Mercury trends in predatory fish in Great Slave Lake: the influence of temperature and other climate drivers.
Identifieur interne : 000133 ( Main/Exploration ); précédent : 000132; suivant : 000134Mercury trends in predatory fish in Great Slave Lake: the influence of temperature and other climate drivers.
Auteurs : Marlene Evans [Canada] ; Derek Muir [Canada] ; Robert B. Brua ; Jonathan Keating ; Xiaowa WangSource :
- Environmental science & technology [ 1520-5851 ] ; 2013.
Descripteurs français
- KwdFr :
- Animaux (MeSH), Canada (MeSH), Changement climatique (MeSH), Climat (MeSH), Comportement prédateur (MeSH), Esocidae (métabolisme), Facteurs temps (MeSH), Gadiformes (métabolisme), Géographie (MeSH), Lacs (MeSH), Mercure (analyse), Modèles linéaires (MeSH), Muscles (métabolisme), Poissons (métabolisme), Polluants chimiques de l'eau (analyse), Surveillance de l'environnement (MeSH), Sédiments géologiques (composition chimique), Température (MeSH), Truite (métabolisme).
- MESH :
- analyse : Mercure, Polluants chimiques de l'eau.
- composition chimique : Sédiments géologiques.
- métabolisme : Esocidae, Gadiformes, Muscles, Poissons, Truite.
- Animaux, Canada, Changement climatique, Climat, Comportement prédateur, Facteurs temps, Géographie, Lacs, Modèles linéaires, Surveillance de l'environnement, Température.
- Wicri :
- geographic : Canada.
English descriptors
- KwdEn :
- Animals (MeSH), Canada (MeSH), Climate (MeSH), Climate Change (MeSH), Environmental Monitoring (MeSH), Esocidae (metabolism), Fishes (metabolism), Gadiformes (metabolism), Geography (MeSH), Geologic Sediments (chemistry), Lakes (MeSH), Linear Models (MeSH), Mercury (analysis), Muscles (metabolism), Predatory Behavior (MeSH), Temperature (MeSH), Time Factors (MeSH), Trout (metabolism), Water Pollutants, Chemical (analysis).
- MESH :
- chemical , analysis : Mercury, Water Pollutants, Chemical.
- geographic : Canada.
- chemistry : Geologic Sediments.
- metabolism : Esocidae, Fishes, Gadiformes, Muscles, Trout.
- Animals, Climate, Climate Change, Environmental Monitoring, Geography, Lakes, Linear Models, Predatory Behavior, Temperature, Time Factors.
Abstract
Here we report on trends in mercury (Hg) concentrations in lake trout (Salvelinus namaycush), burbot (Lota lota), and northern pike (Esox lucius) from Great Slave Lake, located in the Mackenzie River Basin (MRB) and investigate how climate factors may be influencing these trends. Hg concentrations in lake trout and burbot increased significantly over the early 1990s to 2012 in the two major regions of the lake; no trend was evident for northern pike over 1999-2012. Temporal variations in Hg concentrations in lake trout and burbot were similar with respect to timing of peaks and troughs. Inclusion of climate variables based on annual means, particularly temperature, improved explanatory power for variations in Hg over analyses based only on year and fish length; unexpectedly, the temperature coefficient was negative. Climate analyses based on growing season means (defined as May-September) had less explanatory power suggesting that trends were more strongly associated with colder months within the year. Inclusion of the Pacific/North American index improved explanatory power for the lake trout model suggesting that trends may have been affected by air circulation patterns. Overall, while our study confirmed previously reported trends of Hg increase in burbot in the MRB, we found no evidence that these trends were directly driven by increasing temperatures and productivity.
