Nom du corpus

Corpus Systématique Animale

Titre du document

The influence of trophic level as measured by ?15N on mercury concentrations in freshwater organisms

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Poissons_v2b_000571
Auteur(s)
  • K. A. Kidd 1
  • R. H. Hesslein 2
  • R. J. P. Fudge 2
  • K. A. Hallard 2
Affiliation(s)
  • 1) Department of Biological Sciences, University of Alberta, T6G 2E9, Edmonton, Alberta, Canada
  • 2) Department of Fisheries and Oceans, 501 University Crescent, R3T 2N6, Winnipeg, Manitoba, Canada
Résumé

The relationship between mercury (Hg) concentrations in freshwater biota and trophic position, as defined by stable nitrogen isotope ratios (?15N), was examined in 6 lakes in northwestern Ontario. The heavier isotope of nitrogen (15N) increases an average of 3 parts per thousand (‰) from prey to predator and is used as a measure of an organism's trophic position. Dorsal muscle from lake trout, burbot, walleye, northern pike, white sucker, lake cisco, lake whitefish, and yellow perch was analyzed for Hg and ?15N using flameless atomic absorption and mass spectrometry respectively. Within each lake, log Hg was significantly related to ?15N (r 2 ranged from 0.47 to 0.91,P<0.01). For four species, yellow perch, northern pike, lake cisco, and lake trout, log Hg was positively related to ?15N (r 2 ranged from 0.37 to 0.47,P?0.09) across all lakes. We also used ?15N measurements (assuming a 3‰ shift between an organism and its diet) and the developed within-lake regression equations to calculate a prey Hg for each individual fish. These food Hg values were then used to predict predator Hg using Norstromet al's bioenergetics model. Predicted results were strongly correlated to measured Hg concentrations (r=0.91,P<0.001), indicating that ?15N has potential to be used in modeling.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - earth & environmental sciences
  • 3 - environmental sciences
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Pollution
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Water Science and Technology
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecological Modelling
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Environmental Chemistry
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Environmental Engineering
Catégories WoS
  • 1 - science ; 2 - water resources
  • 1 - science ; 2 - meteorology & atmospheric sciences
  • 1 - science ; 2 - environmental sciences
Identifiant ISTEX
A9AEA644D97AFCEE8C3ECB3337BE6C1907F9241E
Revue

Water, Air, and Soil Pollution

Année de publication
1995
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
6.535
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-6LQ66811-K
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