Proposal of integrative scores and biomonitor selection for metal bioaccumulation risk assessment in mine-impacted rivers

Rodríguez, Pilar; Moreno-Ocio, Iñigo; Costas, Noemi; Pardo, Isabel; Méndez-Fernández, Leire

doi:10.1016/j.aquatox.2021.105918

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…Sediment metal concentration was assessed using the probable effect concentration (PEC: MacDonald et al 2000 ) and the sediment pollution score (SedPoll: Costas et al 2018 ) calculated from As, Cd, Cu, Hg, Pb and Se sediment concentrations in the Nalón River basin. In our previous contributions we described the baseline concentrations (Ecological Tissue threshold concentration, ETTC of 9 metals in several biomonitors of the Nalón River basin, Rodriguez et al 2018 ), and more recently a bioaccumulation risk assessment was done, using the number of times the baseline concentrations in selected biomonitor taxa were exceeded (Rodriguez et al 2021 ). In the present contribution, ERs were estimated on the same dataset for each taxon and metal from nonlinear regression models of the tissue residues (abscissa) vs EQRs (ordinate).…”

Section: Methodsmentioning

confidence: 99%

Developing As and Cu Tissue Residue Thresholds to Attain the Good Ecological Status of Rivers in Mining Areas

Moreno-Ocio

Méndez-Fernández

Costas

et al. 2022

Arch Environ Contam Toxicol

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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

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Section: Methodsmentioning

confidence: 99%

Developing As and Cu Tissue Residue Thresholds to Attain the Good Ecological Status of Rivers in Mining Areas

Moreno-Ocio

Méndez-Fernández

Costas

et al. 2022

Arch Environ Contam Toxicol

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“…In fact, arsenic appears in high concentrations in groundwater from geological sources, causing chronic health disorders [ 5 ]. Arsenic pollution in sediments and bioaccumulation has been demonstrated as one of the main causes of toxicity [ 3 ], and of the alteration of the ecological status in rivers affected by mining activities [ 6 , 7 ]. Integrating chemical analysis with biological endpoints can help in the monitoring and protection of aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Toxicogenomics of the Freshwater Oligochaete, Tubifex tubifex (Annelida, Clitellata), in Acute Water-Only Exposure to Arsenic

Moreno-Ocio,

Aquilino,

Llorente

et al. 2024

IJMS

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A toxicogenomic approach was used for toxicity evaluation of arsenic in the aquatic environment, and differential gene expression was investigated from 24 h and 96 h water-only acute toxicity tests with the aquatic oligochaete, Tubifex tubifex (Annelida, Clitellata). Several toxicological endpoints (survival and autotomy) of the oligochaete and tissue residues were measured, and dose-response modelling of gene expression data was studied. A reference transcriptome of the aquatic oligochaete, T. tubifex, was reconstructed for the first time, and genes related to cell stress response (Hsc70, Hsp10, Hsp60, and Hsp83), energy metabolism (COX1), oxidative stress (Cat, GSR, and MnSOD), and the genes involved in the homeostasis of organisms (CaM, RpS13, and UBE2) were identified and characterised. The potential use of the genes identified for risk assessment in freshwater ecosystems as early biomarkers of arsenic toxicity is discussed.

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Proposal of integrative scores and biomonitor selection for metal bioaccumulation risk assessment in mine-impacted rivers

Cited by 2 publications

References 33 publications

Developing As and Cu Tissue Residue Thresholds to Attain the Good Ecological Status of Rivers in Mining Areas

Developing As and Cu Tissue Residue Thresholds to Attain the Good Ecological Status of Rivers in Mining Areas

Toxicogenomics of the Freshwater Oligochaete, Tubifex tubifex (Annelida, Clitellata), in Acute Water-Only Exposure to Arsenic

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