PMID- 37567402 OWN - NLM STAT- MEDLINE DCOM- 20231012 LR - 20231012 IS - 1873-6424 (Electronic) IS - 0269-7491 (Linking) VI - 336 DP - 2023 Nov 1 TI - Pacific salmon as vectors of environmental contaminants: An experimental test confirms synoptic surveys in natural streams. PG - 122355 LID - S0269-7491(23)01357-X [pii] LID - 10.1016/j.envpol.2023.122355 [doi] AB - Pacific salmon transfer large quantities of material to tributaries during their spawning migrations, including carcass tissue and labile nutrients but also persistent organic pollutants (POPs) and heavy metals. We conducted a Before-After-Control-Intervention experiment by adding salmon carcasses and eggs to a Michigan (USA) stream that had never received inputs from non-native salmon to understand the bioaccumulation and persistence of biotransported contaminants. Our experimental outcomes were compared to previous studies using meta-analysis. Coincident with the introduction of salmon, the PCB and DDE burden of resident trout significantly increased. However, we did not observe changes in total mercury (Hg). Two years after the salmon addition experiment concluded, resident trout POP concentrations had returned to pre-addition levels, with no difference between the treatment and control reaches. Analysis of effect sizes suggested that the contaminant response observed in our experiment is consistent with field survey observations. Our study suggested that the consumption of salmon eggs drove the increase in POP burden of resident trout while Hg bioaccumulation was influenced by watershed sources. Critically, our study suggests that ecosystems are capable of quickly recovering from POP inputs from species migrations if contaminant sources are removed. CI - Published by Elsevier Ltd. FAU - Gerig, Brandon S AU - Gerig BS AD - Great Rivers Cooperative Ecosystem Studies Unit, National Park Service, Columbia, MO, 65201, USA; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA. Electronic address: brandon_gerig@nps.gov. FAU - Chaloner, Dominic T AU - Chaloner DT AD - Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA. FAU - Rediske, Richard R AU - Rediske RR AD - Annis Water Resource Institute, Grand Valley State University, Muskegon, MI, 49441, USA. FAU - Paterson, Gordon AU - Paterson G AD - Great Lakes Research Center, Michigan Technological University, Houghton, MI, 49931, USA. FAU - Lamberti, Gary A AU - Lamberti GA AD - Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA. LA - eng PT - Journal Article PT - Meta-Analysis DEP - 20230809 PL - England TA - Environ Pollut JT - Environmental pollution (Barking, Essex : 1987) JID - 8804476 RN - 0 (Water Pollutants, Chemical) RN - FXS1BY2PGL (Mercury) RN - DFC2HB4I0K (Polychlorinated Biphenyls) SB - IM MH - Animals MH - Rivers MH - Ecosystem MH - *Water Pollutants, Chemical/analysis MH - Salmon MH - *Oncorhynchus MH - Trout MH - *Mercury/analysis MH - *Polychlorinated Biphenyls/analysis OTO - NOTNLM OT - Bioaccumulation OT - Contaminant biotransport OT - Experimental ecotoxicology OT - Mercury OT - Pacific salmon OT - Polychlorinated biphenyls 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- 2023/08/12 10:42 MHDA- 2023/10/12 06:43 CRDT- 2023/08/11 19:25 PHST- 2023/04/21 00:00 [received] PHST- 2023/07/11 00:00 [revised] PHST- 2023/08/08 00:00 [accepted] PHST- 2023/10/12 06:43 [medline] PHST- 2023/08/12 10:42 [pubmed] PHST- 2023/08/11 19:25 [entrez] AID - S0269-7491(23)01357-X [pii] AID - 10.1016/j.envpol.2023.122355 [doi] PST - ppublish SO - Environ Pollut. 2023 Nov 1;336:122355. doi: 10.1016/j.envpol.2023.122355. Epub 2023 Aug 9.