Depuration processes after exposure of burrowing mayfly nymphs (Hexagenia rigida) to methylmercury and cadmium from water column or sediment: effects of temperature and pH

Odin, M.; Ribeyre, Francis; Boudou, A.

doi:10.1016/s0166-445x(96)00818-1

Cited by 14 publications

(5 citation statements)

References 13 publications

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“…Unfortunately, the temperature influence on elimination rates appeared to be understudied for aquatic organisms. However, the few available studies show an increase with increasing temperature, for cadmium, pyrethroid insecticides, and persistent organic pollutants, in accordance with the present study of IMI and FPF.…”

Section: Discussionmentioning

confidence: 99%

Explicit Consideration of Temperature Improves Predictions of Toxicokinetic–Toxicodynamic Models for Flupyradifurone and Imidacloprid in Gammarus pulex

Mangold-Döring

Huang

Nes

et al. 2022

Environ. Sci. Technol.

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In the face of global climate change, where temperature fluctuations and the frequency of extreme weather events are increasing, it is needed to evaluate the impact of temperature on the ecological risk assessment of chemicals. Current state-of-the-art mechanistic effect models, such as toxicokinetic–toxicodynamic (TK–TD) models, often do not explicitly consider temperature as a modulating factor. This study implemented the effect of temperature in a widely used modeling framework, the General Unified Threshold model for Survival (GUTS). We tested the model using data from toxicokinetic and toxicity experiments with Gammarus pulex exposed to the insecticides imidacloprid and flupyradifurone. The experiments revealed increased TK rates with increasing temperature and increased toxicity under chronic exposures. Using the widely used Arrhenius equation, we could include the temperature influence into the modeling. By further testing of different model approaches, differences in the temperature scaling of TK and TD model parameters could be identified, urging further investigations of the underlying mechanisms. Finally, our results show that predictions of TK–TD models improve if we include the toxicity modulating effect of temperature explicitly.

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Section: Discussionmentioning

confidence: 99%

Explicit Consideration of Temperature Improves Predictions of Toxicokinetic–Toxicodynamic Models for Flupyradifurone and Imidacloprid in Gammarus pulex

Mangold-Döring

Huang

Nes

et al. 2022

Environ. Sci. Technol.

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“…Cain et al 1995) or estimates of uptake rate (e.g. Odin et al 1997). However, as these studies show, the problem becomes smaller as the bioaccumulation of the compound becomes more important and (for bioaccumulating materials) as the experimental uptake time increases: at a constant gut content, more bioaccumulating materials have higher tissue concentrations over time.…”

Section: Discussionmentioning

confidence: 99%

Stable isotopes as trophic tracers: combining field sampling and manipulative labelling of food resources for macrobenthos

Herman¹,

Middelburg²,

Widdows³

et al. 2000

Mar. Ecol. Prog. Ser.

260

175

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We combined 3 different approaches to determine the relative importance of microphytobenthos production as food for intertidal macrobenthic animals: (1) the natural abundance of stable-isotope ratios of carbon and nitrogen, (2) an in situ deliberate tracer addition of 13 C-bicarbonate, which was transferred through the benthic food chain after its incorporation by benthic algae, and (3) a dual labelling experiment in a flume, where pelagic and benthic algae were labelled with 15 N and 13 C, respectively. The results of the 3 approaches confirmed the high importance of microphytobenthos as a food source for (surface) deposit feeders. Despite the clearly demonstrated resuspension of benthic algae at high current velocities, suspension feeders appeared to depend almost exclusively on pelagic algae (and possibly detrital carbon) as a food source. Based on the results of the experiments, we determined an approximate degree of dependence on microphytobenthos for different species of intertidal macrobenthos. The macrobenthic biomass at 5 study locations, when weighted by these coefficients, correlated very well with measured productivity of the microphytobenthos.