DOI: 10.1021/es402645x
PubMed: 24111928
Affiliations:
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Le document en format XML
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Brua</name></author><author><name sortKey="Keating, Jonathan" sort="Keating, Jonathan" uniqKey="Keating J" first="Jonathan" last="Keating">Jonathan Keating</name></author><author><name sortKey="Wang, Xiaowa" sort="Wang, Xiaowa" uniqKey="Wang X" first="Xiaowa" last="Wang">Xiaowa Wang</name></author></analytic><series><title level="j">Environmental science & technology</title><idno type="eISSN">1520-5851</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals (MeSH)</term><term>Canada (MeSH)</term><term>Climate (MeSH)</term><term>Climate Change (MeSH)</term><term>Environmental Monitoring (MeSH)</term><term>Esocidae (metabolism)</term><term>Fishes (metabolism)</term><term>Gadiformes (metabolism)</term><term>Geography (MeSH)</term><term>Geologic Sediments (chemistry)</term><term>Lakes (MeSH)</term><term>Linear Models (MeSH)</term><term>Mercury (analysis)</term><term>Muscles (metabolism)</term><term>Predatory Behavior (MeSH)</term><term>Temperature (MeSH)</term><term>Time Factors (MeSH)</term><term>Trout (metabolism)</term><term>Water Pollutants, Chemical (analysis)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Animaux (MeSH)</term><term>Canada (MeSH)</term><term>Changement climatique (MeSH)</term><term>Climat (MeSH)</term><term>Comportement prédateur (MeSH)</term><term>Esocidae (métabolisme)</term><term>Facteurs temps (MeSH)</term><term>Gadiformes (métabolisme)</term><term>Géographie (MeSH)</term><term>Lacs (MeSH)</term><term>Mercure (analyse)</term><term>Modèles linéaires (MeSH)</term><term>Muscles (métabolisme)</term><term>Poissons (métabolisme)</term><term>Polluants chimiques de l'eau (analyse)</term><term>Surveillance de l'environnement (MeSH)</term><term>Sédiments géologiques (composition chimique)</term><term>Température (MeSH)</term><term>Truite (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" 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>Mercure</term><term>Polluants chimiques de l'eau</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Geologic Sediments</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Sédiments géologiques</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Esocidae</term><term>Fishes</term><term>Gadiformes</term><term>Muscles</term><term>Trout</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Esocidae</term><term>Gadiformes</term><term>Muscles</term><term>Poissons</term><term>Truite</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Climate</term><term>Climate Change</term><term>Environmental Monitoring</term><term>Geography</term><term>Lakes</term><term>Linear Models</term><term>Predatory Behavior</term><term>Temperature</term><term>Time Factors</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Animaux</term><term>Canada</term><term>Changement climatique</term><term>Climat</term><term>Comportement prédateur</term><term>Facteurs temps</term><term>Géographie</term><term>Lacs</term><term>Modèles linéaires</term><term>Surveillance de l'environnement</term><term>Température</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Here we report on trends in mercury (Hg) concentrations in lake trout (Salvelinus namaycush), burbot (Lota lota), and northern pike (Esox lucius) from Great Slave Lake, located in the Mackenzie River Basin (MRB) and investigate how climate factors may be influencing these trends. Hg concentrations in lake trout and burbot increased significantly over the early 1990s to 2012 in the two major regions of the lake; no trend was evident for northern pike over 1999-2012. Temporal variations in Hg concentrations in lake trout and burbot were similar with respect to timing of peaks and troughs. Inclusion of climate variables based on annual means, particularly temperature, improved explanatory power for variations in Hg over analyses based only on year and fish length; unexpectedly, the temperature coefficient was negative. Climate analyses based on growing season means (defined as May-September) had less explanatory power suggesting that trends were more strongly associated with colder months within the year. Inclusion of the Pacific/North American index improved explanatory power for the lake trout model suggesting that trends may have been affected by air circulation patterns. Overall, while our study confirmed previously reported trends of Hg increase in burbot in the MRB, we found no evidence that these trends were directly driven by increasing temperatures and productivity.</div></front></TEI><affiliations><list><country><li>Canada</li></country><region><li>Ontario</li></region><settlement><li>Burlington (Ontario)</li></settlement><orgName><li>Centre canadien des eaux intérieures</li></orgName></list><tree><noCountry><name sortKey="Brua, Robert B" sort="Brua, Robert B" uniqKey="Brua R" first="Robert B" last="Brua">Robert B. Brua</name><name sortKey="Keating, Jonathan" sort="Keating, Jonathan" uniqKey="Keating J" first="Jonathan" last="Keating">Jonathan Keating</name><name sortKey="Wang, Xiaowa" sort="Wang, Xiaowa" uniqKey="Wang X" first="Xiaowa" last="Wang">Xiaowa Wang</name></noCountry><country name="Canada"><noRegion><name sortKey="Evans, Marlene" sort="Evans, Marlene" uniqKey="Evans M" first="Marlene" last="Evans">Marlene Evans</name></noRegion><name sortKey="Muir, Derek" sort="Muir, Derek" uniqKey="Muir D" first="Derek" last="Muir">Derek Muir</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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