PMID- 36368377
OWN - NLM
STAT- MEDLINE
DCOM- 20221215
LR  - 20221215
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 858
IP  - Pt 3
DP  - 2023 Feb 1
TI  - Temporal trends (1968-2019) of legacy persistent organic pollutants (POPs) in 
      seabird eggs from the northeast Pacific: Is it finally twilight for old POPs?
PG  - 160084
LID - S0048-9697(22)07184-4 [pii]
LID - 10.1016/j.scitotenv.2022.160084 [doi]
AB  - Legacy persistent organic pollutants (POPs), such as organochlorine pesticides 
      (OCs) and polychlorinated biphenyls (PCBs), are known to persist in the marine 
      environment; however, whether concentrations of these POPs have decreased or 
      stabilized from Canada's Pacific coast in recent years is unclear. Here, we 
      examined temporal trends of various legacy POPs in the eggs of five seabird 
      species; two cormorants (Nannopterum auritum and Urile pelagicus), an auklet 
      (Cerorhinca monocerata), a murrelet (Synthliboramphus antiquus), and a 
      storm-petrel (Hydrobates leucorhous), sampled 1968 to 2019 from 23 colonies along 
      the Pacific coast of British Columbia, Canada. The contaminant profile in the 
      eggs of all species and sampling years was dominated by SigmaPCBs, followed by SigmaDDT 
      (mostly p,p'-DDE), SigmaHCH (beta-HCH), SigmaCHLOR (oxychlordane), and SigmaCBz (HCB). SigmaOC and 
      SigmaPCB concentrations were generally higher in double-crested cormorant eggs than 
      in the other four species. The majority of legacy POPs are either significantly 
      declining (e.g. p,p'-DDE, HCB, HE, oxychlordane, SigmaPCBs) or showing no directional 
      change over time (SigmaMirex) in the eggs of our monitoring species. Contaminants 
      such as alpha-HCH, cis- and trans-chlordane, p,p'-DDT, dieldrin, and 
      octachlorostyrene also showed evidence of downward trends, largely influenced by 
      non-detect values during more recent sampling periods. Increasing trends were 
      observed for beta-HCH in the eggs of some species; however, mean concentrations 
      eventually returned to early 2000 levels by the end of the study period. Although 
      bulk delta(15)N and delta(13)C egg values varied interannually, compound-specific amino 
      acid analyses suggested no major changes in trophic position or baseline food web 
      signature. Temporal trends observed here were comparable to those found in other 
      seabird species and pelagic food webs. As most legacy POPs in our data set were 
      at very low levels in recent years, we support the general consensus that it is 
      indeed the twilight years for old POPs, and we attribute these declines largely 
      to voluntary regulations and international restrictions on the production and use 
      of these compounds, and thus their release into the marine environment.
CI  - Copyright (c) 2022. Published by Elsevier B.V.
FAU - Elliott, John E
AU  - Elliott JE
AD  - Environment and Climate Change Canada, Ecotoxicology & Wildlife Health Division, 
      5421 Robertson Rd, Delta, British Columbia, Canada. Electronic address: 
      john.elliott@ec.gc.ca.
FAU - Kesic, Robert
AU  - Kesic R
AD  - Environment and Climate Change Canada, Ecotoxicology & Wildlife Health Division, 
      5421 Robertson Rd, Delta, British Columbia, Canada. Electronic address: 
      robert.kesic@ec.gc.ca.
FAU - Lee, Sandi L
AU  - Lee SL
AD  - Environment and Climate Change Canada, Ecotoxicology & Wildlife Health Division, 
      5421 Robertson Rd, Delta, British Columbia, Canada. Electronic address: 
      sandi.lee@ec.gc.ca.
FAU - Elliott, Kyle H
AU  - Elliott KH
AD  - Department of Natural Resource Sciences, McGill University, Sainte 
      Anne-de-Bellevue, Montreal, Quebec, Canada. Electronic address: 
      kyle.elliott@mcgill.ca.
LA  - eng
PT  - Journal Article
DEP - 20221108
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Persistent Organic Pollutants)
RN  - YM80ODM9PD (beta-hexachlorocyclohexane)
RN  - 0 (Environmental Pollutants)
SB  - IM
MH  - *Persistent Organic Pollutants
MH  - *Environmental Pollutants
MH  - British Columbia
OTO - NOTNLM
OT  - Legacy POPs
OT  - Organochlorines
OT  - PCBs
OT  - Seabird eggs
OT  - Stable isotopes
OT  - Temporal trends
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2022/11/12 06:00
MHDA- 2022/12/15 06:00
CRDT- 2022/11/11 19:23
PHST- 2022/08/12 00:00 [received]
PHST- 2022/11/03 00:00 [revised]
PHST- 2022/11/05 00:00 [accepted]
PHST- 2022/11/12 06:00 [pubmed]
PHST- 2022/12/15 06:00 [medline]
PHST- 2022/11/11 19:23 [entrez]
AID - S0048-9697(22)07184-4 [pii]
AID - 10.1016/j.scitotenv.2022.160084 [doi]
PST - ppublish
SO  - Sci Total Environ. 2023 Feb 1;858(Pt 3):160084. doi: 
      10.1016/j.scitotenv.2022.160084. Epub 2022 Nov 8.