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首页> 外文期刊>Archives of Environmental Contamination and Toxicology >The extent of benthic impacts of CCA-treated wood structures in Atlantic Coast estuaries
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The extent of benthic impacts of CCA-treated wood structures in Atlantic Coast estuaries

机译：经CCA处理的木结构在大西洋沿岸河口的底栖影响程度

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To ascertain the extent of impacts from CCA-treated wood bulkheads, we sampled sediments along 10-m transects from these bulkheads and from reference sites (either bulkheads made of other materials or unbulkheaded areas nearby) and analyzed the fine fraction for metals. We ascertained metal content in resident biota, and analyzed species richness, Shannon-Wiener diversity index, and biomass of the benthic community. We found accumulation of metals in the fine-grained portion of nearby sediments and reduction in the biotic community nearby (generally at 0 and 1 m); such gradients were generally not seen in reference transects. At two of the sites there was evidence for secondary reduction of the community out further to 3 or 10 m, where the metals in the fines were lower but the percent fines was greatly increased. At all the other sites, impacts were generally limited to 0 and 1 m. The lack of reduction at further distances at the other sites is attributed to factors such as the age of the bulkheads, high energy of the environment, or nature of the sediments at those sites. [References: 26]
机译：为了确定受到CCA处理的木材舱壁的影响程度，我们从这些舱壁和参考点（由其他材料制成的舱壁或附近的无凸头区域）沿10米长的样线取样了沉积物，并分析了细颗粒中的金属。我们确定了居民区中的金属含量，并分析了底栖群落的物种丰富度，Shannon-Wiener多样性指数和生物量。我们发现附近沉积物的细粒部分有金属积累，附近的生物群落减少（通常在0和1 m）;通常在参考样条中看不到这种梯度。在这两个地点，有证据表明社区进一步减少到3或10 m，其中细粉中的金属含量较低，但细粉百分比却大大提高了。在所有其他站点，影响通常限制在0和1 m。其他地点距离较远的地方没有减少，这是由于诸如舱壁的年龄，环境的高能量或这些地点的沉积物性质等因素造成的。 [参考：26]

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