PMID- 32041017 OWN - NLM STAT- MEDLINE DCOM- 20200331 LR - 20200331 IS - 1879-1026 (Electronic) IS - 0048-9697 (Linking) VI - 714 DP - 2020 Apr 20 TI - Trophic magnification of legacy persistent organic pollutants in an urban terrestrial food web. PG - 136746 LID - S0048-9697(20)30256-4 [pii] LID - 10.1016/j.scitotenv.2020.136746 [doi] AB - Legacy persistent organic pollutants (POPs), including organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs), persist for generations in the environment and often negatively impact endocrine functions in exposed wildlife. Protocols to assess the bioaccumulation potential of these chemicals within terrestrial systems are far less developed than for aquatic systems. Consequently, regulatory agencies in Canada, the United States, and the European Union rely primarily on aquatic information for the bioaccumulation assessment of chemicals. However, studies have shown that some chemicals that are not bioaccumulative in aquatic food webs can biomagnify in terrestrial food webs. Thus, to better understand the bioaccumulative behaviour of chemicals in terrestrial systems, we examined trophic magnification of hydrophobic POPs in an urban terrestrial food web that included an avian apex predator, the Cooper's hawk (Accipiter cooperii). Over 100 samples were collected from various trophic levels of the food web including hawk eggs, songbirds, invertebrates, and berries and analysed for concentrations of 38 PCB congeners, 20 OCPs, 20 PBDE congeners, and 7 other brominated flame retardants listed on the Government of Canada's Chemicals Management Plan. We determined trophic magnification factors (TMFs) for contaminants that had a 50% or greater detection frequency in all biota samples and compared these terrestrial TMFs to those observed in aquatic systems. TMFs in this terrestrial food web ranged between 1.2 (0.21 SE) and 15 (4.0 SE), indicating that the majority of these POPs are biomagnifying. TMFs of the legacy POPs investigated in this terrestrial food web increased in a statistically significant relationship with both the logarithm of the octanol-air (log K(OA)) and octanal-water partition (log K(OW)) coefficients of the POPs. POPs with a log K(OA) >6 or a log K(OW) >5 exhibited biomagnification potential in this terrestrial food web. CI - Crown Copyright (c) 2020. Published by Elsevier B.V. All rights reserved. FAU - Fremlin, Kate M AU - Fremlin KM AD - Simon Fraser University, Dept. of Biological Sciences, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada. Electronic address: kfremlin@sfu.ca. FAU - Elliott, John E AU - Elliott JE AD - Environment and Climate Change Canada, Ecotoxicology and Wildlife Health Division, 5421 Robertson Road, Delta, British Columbia V4K 3N2, Canada; Simon Fraser University, Dept. of Biological Sciences, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada. Electronic address: john.elliott@canada.ca. FAU - Green, David J AU - Green DJ AD - Simon Fraser University, Dept. of Biological Sciences, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada. Electronic address: djgreen@sfu.ca. FAU - Drouillard, Kenneth G AU - Drouillard KG AD - Great Lakes Institute for Environmental Research, University of Windsor, 2990 Riverside Drive West, Windsor, Ontario N9B 3P4, Canada. Electronic address: kgd@uwindsor.ca. FAU - Harner, Tom AU - Harner T AD - Environment and Climate Change Canada, Air Quality Research Division, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada. Electronic address: tom.harner@canada.ca. FAU - Eng, Anita AU - Eng A AD - Environment and Climate Change Canada, Air Quality Research Division, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada. Electronic address: anita.eng@canada.ca. FAU - Gobas, Frank A P C AU - Gobas FAPC AD - School of Resource and Environmental Management, Faculty of the Environment, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada; Simon Fraser University, Dept. of Biological Sciences, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada. Electronic address: gobas@sfu.ca. LA - eng PT - Journal Article DEP - 20200120 PL - Netherlands TA - Sci Total Environ JT - The Science of the total environment JID - 0330500 RN - 0 (Environmental Pollutants) RN - 0 (Halogenated Diphenyl Ethers) RN - 0 (Water Pollutants, Chemical) RN - DFC2HB4I0K (Polychlorinated Biphenyls) SB - IM MH - Animals MH - Canada MH - Environmental Monitoring MH - *Environmental Pollutants MH - Fishes MH - *Food Chain MH - Halogenated Diphenyl Ethers MH - Polychlorinated Biphenyls MH - Water Pollutants, Chemical OTO - NOTNLM OT - Avian apex predator OT - Emergent POPs OT - Hydrophobic OT - Legacy POPs OT - Terrestrial food web OT - Trophic magnification 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- 2020/02/12 06:00 MHDA- 2020/04/01 06:00 CRDT- 2020/02/12 06:00 PHST- 2019/11/12 00:00 [received] PHST- 2020/01/13 00:00 [revised] PHST- 2020/01/14 00:00 [accepted] PHST- 2020/02/12 06:00 [pubmed] PHST- 2020/04/01 06:00 [medline] PHST- 2020/02/12 06:00 [entrez] AID - S0048-9697(20)30256-4 [pii] AID - 10.1016/j.scitotenv.2020.136746 [doi] PST - ppublish SO - Sci Total Environ. 2020 Apr 20;714:136746. doi: 10.1016/j.scitotenv.2020.136746. Epub 2020 Jan 20.