Copper desorption in flooded agricultural soils and toxicity to the Florida apple snail (Pomacea paludosa): Implications in Everglades restoration

Hoang, Tham C.; Rogevich, Emily C.; Rand, Gary M.; Gardinali, Piero R.; Frakes, Robert A.; Bargar, Timothy A.

doi:10.1016/j.envpol.2007.09.024

Cited by 39 publications

(30 citation statements)

References 28 publications

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“…The Cu concentrations in overlying water from reference and contaminated soils increased with time even though soils were flooded and held for 2 weeks prior to the addition of snails. According to Koster et al (2006) and Hoang et al (2008), Cu concentrations in overlying water reached saturation state after 2 weeks but there were no snails in these a For juvenile study: nominal concentrations for treatment 1 = 3 lg/l Cu, treatment 2 = 6 lg/l Cu, treatment 3 = 12 lg/l Cu. For adult study: treatment 1 = contaminated soil, Cu-free food nitex; treatment 2 = contaminated soil, Cu-free food, no nitex; treatment 3 = reference soil, Cu-free food, no nitex; treatment 4 = reference soil, Cu-treated food, no nitex b Cu was measured at day 0, 14, 28 c Cu was measured before organisms were placed in d Cu was measured in overlying water after 2 weeks flooding soil studies.…”

Section: Resultsmentioning

confidence: 99%

“…Four 492-l polyethylene tanks containing 76 l of soil (20 gallons) were flooded with 152 l of laboratory freshwater and held for 2 weeks prior to the addition of P. paludosa. According to the study by Hoang et al (2008), the soil/ water system reached Cu equilibrium in overlying water after 2 weeks. The soil Cu bioaccumulation factor was the ratio of the Cu uptake concentration from soil to the soil Cu concentration.…”

Section: Adult Uptake Studymentioning

confidence: 99%

“…Reference soil in treatments 3 and 4 were collected from the Sunrise Boys property, a citrus agriculture site in Palm Beach County, Florida. Physical and chemical characteristics of all soils are presented in Hoang et al (2008). Following exposure, P. paludosa in all treatments were allowed to depurate for 14 days in carbon filtered, UV-sterilized freshwater (laboratory freshwater).…”

Section: Adult Uptake Studymentioning

confidence: 99%

“…The Implementation of the Comprehensive Everglades Restoration Plan (CERP) under the Water Resources Development Act of 2000 requires acquisition of thousands of acres of land in these counties for maintaining hydrologic buffer areas and for the creation of storm water treatment areas, water storage reservoirs and wetlands (Everglades National Park 2001). A recent study conducted by Hoang et al (2008) found that dissolved Cu concentrations in over-lying water collected from flooded soils originating from these counties were as high as 300 lg/l, depending on initial Cu concentrations in soils. However, concentrations of dissolved organic carbon (DOC) were also high (up to 51 mg/l DOC) in overlying water.…”

Section: Introductionmentioning

confidence: 98%

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Copper uptake and depuration by juvenile and adult Florida apple snails (Pomacea paludosa)

et al. 2008

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The present study characterized copper (Cu) uptake and depuration by juvenile and adult Florida apple snails (Pomacea paludosa) from water, soil, and diet. During a 28-day uptake period, juvenile apple snails were exposed to aqueous Cu and adult apple snails were exposed to Cu-contaminated soil, water, and food. In the follow-up 14-day depuration period, both juvenile and adult apple snails were held in laboratory freshwater with background Cu concentrations<4 microg/l. For juvenile apple snails, whole body Cu concentrations increased with time and reached a plateau after 14 days. The data followed Michaelis-Menten kinetics rather than a one compartment first order kinetics model. The mean Cu bioconcentration factor (BCF) for juvenile apple snails was 1493 and the depuration half-life was 10.5-13.8 days. For adult snails, dietary uptake of Cu resulted in higher bioaccumulation factors (BAFs) compared to uptake from soil. Most of the accumulated Cu was located in soft tissue (about 60% in the viscera and 40% in the foot). The shell contained <1% of the total accumulated copper. Soft tissue is usually consumed by predators of the apple snail. Therefore, the results of the present study show that Cu transfer through the food chain to the apple snail may lead to potential risk to its predators.

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Section: Resultsmentioning

confidence: 99%

Section: Adult Uptake Studymentioning

confidence: 99%

Section: Adult Uptake Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Copper uptake and depuration by juvenile and adult Florida apple snails (Pomacea paludosa)

et al. 2008

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“…Reports on these soils indicate Cu concentrations as high as 1,200 mg/kg, dw (SFWMD 2001(SFWMD -2006. Our earlier study found high Cu concentrations in overlying water as a result of Cu desorption from a single flooding of citrus agricultural soils (Hoang et al 2008a). Desorbed Cu from flooded soils also adversely affected the survival and growth of the Florida apple snail, an important food resource for many species, including the federally endangered Everglades snail kite (Hoang et al 2008a, b).…”

