></affiliation></author><author><name sortKey="Carignan, Richard" sort="Carignan, Richard" uniqKey="Carignan R" first="Richard" last="Carignan">Richard Carignan</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Montréal, Département de Sciences biologiques, succursale Centre Ville, CP 6128</s1><s2>Montréal, Québec H3C 3J7</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Montréal, Québec H3C 3J7</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">05-0232860</idno><date when="2005">2005</date><idno type="stanalyst">PASCAL 05-0232860 INIST</idno><idno type="RBID">Pascal:05-0232860</idno><idno type="wicri:Area/PascalFrancis/Corpus">000070</idno><idno type="wicri:Area/PascalFrancis/Curation">000048</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000067</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000067</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Mercury concentrations in fish from forest harvesting and fire-impacted Canadian boreal lakes compared using stable isotopes of nitrogen</title><author><name sortKey="Garcia, Edenise" sort="Garcia, Edenise" uniqKey="Garcia E" first="Edenise" last="Garcia">Edenise Garcia</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Montréal, Département de Sciences biologiques, succursale Centre Ville, CP 6128</s1><s2>Montréal, Québec H3C 3J7</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Montréal, Québec H3C 3J7</wicri:noRegion></affiliation></author><author><name sortKey="Carignan, Richard" sort="Carignan, Richard" uniqKey="Carignan R" first="Richard" last="Carignan">Richard Carignan</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Université de Montréal, Département de Sciences biologiques, succursale Centre Ville, CP 6128</s1><s2>Montréal, Québec H3C 3J7</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Montréal, Québec H3C 3J7</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Environmental toxicology and chemistry</title><title level="j" type="abbreviated">Environ. toxicol. chem.</title><idno type="ISSN">0730-7268</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Environmental toxicology and chemistry</title><title level="j" type="abbreviated">Environ. toxicol. chem.</title><idno type="ISSN">0730-7268</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Boreal zone</term><term>Ecotoxicology</term><term>Fire</term><term>Forest logging</term><term>Mercury</term><term>Nitrogen</term><term>Pisces</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Mercure</term><term>Exploitation forestière</term><term>Incendie</term><term>Azote</term><term>Ecotoxicologie</term><term>Pisces</term><term>Zone boréale</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Mercure</term><term>Exploitation forestière</term><term>Incendie</term><term>Azote</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Total 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; r<sup>2</sup> = 0.52, 0.49, and 0.30 for cut, reference, and burnt lakes, respectively; p < 0.01). Mercury biomagnification per ‰ δ<sup>15</sup>N 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><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0730-7268</s0></fA01><fA02 i1="01"><s0>ETOCDK</s0></fA02><fA03 i2="1"><s0>Environ. toxicol. chem.</s0></fA03><fA05><s2>24</s2></fA05><fA06><s2>3</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Mercury concentrations in fish from forest harvesting and fire-impacted Canadian boreal lakes compared using stable isotopes of nitrogen</s1></fA08><fA11 i1="01" i2="1"><s1>GARCIA (Edenise)</s1></fA11><fA11 i1="02" i2="1"><s1>CARIGNAN (Richard)</s1></fA11><fA14 i1="01"><s1>Université de Montréal, Département de Sciences biologiques, succursale Centre Ville, CP 6128</s1><s2>Montréal, Québec H3C 3J7</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></fA14><fA20><s1>685-693</s1></fA20><fA21><s1>2005</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>19956</s2><s5>354000126255890250</s5></fA43><fA44><s0>0000</s0><s1>© 2005 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>34 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>05-0232860</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Environmental toxicology and chemistry</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>Total 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; r<sup>2</sup> = 0.52, 0.49, and 0.30 for cut, reference, and burnt lakes, respectively; p < 0.01). Mercury biomagnification per ‰ δ<sup>15</sup>N 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. 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