1991
DOI: 10.1139/f91-233
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Organochlorine Concentrations in the Plankton of Lakes in Southern Ontario and Their Relationship to Plankton Biomass

Abstract: Hydrophobic organochlorine contaminants were surveyed in net plankton from 33 lakes in southern Ontario. Organochlorines were detected in all lakes. The relative concentrations of 12 common organochlorines were generally similar, suggesting that they derive from a common source, probably atmospheric transport. Variability in relative abundances of these contaminants increased with contaminant concentration, while contaminant concentration was related to plankton biomass, total phosphorus, and conductivity. Lak… Show more

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Cited by 123 publications
(93 citation statements)
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“…Additionally, when high nutrient availability stimulates rapid population growth of algae (39) and zooplankton (28), the processes of algal bloom dilution (40-42) and zooplankton density dilution (43), respectively, may further reduce zooplankton MeHg concentrations. Consistent with our findings for MeHg, studies of other biologically persistent contaminants have found negative relationships between total P and fish concentrations for PCBs (44,45) and other chlorinated hydrocarbons (46). Thus, low C:P stoichiometry may cause a combination of multiple dilution processes that influences the accumulation of MeHg and other persistent contaminants in freshwater organisms.…”
Section: Discussionsupporting
confidence: 90%
“…Additionally, when high nutrient availability stimulates rapid population growth of algae (39) and zooplankton (28), the processes of algal bloom dilution (40-42) and zooplankton density dilution (43), respectively, may further reduce zooplankton MeHg concentrations. Consistent with our findings for MeHg, studies of other biologically persistent contaminants have found negative relationships between total P and fish concentrations for PCBs (44,45) and other chlorinated hydrocarbons (46). Thus, low C:P stoichiometry may cause a combination of multiple dilution processes that influences the accumulation of MeHg and other persistent contaminants in freshwater organisms.…”
Section: Discussionsupporting
confidence: 90%
“…(5). Jack Lake (44°42'N, 78°02'W) is a dystrophic lake with numerous cottages along the shores but no industry, and it has only background levels of organochlorine contaminants in plankton (1). These levels are consistent with Ontario lakes that are contaminated primarily through atmospheric deposition (18 (Fig.…”
mentioning
confidence: 61%
“…Environ Health P"epet 106:253-260 (1998). [Online 30 March 1998] http:/tehpnetl.niehs.nihb.gov/docsv/d 998/106p253-260desoll/abstract.htmml Aquatic ecosystems have been contaminated with pesticides and industrial chemicals on a global scale (1). Organochlorine compounds are of particular significance because of their persistence, tissue specificity, widespread use, and toxicity.…”
mentioning
confidence: 99%
“…Furthermore, another main process affecting water quality in lakes, estuarine and coastal areas is eutrophication, which can influence the airwater exchange and subsequently the bioaccumulation of POPs (Dachs et al, 2000). For example, lower PCB concentrations occurred in organisms from eutrophic environments due to the dilution effect of phytoplankton, which suggested that rapid phytoplankton growth led to the short term decrease of the levels of POPs because the energy-consuming process of growth continuously diluted their concentrations in organic carbon phase (Axelman et al, 1997;Taylor et al, 1991).…”
Section: Introductionmentioning
confidence: 99%