Increasing contaminant burdens in an arctic fish, Burbot ( Lota lota ), in a warming climate.
Identifieur interne : 000170 ( Ncbi/Curation ); précédent : 000169; suivant : 000171Increasing contaminant burdens in an arctic fish, Burbot ( Lota lota ), in a warming climate.
Auteurs : J. Carrie [Canada] ; F. Wang ; H. Sanei ; R W Macdonald ; P M Outridge ; G A SternSource :
- Environmental science & technology [ 0013-936X ] ; 2010.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Eucaryotes, Mercure, Poissons, Polluants chimiques de l'eau, Polychlorobiphényles.
- Animaux, Climat, Régions arctiques, Température élevée.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Mercury, Polychlorinated Biphenyls, Water Pollutants, Chemical.
- geographic : Arctic Regions.
- metabolism : Eukaryota, Fishes.
- Animals, Climate, Hot Temperature.
Abstract
The temporal patterns of mercury (Hg), polychlorinated biphenyls (PCBs), and other contaminants in Arctic aquatic biota are usually attributed to changing atmospheric sources. However, climate variability and change is another means of altering contaminant fate and bioavailability. We show here that the concentrations of Hg and PCBs in Mackenzie River burbot ( Lota lota ), a top predator fish and important staple food for northern Canadian communities, have increased significantly over the last 25 years despite falling or stable atmospheric concentrations, suggesting that environmental processes subsequent to atmospheric transport are responsible. Using a dated sediment core from a tributary lake near the Mackenzie River sampling site, we show that variations in Hg concentrations downcore are strongly associated with labile, algal-derived organic matter (OM). Strong temporal correlations between increasing primary productivity and biotic Hg and PCBs as reflected by burbot suggest that warming temperatures and reduced ice cover may lead to increased exposure to these contaminants in high trophic level Arctic freshwater biota.
DOI: 10.1021/es902582y
PubMed: 19957995
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pubmed:19957995Le document en format XML
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Wang</name></author><author><name sortKey="Sanei, H" sort="Sanei, H" uniqKey="Sanei H" first="H" last="Sanei">H. Sanei</name></author><author><name sortKey="Macdonald, R W" sort="Macdonald, R W" uniqKey="Macdonald R" first="R W" last="Macdonald">R W Macdonald</name></author><author><name sortKey="Outridge, P M" sort="Outridge, P M" uniqKey="Outridge P" first="P M" last="Outridge">P M Outridge</name></author><author><name sortKey="Stern, G A" sort="Stern, G A" uniqKey="Stern G" first="G A" last="Stern">G A Stern</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2010">2010</date><idno type="doi">10.1021/es902582y</idno><idno type="RBID">pubmed:19957995</idno><idno type="pmid">19957995</idno><idno type="wicri:Area/PubMed/Corpus">000073</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000073</idno><idno type="wicri:Area/PubMed/Curation">000073</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000073</idno><idno type="wicri:Area/PubMed/Checkpoint">000068</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000068</idno><idno type="wicri:Area/Ncbi/Merge">000170</idno><idno type="wicri:Area/Ncbi/Curation">000170</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Increasing contaminant burdens in an arctic fish, Burbot ( Lota lota ), in a warming climate.</title><author><name sortKey="Carrie, J" sort="Carrie, J" uniqKey="Carrie J" first="J" last="Carrie">J. Carrie</name><affiliation wicri:level="4"><nlm:affiliation>Centre for Earth Observation Science, Department of Environment & Geography, University of Manitoba, 125 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Centre for Earth Observation Science, Department of Environment & Geography, University of Manitoba, 125 Dysart Road, Winnipeg, Manitoba R3T 2N2</wicri:regionArea><orgName type="university">Université du Manitoba</orgName><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName></affiliation></author><author><name sortKey="Wang, F" sort="Wang, F" uniqKey="Wang F" first="F" last="Wang">F. Wang</name></author><author><name sortKey="Sanei, H" sort="Sanei, H" uniqKey="Sanei H" first="H" last="Sanei">H. Sanei</name></author><author><name sortKey="Macdonald, R W" sort="Macdonald, R W" uniqKey="Macdonald R" first="R W" last="Macdonald">R W Macdonald</name></author><author><name sortKey="Outridge, P M" sort="Outridge, P M" uniqKey="Outridge P" first="P M" last="Outridge">P M Outridge</name></author><author><name sortKey="Stern, G A" sort="Stern, G A" uniqKey="Stern G" first="G A" last="Stern">G A Stern</name></author></analytic><series><title level="j">Environmental science & technology</title><idno type="ISSN">0013-936X</idno><imprint><date when="2010" type="published">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals (MeSH)</term><term>Arctic Regions (MeSH)</term><term>Climate (MeSH)</term><term>Eukaryota (metabolism)</term><term>Fishes (metabolism)</term><term>Hot Temperature (MeSH)</term><term>Mercury (metabolism)</term><term>Polychlorinated Biphenyls (metabolism)</term><term>Water Pollutants, Chemical (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Animaux (MeSH)</term><term>Climat (MeSH)</term><term>Eucaryotes (métabolisme)</term><term>Mercure (métabolisme)</term><term>Poissons (métabolisme)</term><term>Polluants chimiques de l'eau (métabolisme)</term><term>Polychlorobiphényles (métabolisme)</term><term>Régions arctiques (MeSH)</term><term>Température élevée (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Mercury</term><term>Polychlorinated Biphenyls</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Arctic Regions</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Eukaryota</term><term>Fishes</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Eucaryotes</term><term>Mercure</term><term>Poissons</term><term>Polluants chimiques de l'eau</term><term>Polychlorobiphényles</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Climate</term><term>Hot Temperature</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Animaux</term><term>Climat</term><term>Régions arctiques</term><term>Température élevée</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The temporal patterns of mercury (Hg), polychlorinated biphenyls (PCBs), and other contaminants in Arctic aquatic biota are usually attributed to changing atmospheric sources. However, climate variability and change is another means of altering contaminant fate and bioavailability. We show here that the concentrations of Hg and PCBs in Mackenzie River burbot ( Lota lota ), a top predator fish and important staple food for northern Canadian communities, have increased significantly over the last 25 years despite falling or stable atmospheric concentrations, suggesting that environmental processes subsequent to atmospheric transport are responsible. Using a dated sediment core from a tributary lake near the Mackenzie River sampling site, we show that variations in Hg concentrations downcore are strongly associated with labile, algal-derived organic matter (OM). Strong temporal correlations between increasing primary productivity and biotic Hg and PCBs as reflected by burbot suggest that warming temperatures and reduced ice cover may lead to increased exposure to these contaminants in high trophic level Arctic freshwater biota.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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