Affiliation:
1. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States of America
Abstract
Although persistent, bioaccumulative and toxic pollutants (PBTs) are well-studied individually, their distribution and variability on a global scale are largely unknown, particularly in marine fish. Using 2,662 measurements collected from peer-reviewed literature spanning 1969–2012, we examined variability of five classes of PBTs, considering effects of geography, habitat, and trophic level on observed concentrations. While we see large-scale spatial patterning in some PBTs (chlordanes, polychlorinated biphenyls), habitat type and trophic level did not contribute to significant patterning, with the exception of mercury. We further examined patterns of change in PBT concentration as a function of sampling year. All PBTs showed significant declines in concentration levels through time, ranging from 15–30% reduction per decade across PBT groups. Despite consistent evidence of reductions, variation in pollutant concentration remains high, indicating ongoing consumer risk of exposure to fish with pollutant levels exceeding EPA screening values. The temporal trends indicate that mitigation programs are effective, but that global levels decline slowly. In order for monitoring efforts to provide more targeted assessments of risk to PBT exposure, these data highlight an urgent need for improved replication and standardization of pollutant monitoring protocols for marine finfish.
Funder
US National Science Foundation
Subject
General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology,General Medicine,General Neuroscience
Reference54 articles.
1. Mercury in king mackerel, Scomberomorus cavalla, and Spanish mackerel, S. maculatus, from waters of the south-eastern USA: regional and historical trends;Adams;Marine and Freshwater Research,2007
2. Accumulation and distribution of biogenic and pollutant hydrocarbons, PCBs and DDT in tissues of western Mediterranean fishes;Albaiges;Marine Environmental Research,1987
3. Spatial differences and temporal trends of organochlorine compounds in biota from the northwestern hemisphere;Andersson;Archives of Environmental Contamination and Toxicology,1988
4. Polychlorinated-biphenyls, 1,1,1-trichloro-2,2-bis(p-chlorophenyl) ethane (p,p’-DDT) and 1,1-dichloro-2,2-bis(p-chlorophenyl)-ethylene (p,p’-DDE) in human plasma related to fish consumption;Asplund;Archives of Environmental Health,1994
5. Persistent organic pollutants in mangrove food webs in Singapore;Bayen;Chemosphere,2005
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