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Gregory, Braden R.B [VerfasserIn]; Kissinger, Jennifer A. [VerfasserIn]; Clarkson, Chloe [VerfasserIn]; Kimpe, Linda E. [VerfasserIn]; Eickmeyer, David C. [VerfasserIn]; Kurek, Josh [VerfasserIn]; Smol, John P. [VerfasserIn]; Blais, Jules [VerfasserIn]

Are Fur Farms a Source of Persistent Organic Pollutants or Mercury to Nearby Freshwater Ecosystems?

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  • Medientyp: E-Book
  • Titel: Are Fur Farms a Source of Persistent Organic Pollutants or Mercury to Nearby Freshwater Ecosystems?
  • Beteiligte: Gregory, Braden R.B [VerfasserIn]; Kissinger, Jennifer A. [VerfasserIn]; Clarkson, Chloe [VerfasserIn]; Kimpe, Linda E. [VerfasserIn]; Eickmeyer, David C. [VerfasserIn]; Kurek, Josh [VerfasserIn]; Smol, John P. [VerfasserIn]; Blais, Jules [VerfasserIn]
  • Erschienen: [S.l.]: SSRN, [2022]
  • Umfang: 1 Online-Ressource (39 p)
  • Sprache: Englisch
  • DOI: 10.2139/ssrn.4026164
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  • Beschreibung: Farming of carnivorous livestock for pelts has the potential to contaminate nearby ecosystems because animal feed and waste potentially contain persistent organic pollutants (POPs) and metals. Mink farms in Nova Scotia (NS), Canada, provide livestock with feed partially composed of marine fish meal. To test whether mink farms contribute contaminants to nearby lakes, we quantified organochlorine pesticides (OCP), polychlorinated biphenyls (PCB), and total mercury (THg) in livestock/aquaculture feed, waste, and sediment collected from 14 lakes within rural southwest NS, where mink farms are abundant and have operated for decades. Mercury was measured in lake sediment cores of all 14 lakes; PCBs and OCPs were quantified in sediment cores recovered from two lakes with mink farms in their catchments and two reference lakes. Mercury, PCBs, dichlorodiphenyltrichloroethane (DDT), hexachlorocyclohexane (HCH), and dieldrin were present in livestock waste and feed, indicating they are potential contaminant sources. Lakes with mink farms in their catchment exhibited significantly higher THg flux than lakes downstream of mink farming activity and reference lakes (p < 0.0001) after the intensification of mink farming in 1980, indicating that mink farms may have increased THg flux to these lakes. Sedimentary ƩPCB flux was elevated in lakes with mink farms in their catchments, suggesting PCB contributions from mink farming and local agricultural in addition to atmospheric deposition. Elevated ƩDDT in lakes near mink farms relative to reference lakes suggests a possible enrichment related to mink farming, although mixed land use and historical DDT usage related to forestry in the region complicates DDT source attribution. Maximum dieldrin flux and HCH flux occurred coeval with peak worldwide usage in the 1970s and are unlikely to be associated with local mink farming. Mink farming activities were associated with increased THg, PCB, and possibly DDT concentrations in the lake ecosystems of southwestern NS
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