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“…The whole-body content of metals in benthic insects can be influenced by ingested materials, such as sediment particles, in the gut (Hare et al 1989;Cain et al 1995). We estimated the potential contribution of gut contents to the whole-body burdens of SHg and MeHg accumulated by mayfly nymphs in our tests by assuming that the gut of a Hexagenia contained 1.2 mg dry weight of ingested sediment, a value derived for individual Hexagenia rigida by Odin et al (1997). In mayflies exposed to sediments from contaminated reaches, we estimated that from 13 to 52% of the SHg in the whole mayfly was contributed by gut contents, with the remainder of the whole-body burden contributed by bioaccumulation and adsorption.…”

Section: Discussionmentioning

confidence: 99%

Bioavailability of sediment-associated mercury to <i>Hexagenia</i> mayflies in a contaminated floodplain river

Naimo¹,

Wiener²,

Cope³

et al. 2000

Journal canadien des sciences halieutiques et aquatiques

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We examined the bioavailability of mercury in sediments from the contaminated Sudbury River (Massachusetts, U.S.A.). Mayfly nymphs (Hexagenia) were exposed in four 21-day bioaccumulation tests to contaminated and reference sediments (treatments) from reservoirs, flowing reaches, palustrine wetlands, and a riverine lake. Mean total mercury (SHg) ranged from 880 to 22 059 ng•g dry weight-1 in contaminated sediments and from 90 to 272 ng•g-1 in reference sediments. Mean final concentrations of methyl mercury (MeHg) in test water were greatest (8-47 ng Hg•L-1) in treatments with contaminated wetland sediments, which had mean SHg ranging from 1200 to 2562 ng•g-1. In mayflies, final mean concentrations of MeHg were highest in treatments with contaminated wetland sediments (122-183 ng Hg•g-1), intermediate in treatments with contaminated sediments from reservoirs, flowing reaches, and a riverine lake (75-127 ng Hg•g-1), and lowest in treatments with reference sediments (32-41 ng Hg•g-1). We conclude that the potential entry of MeHg into the benthic food chain was greater in contaminated palustrine wetlands than in the contaminated reservoirs, which had the most contaminated sediments. Résumé : Nous avons étudié la biodisponibilité du mercure dans les sédiments d'un cours d'eau pollué des États-Unis (rivière Sudbury, au Massachusetts). Des nymphes d'éphémères (Hexagenia) ont été exposées, dans le cadre de quatre épreuves de bioaccumulation de 21 jours, à des sédiments de référence et à des sédiments contaminés provenant de réservoirs, de tronçons d'eau vive, de milieux humides palustres et d'un lac fluvial. La quantité moyenne de mercure total (SHg) était comprise entre 880 et 22 059 ng•g poids sec-1 dans les sédiments contaminés et entre 90 et 272 ng•g-1 dans les sédiments de référence. La concentration moyenne finale de méthyl mercure (MeHg) dans l'eau étudiée était au plus haut (8-47 ng Hg•L-1) dans les expériences sur des sédiments contaminés provenant de milieux humides, dont la SHg moyenne était comprise entre 1200 et 2562 ng•g-1. Chez les éphémères, la concentration moyenne finale de MeHg était au plus haut dans les expériences sur des sédiments contaminés de milieux humides (122-183 ng Hg•g-1), intermédiaire dans les expériences sur des sédiments contaminés provenant de réservoirs, de tronçons d'eau vive et d'un lac fluvial (75-127 ng Hg•g-1) et au plus bas dans les expériences en présence de sédiments de référence (32-41 ng Hg•g-1). Nous concluons que la possibilité d'entrée du MeHg dans la chaîne alimentaire benthique était plus grande dans les milieux humides palustres contaminés que dans les réservoirs contaminés, qui pourtant renfermaient les sédiments les plus contaminés.

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Depuration processes after exposure of burrowing mayfly nymphs (Hexagenia rigida) to methylmercury and cadmium from water column or sediment: effects of temperature and pH

Cited by 14 publications

References 13 publications

Explicit Consideration of Temperature Improves Predictions of Toxicokinetic–Toxicodynamic Models for Flupyradifurone and Imidacloprid in Gammarus pulex

Explicit Consideration of Temperature Improves Predictions of Toxicokinetic–Toxicodynamic Models for Flupyradifurone and Imidacloprid in Gammarus pulex

Stable isotopes as trophic tracers: combining field sampling and manipulative labelling of food resources for macrobenthos

Bioavailability of sediment-associated mercury to <i>Hexagenia</i> mayflies in a contaminated floodplain river

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