Archives of Environmental Contamination and Toxicology ( IF 3.7 ) Pub Date : 2022-03-04 , DOI: 10.1007/s00244-022-00915-w Iñigo Moreno-Ocio 1 , Leire Méndez-Fernández 2 , Maite Martínez-Madrid 2 , Noemí Costas 3 , Isabel Pardo 3 , Pilar Rodriguez 1
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The study was performed on residue-effects datasets from polluted and unpolluted sites in the Nalón River basin (northern Spain). The effects were measured in terms of alteration of field macroinvertebrate communities, and measured as ecological status scores, and number of families and abundance of Ephemeroptera, Plecoptera and Trichoptera (EPT). Non-linear regression models of the field-measured tissue residues in 10 taxa related to the ecological status of the macroinvertebrate communities were used to derive effective tissue residues (ERs). These were estimated for the good/moderate boundary defined by the ecological quality ratio (EQRs) score and for the 50% reduction of EQR and EPT metrics. As, Cu, Hg and Se ERs were calculated for several macroinvertebrate taxa with different feeding styles. The ER dataset allowed us to estimate As and Cu hazardous concentrations (HC), using species sensitivity distribution models, and were interpreted as community thresholds. Further studies for Hg and Se are needed to complete the database required for HC estimation. The reliability and differences of the several thresholds were tested in a risk assessment using a tissue-residue approach (TRA) conducted with field organisms from Cauxa Creek, a tributary from the same basin exposed to high levels of metals in the sediments due to gold mining activities. This risk assessment identified that As and Cu tissue residues satisfactorily explained the reduction in the ecological status of the macroinvertebrate assemblages. Our results indicate that TRA can help in setting future environmental quality standards for the protection of aquatic biota.
Graphical Abstract
中文翻译：
开发As和Cu组织残留阈值以实现矿区河流良好生态状况
该研究是在纳隆河流域（西班牙北部）受污染和未受污染地点的残留效应数据集上进行的。这些影响是根据野外大型无脊椎动物群落的改变来衡量的，并以生态状况评分、蜉蝣目、鳞翅目和毛翅目（EPT）的科数和丰度来衡量。使用与大型无脊椎动物群落生态状况相关的 10 个分类群中现场测量的组织残留物的非线性回归模型来推导有效的组织残留物 (ER)。这些是根据生态质量比 (EQRs) 得分定义的良好/中等边界以及 EQR 和 EPT 指标减少 50% 进行估计的。计算了几种不同摄食方式的大型无脊椎动物分类群的 As、Cu、Hg 和 Se ER。ER 数据集允许我们使用物种敏感性分布模型估计 As 和 Cu 有害浓度 (HC)，并被解释为群落阈值。需要进一步研究 Hg 和 Se 以完成 HC 估算所需的数据库。使用组织残留方法 (TRA) 对来自 Cauxa Creek 的野外生物进行风险评估，测试了几个阈值的可靠性和差异，Cauxa Creek 是同一盆地的一条支流，由于金矿开采，沉积物中的金属含量很高活动。该风险评估确定，As 和 Cu 组织残留物令人满意地解释了大型无脊椎动物群落生态状况的下降。我们的研究结果表明，TRA 可以帮助制定未来保护水生生物群的环境质量标准。
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