Frakes Robert A, Bargar Timothy A, Bauer Emily A
Environmental Contaminants Program, U.S. Fish and Wildlife Service, 1339 20th Street, Vero Beach, FL 32960, USA.
Ecotoxicology. 2008 Oct;17(7):598-604. doi: 10.1007/s10646-008-0233-x. Epub 2008 Aug 5.
Many properties being acquired as part of the Comprehensive Everglades Restoration Plan (CERP) are heavily contaminated with copper. Estimated copper bioaccumulation in the Florida apple snail (Pomacea paludosa) has led to the prediction of risk to the Everglade snail kite (Rostrhamus sociabilis plumbeus) at some CERP projects. Field study results presented in this paper examine the relationship between copper levels in sediments, snails, and other biota. Copper concentrations in all biota (snails, aquatic vascular plants, and periphyton) were strongly correlated with those in sediments. No correlation with water copper concentrations was evident. Mean copper concentrations in snails ranged from 23.9 mg/kg at the reference site to 732 mg/kg at a high copper site. Calculated biota-sediment accumulation factors (BSAFs) ranged from 36.7 to 7.0 over the range of copper levels in sediments. BSAFs were highest at low copper levels in sediments and declined sharply as copper levels in sediment increased. Risk for the snail kite is discussed in light of the results of this study.
作为大沼泽地综合恢复计划（CERP）一部分而获得的许多地产都受到了严重的铜污染。据估计，佛罗里达苹果螺（Pomacea paludosa）体内的铜生物累积情况，已导致预测在一些CERP项目中，大沼泽地蜗牛鸢（Rostrhamus sociabilis plumbeus）面临风险。本文展示的实地研究结果考察了沉积物、蜗牛及其他生物群中铜含量之间的关系。所有生物群（蜗牛、水生维管束植物和周丛生物）中的铜浓度与沉积物中的铜浓度密切相关。与水体中的铜浓度没有明显关联。蜗牛体内的平均铜浓度范围从参考地点的23.9毫克/千克到高铜含量地点的732毫克/千克。在沉积物中铜含量的范围内，计算得出的生物群 - 沉积物累积系数（BSAFs）在36.7至7.0之间。沉积物中铜含量较低时，BSAFs最高，随着沉积物中铜含量的增加而急剧下降。根据本研究结果对蜗牛鸢面临的风险进行了讨论。
