Hoang Tham C, Rogevich Emily C, Rand Gary M, Gardinali Piero R, Frakes Robert A, Bargar Timothy A
Florida International University, Department of Environmental Studies, Ecotoxicology & Risk Assessment, Southeast Environmental Research Center, 3000 NE 151st Street, North Miami, FL 33181, USA.
Environ Pollut. 2008 Jul;154(2):338-47. doi: 10.1016/j.envpol.2007.09.024. Epub 2008 Feb 20.
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.
对从根据《大沼泽地综合恢复计划》获得的农业用地土壤中铜（Cu）的解吸及其对佛罗里达苹果螺的毒性进行了研究。11种淹水土壤中的铜浓度在第0天为5至234毫克/千克，在第28天（稳态）为6.2至204毫克/千克。上覆水中的稳态铜浓度范围为9.1至308.2微克/升。在一项为期28天的生长研究中，在测试的三种土壤处理中的两种中，蜗牛在9至16天内出现了高死亡率。在这两种处理中，苹果螺在28天内的生长受到铜的影响。与对照组相比，暴露于三种土壤处理的蜗牛在第14天时组织中的铜浓度高出12至23倍。濒危的佛罗里达蜗牛鸢及其主要食物来源佛罗里达苹果螺，在这些管理的农业土壤 - 水生态系统中可能面临铜暴露的风险。
