Selenium and other trace metals in fish inhabiting a fly ash stream: Implications for regulatory tissue thresholds

Reash, Robin J.; Lohner, Timothy W.; Wood, Kenneth V.

doi:10.1016/j.envpol.2005.10.025

Cited by 25 publications

(22 citation statements)

References 45 publications

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“…The mean selenium concentration of bluegill in the Savannah River, South Carolina and Georgia is 1.55 µg/g (Burger et al, 2001). Somewhat of a paradox is provided by the observations made by Reash et al (2006) in southeast Ohio; Reash et al (2006) reported a mean whole-body selenium concentration of 17.26 µg/g and range 6.15 − 51.64 µg/g in bluegill with no observed adverse effects on survival, teratogenesis, and reproductive failure. The results of this study contradicts previous reports showing population-level effects at much lower selenium concentrations than those found in southeast Ohio.…”

Section: Comparison With Field Datamentioning

confidence: 96%

“…An association between other trace metals have been observed to reduce the toxicity of selenium and other elements, and may provide a possible explanation for no evident population-level effects. But there is a lack of data to quantify a strong relationship (Reash et al, 2006). Concentrations as high as 50 µg/g (Reash et al, 2006) would certainly result in considerable population-level effects experiencing environmental stochasticity.…”

Section: Comparison With Field Datamentioning

confidence: 99%

“…But there is a lack of data to quantify a strong relationship (Reash et al, 2006). Concentrations as high as 50 µg/g (Reash et al, 2006) would certainly result in considerable population-level effects experiencing environmental stochasticity. But with high S b and minimal environmental variability, it is also possible to experience little population-level effects.…”

Section: Comparison With Field Datamentioning

confidence: 99%

“…Whole-body selenium concentrations in bluegill range from 0.43 − 51.64 µg/g dry weight in natural settings. Frequently observed wholebody selenium concentrations range from 0.6 -4.1 µg/g (Ikem and Egilla, 2008;Reash et al, 2006;Burger et al, 2001;Nakamoto and Hassler, 1992;Saiki et al, 1992Saiki et al, , 2001Saiki and May, 1988). Extensive studies have been conducted in the San Joaquin River…”

Section: Comparison With Field Datamentioning

confidence: 99%

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Modeling effects of toxin exposure in fish on long-term population size, with an application to selenium toxicity in bluegill (Lepomis macrochirus)

Gledhill

Kirk

2011

Ecological Modelling

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MODELING EFFECTS OF TOXIN EXPOSURE IN FISH ON LONG-TERM POPULATION SIZE, WITH AN APPLICATION TO SELENIUM TOXICITY IN BLUEGILL (LEPOMIS MACROCHIRUS)Michelle Gledhill A primary goal in ecotoxicology is the prediction of population-level effects of contaminant exposure based on individual-level response. Assessment of toxicity at the population level has predominately focused on the population growth rate (PGR), but the PGR may not be a relevant toxicological endpoint for populations at equilibrium. Equilibrium population size may be a more meaningful endpoint than the PGR because a population with smaller equilibrium (i.e., long-term mean) size is more susceptible to the negative effects of environmental variability. I address the ecotoxicology individual-to-population extrapolation problem with modeling. I developed and analyzed a general model applicable to many freshwater fish species that includes density-dependent juvenile survival and additional juvenile mortality due to toxicity exposure, and I quantified its effect on equilibrium population size as a means of assessing toxicity. I then used selenium toxicity in bluegill sunfish as an example to assess the effects of environmental stochasticity on toxicity response with simulation modeling. Individual-level effects are typically greater than population-level effects until the individual effect is large, due to compensatory density-dependent relationships. These effects are sensitive to the recruitment potential of a population, in particular the low-density first-year survival rate S b . Assuming high S b could result in underestimating effects of population-level toxicity. The equilibrium size depends directly on S b , the reproductive potential, the toxin concentration at which mean mortality is 50% (LC 50 ), and iii the rate at which individual mortality increases with increasing toxin concentration. More experimental data are needed to decrease the uncertainty in estimating these parameters.Effects of environmental variability resulted in simulated extinctions at much lower toxin concentrations than predicted deterministically. iv ACKNOWLEDGEMENTS

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Section: Comparison With Field Datamentioning

confidence: 96%

Section: Comparison With Field Datamentioning

confidence: 99%

Section: Comparison With Field Datamentioning

confidence: 99%

Section: Comparison With Field Datamentioning

confidence: 99%

See 2 more Smart Citations

Modeling effects of toxin exposure in fish on long-term population size, with an application to selenium toxicity in bluegill (Lepomis macrochirus)

