Modelling the effects of pulse exposure of several PSII inhibitors on two algae

Copin, Pierre-Jean; Chèvre, Nathalie

doi:10.1016/j.chemosphere.2015.05.035

Cited by 11 publications

(6 citation statements)

References 43 publications

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“…used in our study. Studies with the green alga Scenedesmus vacuolatus(Copin and Chèvre, 2015) and P. duplex (this study) had the same sensitivity to atrazine (IC50 values of 50 (42-59) µg/L and 50 (40-59) µg/L, respectively).…”

mentioning

confidence: 65%

Development and application of a multispecies toxicity test with tropical freshwater microalgae

Stone

Adams

Stauber

et al. 2019

Environmental Pollution

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mentioning

confidence: 65%

Development and application of a multispecies toxicity test with tropical freshwater microalgae

Stone

Adams

Stauber

et al. 2019

Environmental Pollution

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“…The algal species most routinely tested for risk‐assessment purposes of plant protection products is the pelagic microalga Raphidocelis subcapitata (formerly known as Pseudokirchneriella subcapitata or Selenastrum capricornutum) . Models have been developed for both static (Copin and Chevre, ; Copin et al., ) and flow‐through growth systems (Weber et al., ), with the latter being the most elaborate model. Using flow‐through systems is the only way effects of variable exposures can be tested on microalgae growth without filtering or centrifuging the algae to separate them from the medium and keeping them in an exponential growth phase over a prolonged time span of days to weeks.…”

Section: Concepts and Examples For Tktd Modelling Approachesmentioning

confidence: 99%

Scientific Opinion on the state of the art of Toxicokinetic/Toxicodynamic (TKTD) effect models for regulatory risk assessment of pesticides for aquatic organisms

Ockleford¹,

Adriaanse²,

Berny³

et al. 2018

EFS2

157

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Following a request from EFSA, the Panel on Plant Protection Products and their Residues (PPR) developed an opinion on the state of the art of Toxicokinetic/Toxicodynamic (TKTD) models and their use in prospective environmental risk assessment (ERA) for pesticides and aquatic organisms. TKTD models are species-and compound-specific and can be used to predict (sub)lethal effects of pesticides under untested (time-variable) exposure conditions. Three different types of TKTD models are described, viz., (i) the 'General Unified Threshold models of Survival' (GUTS), (ii) those based on the Dynamic Energy Budget theory (DEBtox models), and (iii) models for primary producers. All these TKTD models follow the principle that the processes influencing internal exposure of an organism, (TK), are separated from the processes that lead to damage and effects/mortality (TD). GUTS models can be used to predict survival rate under untested exposure conditions. DEBtox models explore the effects on growth and reproduction of toxicants over time, even over the entire life cycle. TKTD model for primary producers and pesticides have been developed for algae, Lemna and Myriophyllum. For all TKTD model calibration, both toxicity data on standard test species and/or additional species can be used. For validation, substance and species-specific data sets from independent refined-exposure experiments are required. Based on the current state of the art (e.g. lack of documented and evaluated examples), the DEBtox modelling approach is currently limited to research applications. However, its great potential for future use in prospective ERA for pesticides is recognised. The GUTS model and the Lemna model are considered ready to be used in risk assessment. This is an open access article under the terms of the Creative Commons Attribution-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited and no modifications or adaptations are made.The EFSA Journal is a publication of the European Food Safety Authority, an agency of the European Union. As a third deliverable of this mandate, the PPR Panel is asked to develop a Scientific Opinion describing the state of the art of Toxicokinetic/Toxicodynamic (TKTD) models for aquatic organisms and prospective environmental risk assessment (ERA) for pesticides with the main focus on: (i) regulatory questions that can be addressed by TKTD modelling, (ii) available TKTD models for aquatic organisms, (iii) model parameters that need to be included and checked in evaluating the acceptability of regulatory relevant TKTD models, and (iv) selection of the species to be modelled.Chapter 2 presents the underlying concepts, terminology, application domains and complexity levels of three different classes of TKTD models intended to be used in risk assessment, viz., (i) the 'General Unified Threshold models of Survival' (GUTS), (ii) toxicity models derived from the Dynamic Energy Budget theory (DEBtox models), and (iii) models for primary producers. All ...

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“…All species resulted in an order of toxicity of diuron > hexazinone > atrazine for both IC10 and IC50 values. Copin and Chèvre (2015) also reported that population growth in a freshwater green alga, Scenedesmus vacuolatus , was more sensitive to diuron than atrazine. Consistent with the results of the present study, a review of literature by Smith et al (2017) investigating herbicide toxicity to freshwater, estuarine, and marine phototrophic species found that diuron was generally more toxic than hexazinone, followed by atrazine.…”

Section: Discussionmentioning

confidence: 96%

Toxicity of Herbicide Mixtures to Tropical Freshwater Microalgae Using a Multispecies Test

Stone

Adams

Stauber

et al. 2020

Enviro Toxic and Chemistry

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Agriculture within the Great Barrier Reef catchment area has contributed to pesticide contamination of adjacent freshwater ecosystems that flow into the Great Barrier Reef World Heritage Area. A novel multispecies toxicity test was used to assess the toxicity of diuron and hexazinone, 2 herbicides commonly detected within the Great Barrier Reef catchment area, to a community of 3 tropical freshwater microalgae: Monoraphidium arcuatum, Nannochloropsis‐like sp., and Pediastrum duplex. Diuron was the most toxic herbicide, with 10% inhibition concentration (IC10) values of 4.3, 7.1, and 29 µg/L for P. duplex, M. arcuatum, and Nannochloropsis‐like sp., respectively, followed by hexazinone, with IC10 values of 15, 18, and 450 µg/L, respectively Toxicity testing on 2 commercial formulations (Barrage, 13.2% hexazinone and 48.6% diuron; Diurex, 90% diuron) showed that additives in the commercial formulations did not significantly increase the toxicity of diuron. Direct toxicity assessments were carried out on water samples from the herbicide‐contaminated Sandy Creek, which discharges to the Great Barrier Reef lagoon, and a clean reference site, Tully Gorge in the Tully River. Toxicity was observed in several Sandy Creek samples. Artificial herbicide mixtures were assessed in synthetic soft water and natural freshwaters, with toxic responses being observed at environmentally relevant concentrations. The present study successfully applied a novel multispecies tropical microalgal toxicity test, indicating that it is an effective tool for the assessment of herbicide toxicity in both natural and synthetic freshwaters. Environ Toxicol Chem 2021;40:473–486. © 2020 SETAC

show abstract

Modelling the effects of pulse exposure of several PSII inhibitors on two algae

Cited by 11 publications

References 43 publications

Development and application of a multispecies toxicity test with tropical freshwater microalgae

Development and application of a multispecies toxicity test with tropical freshwater microalgae

Scientific Opinion on the state of the art of Toxicokinetic/Toxicodynamic (TKTD) effect models for regulatory risk assessment of pesticides for aquatic organisms

Toxicity of Herbicide Mixtures to Tropical Freshwater Microalgae Using a Multispecies Test

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