Ecotoxicological tools in support of the aims of the European Water Framework Directive: A step towards a more holistic ecosystem-based approach

Martínez-Haro, Mónica; Acevedo, Pelayo; Pais-Costa, Antónia Juliana; Neto, João M.; Vieira, Luís R.; Ospina-Alvarez, Natalia; Taggart, Mark A.; Guilhermino, Lúcia; Ribeiro, Rui; Marques, João

doi:10.1016/j.ecolind.2022.109645

Cited by 4 publications

(3 citation statements)

References 70 publications

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“…If performed at all, chemical analysis of a limited number of contaminants does not accurately characterize the complex contaminant mixtures present in polluted sediments nor the actual exposure of organisms, expressed as the freely dissolved concentration, the chemical activity, or the bioaccessibility. Alternatively, bioassays may be employed as they respond to all known and unknown bioavailable contaminants present . Yet, bioassay results are sometimes difficult to interpret as the observed adverse effects may be caused by a variety of (un)known stressors .…”

Section: Introductionmentioning

confidence: 99%

“…3−6 Nonetheless, contaminated sediments are largely overlooked in water quality assessments performed according to the European Union Water Framework Directive (EU-WFD), 5,7 which requires member states to monitor 45 priority substances in the water, but not in the sediment. 8 If performed at all, chemical analysis of a limited number of contaminants does not accurately characterize the complex contaminant mixtures present in polluted sediments 9 nor the actual exposure of organisms, expressed as the freely dissolved concentration, the chemical activity, or the bioaccessibility. Alternatively, bioassays may be employed as they respond to all known and unknown bioavailable contaminants present.…”

Section: Introductionmentioning

confidence: 99%

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Combining Passive Sampling and Dosing to Unravel the Contribution of Hydrophobic Organic Contaminants to Sediment Ecotoxicity

Wieringa,

Droge,

Ter Laak

et al. 2023

Environ. Sci. Technol.

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Contaminated sediments are ubiquitous repositories of pollutants and cause substantial environmental risks. Results of sediment bioassays remain difficult to interpret, however, as observed effects may be caused by a variety of (un)known stressors. This study aimed therefore to isolate the effects of hydrophobic organic contaminants from other (non)chemical stressors present in contaminated sediments, by employing a newly developed passive sampling−passive dosing (PSPD) test. The results showed that equilibrium partitioning between pesticides or polyaromatic hydrocarbons (PAHs) in contaminated sediments and a silicone rubber (SR) passive sampler was achieved after 1−3 days. Chlorpyrifos concentrations in pore water of spiked sediment matched very well with concentrations released from the SR into an aqueous test medium, showing that SR can serve as a passive dosing device. Subjecting the 96 h PSPD laboratory bioassay with nonbiting midge (Chironomus riparius) larvae to field-collected sediments showed that at two locations, concentrations of the hydrophobic organic contaminant mixtures were high enough to affect the test organisms. In conclusion, the developed PSPD test was able to isolate the effects of hydrophobic organic contaminants and provides a promising simplified building block for a suite of PSPD tests that after further validation could be used to unravel the contribution of hydrophobic organic chemicals to sediment ecotoxicity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combining Passive Sampling and Dosing to Unravel the Contribution of Hydrophobic Organic Contaminants to Sediment Ecotoxicity

Wieringa,

Droge,

Ter Laak

et al. 2023

Environ. Sci. Technol.

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“…Ecotoxicological tools can provide added value for monitoring the true state of river quality, considering contaminants potentially present at concentrations high enough to cause biological effects (Martinez-Haro et al, 2022). Bioassays performed on sediments dredged from canals have previously shown the importance of phytotoxicity tests in determining the risks related to their deposits (Bedell et al, 2003;Perrodin et al, 2006;Lecomte et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Combined Chemical and Ecotoxicological Measurements for River Sediment Management in an On-Land Deposit Scenario

Bedell

Dendievel

Gosset

et al. 2023

Arch Environ Contam Toxicol

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Sediment management along engineered river systems includes dredging operations and sediment deposition in the sea (capping) or on land. Thus, determining the ecotoxicological risk gradient associated with river sediments is critical. In this study, we investigated sediment samples along the Rhône River (France) and conducted Environmental Risk Assessment (ERA) tests with the idea to evaluate them in the future for deposit on soil. Based on an on-land deposit scenario, the capacity of the sediment samples from four sites (LDB, BER, GEC, and TRS) to support vegetation was evaluated by characterising the physical and chemical parameters (pH, conductivity, total organic carbon, grain size, C/N, potassium, nitrogen, and selected pollutants, including polychlorinated biphenyls (PCBs) and metal trace elements. All tested sediments were contaminated by metallic elements and PCBs as follows:LDB > GEC > TRS > BER, but only LDB had levels higher than the French regulatory threshold S1. Sediment ecotoxicity was then assessed using acute (plant germination and earthworm avoidance) and chronic (ostracod test and earthworm reproduction) bioassays. Two of the tested plant species, Lolium perenne (ray grass) and Cucurbita pepo (zucchini), were highly sensitive to sediment phytotoxicity. Acute tests also showed significant inhibition of germination and root growth, with avoidance by Eisenia fetida at the least contaminated sites (TRS and BER).Chronic bioassays revealed that LDB and TRS sediment were significantly toxic to E. fetida and Heterocypris incongruens (Ostracoda), and GEC sediment was toxic for the latter organism. In this on-land and spatialised deposit scenario, river sediment from the LDB site (Lake Bourget marina) presented the highest potential toxicity and required the greatest attention. However, low contamination levels can also lead to potential toxicity (as demonstrated for GEC and TRS site), underlining the importance of a multiple test approach for this scenario.

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Behavioral and biochemical patterns in the Andean highland macroinvertebrate Nectopsyche sp. after chronic mercury exposure

Lohs,

Villamarín,

Donoso

et al. 2023

Chemosphere

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Ecotoxicological tools in support of the aims of the European Water Framework Directive: A step towards a more holistic ecosystem-based approach

Cited by 4 publications

References 70 publications

Combining Passive Sampling and Dosing to Unravel the Contribution of Hydrophobic Organic Contaminants to Sediment Ecotoxicity

Combining Passive Sampling and Dosing to Unravel the Contribution of Hydrophobic Organic Contaminants to Sediment Ecotoxicity

Combined Chemical and Ecotoxicological Measurements for River Sediment Management in an On-Land Deposit Scenario

Behavioral and biochemical patterns in the Andean highland macroinvertebrate Nectopsyche sp. after chronic mercury exposure

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