Gledhill

Kirk

2011

Ecological Modelling

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“…Sample and Suter II (2002) also highlighted the ecological risks posed to terrestrial wildlife associated with coal ash disposal sites. Of the different contaminants found in fly ash, trace elements are considered serious environmental contaminants due to: (1) their mobilization and bioaccumulation in food chain via plants, (2) contamination of waters due to leaching, and (3) their toxicity to biota (Carlson and Adriano 1993;Adriano et al 2002;Brake et al 2004;Reash et al 2006). The issue that fly ash is nonhazardous, but some of the trace elements present in it are toxic is yet to be reconciled (Rubin 1999).…”

Section: Introductionmentioning

confidence: 96%

Comparative study on elemental composition and DNA damage in leaves of a weedy plant species, Cassia occidentalis, growing wild on weathered fly ash and soil

2009

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Open dumping of fly ash in fly ash basins has significant adverse environmental impacts due to its elevated trace element content. In situ biomonitoring of genotoxicity is of practical value in realistic hazard identification of fly ash. Genotoxicity of openly disposed fly ash to natural plant populations inhabiting fly ash basins has not been investigated. DNA damage, and concentrations of As, Co, Cr, Cu and Ni in the leaves of natural populations of Cassia occidentalis growing at two contrasting sites-one having weathered fly ash (fly ash basin) and the other having soil (reference site) as plant growth substrates-were assessed. The foliar concentrations of As, Ni and Cr were two to eight fold higher in plants growing on fly ash as compared to the plants growing on soil, whereas foliar concentrations of Cu and Co were similar. We report, for the first time, based upon comet assay results, higher levels of DNA damage in leaf tissues of Cassia occidentalis growing wild on fly ash basin compared to C. occidentalis growing on soil. Correlation analysis between foliar DNA damage and foliar concentrations of trace elements suggests that DNA damage may perhaps be associated with foliar concentrations of As and Ni. Our observations suggest that (1) fly ash triggers genotoxic responses in plants growing naturally on fly ash basins; and (2) plant comet assay is useful for in situ biomonitoring of genotoxicity of fly ash.

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Selenium, arsenic, and mercury in fish inhabiting a fly ash exposure gradient: interspecific bioaccumulation patterns and elemental associations

Reash¹

2012

Enviro Toxic and Chemistry

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Releases from coal ash impoundments can be a significant source of trace elements to the aquatic environment. In the present study, whole-body concentrations of As, Hg, and Se in various fish species inhabiting streams receiving a gradient of fly ash exposure are reported. High-exposure sites had elevated water concentrations of As, Mo, Se, and SO(4) . Fish were collected during two seasons in 2007. Mercury concentrations in all fish samples were low (range = 1.2-99 ng/g wet wt); highest As concentrations occurred in fish from high-exposure sites. Whole-body Se concentrations were low at reference sites but increased as the magnitude of fly exposure increased. For all sites combined, a significant (r(2) = 0.60) correlation was observed between the geometric mean of each species' whole-body Se concentration and log-transformed water Se concentration. A significant inverse relationship was apparent with log-transformed whole-body Hg and Se concentrations (r(2) = 0.56 for all species and sites combined), suggesting that high tissue Se levels antagonistically regulated Hg bioaccumulation. Sunfish (Lepomis sp.) from high- and medium-exposure sites had significantly higher Se body residues, but significantly lower Hg, relative to fish from low-exposure and reference sites. Ninety percent of fish from high-exposure sites had a surplus of Se, whereas all fish from reference sites had Se/Hg molar ratios <1.0. These ratios increased as water Se increased. Where fish have moderate to high exposure to fly ash-influenced water, Se tissue levels can be expected to be elevated (as well as As, in some cases), but tissue Hg concentrations will likely be low.

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Selenium and other trace metals in fish inhabiting a fly ash stream: Implications for regulatory tissue thresholds

Cited by 25 publications

References 45 publications

Modeling effects of toxin exposure in fish on long-term population size, with an application to selenium toxicity in bluegill (Lepomis macrochirus)

Modeling effects of toxin exposure in fish on long-term population size, with an application to selenium toxicity in bluegill (Lepomis macrochirus)

Comparative study on elemental composition and DNA damage in leaves of a weedy plant species, Cassia occidentalis, growing wild on weathered fly ash and soil

Selenium, arsenic, and mercury in fish inhabiting a fly ash exposure gradient: interspecific bioaccumulation patterns and elemental associations

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