Linked Life Data

19686961

Source:http://linkedlifedata.com/resource/pubmed/id/19686961

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
15
pubmed:dateCreated
2010-8-5
pubmed:abstractText
A statistically robust method was applied to 316 time-series of 'legacy' persistent organic pollutants (POPs) in Arctic biota from marine, freshwater and terrestrial ecosystems with the purpose of generating a 'meta-analysis' of temporal trend data collected over the past two to three decades for locations from Alaska in the west to northern Scandinavian in the east. Information from recently published temporal trend studies was tabulated and comparisons were also drawn with trends in arctic air. Most of the analysed time-series of legacy POP compounds showed decreasing trends, with only a few time-series showing significantly increasing trends. Compounds such as alpha-HCH, gamma-HCH and SigmaDDT had a relatively high proportion of time-series showing significantly decreasing trends; SigmaCHL had the lowest proportion. beta-HCH was an exception, where long-range transport through the ocean, and not the atmosphere, may explain several increasing trends that were detected in the Canadian Arctic. Moving east from the Canadian Arctic there was a trend towards a greater proportion of significantly decreasing trends. Several time-series for DDE and SigmaDDT showed significantly non-exponential trends, most often with a period of relative stability followed by a decrease. The median 'minimum detectable annual change within a 10-year period' for all of the time-series considered was 12% which did not meet the desirable level of statistical power capable of detecting a 5% annual change with a significance level of 5% within a 10-year period. The trends observed in the biota were consistent with decreasing trends of legacy POPs reported for Arctic air which appear to follow historic decreases in emissions. However, recent decreases in air are also starting to show signs of levelling off which may be an indication that atmospheric concentrations and, consequently those in the biota, are being less driven by primary sources and more by environmental processes and degradation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/Chlordan, http://linkedlifedata.com/resource/pubmed/chemical/Dichlorodiphenyl Dichloroethylene, http://linkedlifedata.com/resource/pubmed/chemical/Dieldrin, http://linkedlifedata.com/resource/pubmed/chemical/Environmental Pollutants, http://linkedlifedata.com/resource/pubmed/chemical/Heptachlor Epoxide, http://linkedlifedata.com/resource/pubmed/chemical/Hexachlorobenzene, http://linkedlifedata.com/resource/pubmed/chemical/Lindane, http://linkedlifedata.com/resource/pubmed/chemical/Mirex, http://linkedlifedata.com/resource/pubmed/chemical/Organic Chemicals, http://linkedlifedata.com/resource/pubmed/chemical/Toxaphene, http://linkedlifedata.com/resource/pubmed/chemical/alpha-hexachlorocyclohexane, http://linkedlifedata.com/resource/pubmed/chemical/beta-hexachlorocyclohexane
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1879-1026
pubmed:author
pubmed:copyrightInfo
Copyright 2009 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
408
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2874-84
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Temporal trends of legacy POPs in Arctic biota, an update.
pubmed:affiliation
National Environmental Research Institute, University of Aarhus, Roskilde, Denmark. ffr@dmu.dk
pubmed:publicationType
Journal Article, Review, Research Support, Non-U.S. Gov't