1. Copper desorption in flooded agricultural soils and toxicity to the Florida apple snail (Pomacea paludosa): implications in Everglades restoration.
- Author
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Hoang TC, Rogevich EC, Rand GM, Gardinali PR, Frakes RA, and Bargar TA
- Subjects
- Agriculture, Animals, Carbon analysis, Chromatography, Thin Layer, Conservation of Natural Resources, Copper toxicity, Environmental Monitoring methods, Florida, Fresh Water, Snails metabolism, Soil Pollutants toxicity, Solubility, Toxicity Tests, Water Pollutants, Chemical analysis, Copper analysis, Disasters, Snails drug effects, Soil analysis, Soil Pollutants analysis
- Abstract
Copper (Cu) desorption and toxicity to the Florida apple snail were investigated from soils obtained from agricultural sites acquired under the Comprehensive Everglades Restoration Plan. Copper concentrations in 11 flooded soils ranged from 5 to 234 mg/kg on day 0 and from 6.2 to 204 mg/kg on day 28 (steady-state). The steady-state Cu concentration in overlying water ranged from 9.1 to 308.2 microg/L. In a 28-d growth study, high mortality in snails occurred within 9 to 16 d in two of three soil treatments tested. Growth of apple snails over 28 d was affected by Cu in these two treatments. Tissue Cu concentrations by day 14 were 12-23-fold higher in snails exposed to the three soil treatments compared to controls. The endangered Florida snail kite and its main food source, the Florida apple snail, may be at risk from Cu exposure in these managed agricultural soil-water ecosystems.
- Published
- 2008
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