Aquatic Ecosystems, IRTA, E-43540 Sant Carles de la Ràpita, Tarragona, Catalonia, Spain.
Ecotoxicol Environ Saf. 2010 Mar;73(3):280-6. doi: 10.1016/j.ecoenv.2009.11.001. Epub 2009 Dec 6.
In the Ebro River basin, point and diffuse pollution of heavy metals stems mainly from industry and agriculture. Bioaccumulation patterns were examined under different pollution sources (point and diffuse) using levels of heavy metals (As, Cd, Cr, Cu, Hg, Pb and Zn) in abdominal muscle tissue of Procambarus clarkii. P. clarkii captured under point source effects presented the highest concentrations of Hg, Pb and As; and were related with distance to the source of industrial waste sediments. Mean Hg levels in crayfish exposed to point sources of metals significantly exceeded legal allowed values established by the European Union legislation. In the Ebro Delta, high levels of As, Cr, Cu and Zn were associated with traditional agriculture activity (diffuse pollution) as well. These results demonstrate the potential of P. clarkii to bioaccumulate heavy metals from both point and diffuse sources and hence potentially transfer these metals to higher trophic levels.
在埃布罗河流域，重金属的点源和扩散污染主要来自工业和农业。本研究采用重金属（砷、镉、铬、铜、汞、铅和锌）在美洲螯龙虾（Procambarus clarkii）腹部肌肉组织中的含量，研究了不同污染源（点源和扩散源）下的生物累积模式。在点源影响下捕获的美洲螯龙虾表现出最高浓度的汞、铅和砷，且与工业废物沉积物的源距离有关。暴露于金属点源的螯虾体内的汞含量平均值明显超过了欧盟立法规定的法定允许值。在埃布罗三角洲，高浓度的砷、铬、铜和锌也与传统农业活动（扩散污染）有关。这些结果表明，美洲螯龙虾有从点源和扩散源中积累重金属的潜力，并可能将这些金属转移到更高的营养级。