Section: Introductionmentioning

confidence: 96%

Copper Release, Speciation, and Toxicity Following Multiple Floodings of Copper Enriched Agriculture Soils: Implications in Everglades Restoration

Hoang

Schuler

Rogevich

et al. 2008

Water Air Soil Pollut

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This study characterizes the effects of water-soil flooding volume ratio and flooding time on copper (Cu) desorption and toxicity following multiple floodings of field-collected soils from agricultural sites acquired under the Comprehensive Everglades Restoration Plan (CERP) in south Florida. Soils from four field sites were flooded with three water-soil ratios (2, 4, and 6 [water] to 1 [soil]) and held for 14 days to characterize the effects of volume ratio and flooding duration on Cu desorption (volume ratio and flooding duration study). Desorption of Cu was also characterized by flooding soils four times from seven field sites with a volume ratio of 2 (water) to 1 (soil) (multiple flooding study). Acute toxicity tests were also conducted using overlying waters from the first flooding event to characterize the effects of Cu on the survival of fathead minnows (Pimephales promelas), cladocerans (Daphnia magna), amphipods (Hyalella azteca), midges (Chironomus tentans), duckweed (Lemna minor), and Florida apple snails (Pomacea paludosa). Acute tests were also conducted with D. magna exposed to overlying water from the second and third flooding events. Results indicate that dissolved Cu concentrations in overlying water increased with flooding duration and decreased with volume ratio. In the multiple flooding study, initial Cu concentrations in soils ranged from 5 to 223 mg/kg (dw) and were similar to Cu concentration after four flooding events, indicating retention of Cu in soils. Copper desorption was dependent on soil Cu content and soil characteristics. Total Cu concentration in overlying water (Cu w ) was a function of dissolved organic carbon (DOC), alkalinity, and soil Cu concentration (Cu s ): log(Cu w )= 1.2909 +0.0279 (DOC)+ 0.0026 (Cu s )−0.0038 (alkalinity). The model was validated and highly predictive. Most of the desorbed Cu in the water column complexed with organic matter in the soils and accounted for 99% of the total dissolved Cu. Although total dissolved Cu concentrations in overlying water did not significantly decrease with number of flooding events, concentrations of free Cu 2+ increased with the number of Water Air Soil Pollut (flooding events, due to a decrease in DOC concentrations. The fraction of bioavailable Cu species (Cu 2+ , CuOH + , CuCO 3 ) was also less than 1% of the total Cu. Overlying water from the first flooding event was only acutely toxic to the Florida apple snail from one site. However, overlying water from the third flooding of six out of seven soils was acutely toxic to D. magna. The decrease in DOC concentrations and increase in bioavailable Cu 2+ species may explain the changes in acute toxicity to D. magna. Results of this study reveal potential for high Cu bioavailability (Cu 2+ ) and toxicity to aquatic biota overtime in inundated agricultural lands acquired under the CERP.

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Influence of water quality on zinc toxicity to the Florida apple snail (Pomacea paludosa) and sensitivity of freshwater snails to zinc

Hoang

Tong

2015

Enviro Toxic and Chemistry

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The present study characterized the influence of water-quality characteristics on zinc (Zn) toxicity to the Florida apple snail (Pomacea paludosa) and the sensitivity of freshwater snails to Zn. Standard 96-h renewal acute toxicity tests were conducted with Zn and juvenile P. paludosa under 3 conditions of pH and alkalinity, water hardness, and dissolved organic carbon (DOC). Median lethal effect concentrations (96-h LC50s), no-observed- effect concentrations, lowest-observed-effect concentrations, LC10s, and LC20s were determined for each test. The results showed that Zn toxicity to P. paludosa decreased linearly with increasing hardness, pH, and DOC. A multiple linear regression model based on pH, hardness, and DOC was able to explain 99% of the observed variability in LC50s. These results are useful for the development of a biotic ligand model (BLM) for P. paludosa and Zn. Zinc acute toxicity data were collected from the literature for 12 freshwater snail species in a wide range of water-quality characteristics for species sensitivity distribution analysis. The results showed that P. paludosa is the second most sensitive to Zn. The present study also suggested that aqueous ZnCO3 and ZnHCO3 (-) can be bioavailable to P. paludosa. Therefore, bioavailability models (e.g., BLM) should take these Zn species into consideration for bioavailability when applied to snails.

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Copper desorption in flooded agricultural soils and toxicity to the Florida apple snail (Pomacea paludosa): Implications in Everglades restoration

Cited by 39 publications

References 28 publications

Copper uptake and depuration by juvenile and adult Florida apple snails (Pomacea paludosa)

Copper uptake and depuration by juvenile and adult Florida apple snails (Pomacea paludosa)

Copper Release, Speciation, and Toxicity Following Multiple Floodings of Copper Enriched Agriculture Soils: Implications in Everglades Restoration

Influence of water quality on zinc toxicity to the Florida apple snail (Pomacea paludosa) and sensitivity of freshwater snails to zinc

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