| Mercury and other trace elements in a pelagic Arctic marine food web (Northwater Polynya, Baffin Bay). | |
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MedLine Citation:
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PMID: 16061271 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Total mercury (THg), methylmercury (MeHg) and 22 other trace elements were measured in ice algae, three species of zooplankton, mixed zooplankton samples, Arctic cod (Boreogadus saida), ringed seals (Phoca hispida) and eight species of seabirds to examine the trophodynamics of these metals in an Arctic marine food web. All samples were collected in 1998 in the Northwater Polynya (NOW) located between Ellesmere Island and Greenland in Baffin Bay. THg and MeHg were found to biomagnify through the NOW food web, based on significant positive relationships between log THg and log MeHg concentrations vs. delta15N muscle and liver . The slope of these relationships for muscle THg and MeHg concentrations (slope=0.197 and 0.223, respectively) were similar to those reported for other aquatic food webs. The food web behavior of THg and delta15N appears constant, regardless of trophic state (eutrophic vs. oligotrophic), latitude (Arctic vs. tropical) or salinity (marine vs. freshwater) of the ecosystem. Rb in both liver and muscle tissue and Zn in muscle tissue were also found to biomagnify through this food web, although at a rate that is approximately 25% of that of THg. A number of elements (Cd, Pb and Ni in muscle tissue and Cd and Li in seabird liver tissue) were found to decrease trophically through the food web, as indicated by significantly negative relationships with tissue-specific delta15N. A diverse group of metals (Ag, Ba, La, Li, Sb, Sr, U and V) were found to have higher concentrations in zooplankton than seabirds or marine mammals due to bioconcentration from seawater. The remaining metals (As, Co, Cu, Ga, Mn, Mo and Se in muscle tissue) showed no relationship with trophic position, as indicated by delta15N values, although As in liver tissue showed significant biomagnification in the seabird portion of the food web. |
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Authors:
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Linda M Campbell; Ross J Norstrom; Keith A Hobson; Derek C G Muir; Sean Backus; Aaron T Fisk |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-08-01 |
Journal Detail:
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Title: The Science of the total environment Volume: 351-352 ISSN: 0048-9697 ISO Abbreviation: Sci. Total Environ. Publication Date: 2005 Dec |
Date Detail:
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Created Date: 2005-11-30 Completed Date: 2006-02-03 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0330500 Medline TA: Sci Total Environ Country: Netherlands |
Other Details:
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Languages: eng Pagination: 247-63 Citation Subset: IM |
Affiliation:
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National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, Ontario, Canada, L7R-4A6. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algae
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chemistry Animals Arctic Regions Arsenic / analysis, metabolism Birds Carbon Isotopes Environmental Monitoring Fishes Food Chain* Invertebrates Liver / chemistry Metals / analysis, metabolism Methylmercury Compounds / analysis, metabolism Muscles / chemistry Nitrogen Isotopes Phoca Seawater Selenium / analysis, metabolism Water Pollutants, Chemical / analysis*, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Carbon Isotopes; 0/Metals; 0/Methylmercury Compounds; 0/Nitrogen Isotopes; 0/Water Pollutants, Chemical; 7440-38-2/Arsenic; 7782-49-2/Selenium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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