Linked Life Data

17007118

Source:http://linkedlifedata.com/resource/pubmed/id/17007118

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2006-9-29
pubmed:abstractText
The development of ecological tracers to track the flow of energy and nutrients through food webs has provided new insights into the factors that are important in regulating diet composition in wildlife. The Great Lakes Herring Gull Monitoring Program has provided information regarding temporal trends in levels of bioaccumulative contaminants since the early 1970s. In recent years, data from this program have also been generated to examine ecological changes in the Great Lakes. Because the contaminants that are evaluated as part of this program biomagnify, food is the primary determinant of contaminant concentrations in the eggs that are analyzed annually. Fluctuations in diet composition could affect the interpretation of temporal trends by affecting exposure to contaminants. Retrospective analyses involving ecological tracers, i.e., stable nitrogen isotopes and fatty acids, have shown temporal change in the diets of Great Lakes herring gulls at some monitoring colonies. These dietary differences have led to temporal variation in the trophic position of herring gulls. Given that higher trophic level organisms incur greater exposure to biomagnifying contaminants, it is necessary to adjust for these temporal changes in trophic position to get an accurate indication of how contaminant burdens are changing within the Great Lakes ecosystem. Here, we outline a method to adjust for temporal changes in indicator species trophic position and discuss how these adjustments affect the interpretation of contaminant temporal trend monitoring data.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0013-936X
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5624-8
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Adjusting for temporal change in trophic position results in reduced rates of contaminant decline.
pubmed:affiliation
Environment Canada, Canadian Wildlife Service, National Wildlife Research Centre, 1125 Colonel By Drive, Ottawa, Ontario, K1A 0H3, Canada. craig.hebert@ec.gc.ca
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't