Rhea Darren T, Harper David D, Farag Aïda M, Brumbaugh William G
US Geological Survey, Columbia Environmental Research Center, Jackson Field Research Station, Jackson, WY, USA.
Environ Monit Assess. 2006 Apr;115(1-3):381-93. doi: 10.1007/s10661-006-7086-7. Epub 2006 Apr 28.
Portions of the Boulder River watershed contain elevated concentrations of arsenic, cadmium, copper, lead, and zinc in water, sediment, and biota. We measured concentrations of As, Cd, Cu, Pb, and Zn in biofilm and macroinvertebrates, and assessed macroinvertebrate assemblage and aquatic habitat with the objective of monitoring planned remediation efforts. Concentrations of metals were generally higher in downstream sites compared with upstream or reference sites, and two sites contained metal concentrations in macroinvertebrates greater than values reported to reduce health and survival of resident trout. Macroinvertebrate assemblage was correlated with metal concentrations in biofilm and macroinvertebrates. However, macroinvertebrate metrics were significantly correlated with a greater number of biofilm metals (8) than metals in invertebrates (4). Lead concentrations in biofilm appeared to have the most significant impact on macroinvertebrate assemblage. Metal concentrations in macroinvertebrates were directly proportional to concentrations in biofilm, indicating biofilm as a potential surrogate for monitoring metal impacts in aquatic systems.
博尔德河流域的部分区域，水体、沉积物和生物群中的砷、镉、铜、铅和锌浓度升高。我们测量了生物膜和大型无脊椎动物中砷、镉、铜、铅和锌的浓度，并评估了大型无脊椎动物群落和水生栖息地，目的是监测计划中的修复工作。与上游或参考站点相比，下游站点的金属浓度通常更高，有两个站点的大型无脊椎动物中的金属浓度高于据报道会降低当地鳟鱼健康和存活率的值。大型无脊椎动物群落与生物膜和大型无脊椎动物中的金属浓度相关。然而，大型无脊椎动物指标与生物膜中的金属（8种）的相关性比与无脊椎动物中的金属（4种）的相关性更强。生物膜中的铅浓度似乎对大型无脊椎动物群落影响最为显著。大型无脊椎动物中的金属浓度与生物膜中的浓度成正比，这表明生物膜可作为监测水生系统中金属影响的潜在替代指标。
