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Tags
HERO ID
3859255
Reference Type
Journal Article
Title
Spatio-temporal trends and monitoring design of perfluoroalkyl acids in the eggs of gull (Larid) species from across Canada and parts of the United States
Author(s)
Gewurtz, SB; Martin, PA; Letcher, RJ; Burgess, NM; Champoux, L; Elliott, JE; Weseloh, DV
Year
2016
Is Peer Reviewed?
1
Journal
Science of the Total Environment
ISSN:
0048-9697
EISSN:
1879-1026
Volume
565
Page Numbers
440-450
Language
English
PMID
27183458
DOI
10.1016/j.scitotenv.2016.04.149
Web of Science Id
WOS:000378206300043
Abstract
A large spatial dataset of perfluoroalkyl acid (PFAA) concentrations in eggs of herring gulls (Larus argentatus or congeneric species) collected from late April to early June between 2009 and 2014 from 28 colonies across Canada and parts of the Unites States was used to evaluate location-specific patterns in chemical concentrations and to generate hypotheses on the major sources affecting PFAA distributions. The highly bioaccumulative perfluorooctane sulfonic acid (PFOS) as well as other perfluoroalkyl sulfonic acids (PFSAs) showed the greatest concentrations in eggs from the lower Great Lakes of southern Ontario as well as from the St. Lawrence River. Despite the 2000 to 2002 phase-out of PFOS and related C8 chemistry by the major manufacturer at the time, ongoing losses from consumer products during use and disposal in urban/industrial locations continue to be major sources to the environment and are influencing the spatial trends of PFOS in Canada. In comparison to PFOS, perfluoroalkyl carboxylic acids (PFCAs) were not as concentrated in eggs in close proximity to urbanized/industrialized centers, but had surprisingly elevated levels in relatively remote regions such as Great Slave Lake, NT and East Bay in Hudson Bay, NU. The present results support the hypothesis that atmospheric transport and degradation of precursor chemicals, such as the fluorotelomer alcohols 8:2 FTOH and 10:2 FTOH, are influencing the spatial trends of PFCAs in Canada. A power analysis conducted on a representative urbanized/industrialized colony in the Toronto Harbour, ON, and a relatively remote colony in Lake Superior, emphasized the importance of consistent and long-term data collection in order to detect the anticipated changes in PFAA concentrations in Canadian gull eggs.
Keywords
Perfluoroalkyl acids; Gulls; Sources; Canada; Spatial trends; Power analysis
Tags
•
Additional PFAS (formerly XAgency)
•
Expanded PFAS SEM (formerly PFAS 430)
Litsearch: September 2019
PubMed
Not prioritized for screening
Perfluorooctane
•
FtOH 8:2
Literature Search
Pubmed
WOS
Screening Results
Excluded/Not on Topic
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search – Adverse outcome pathway (2015-present)
Pubmed
WOS
FtOH 8:2 (678-39-7)
Literature Search
Pubmed
WOS
•
PFAS 150
Literature Search Update December 2020
PubMed
Literature Search August 2019
PubMed
Web of Science
Not prioritized for screening
8:2 Fluorotelomer alcohol
Perfluorooctane
Perfluorooctanesulfonic acid
•
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search – Adverse outcome pathway (2015-present)
Pubmed
WOS
Screening Results
Excluded/Not on Topic
Literature Search Update (2013-2019)
PubMed
WOS
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