Exposure of Chironomus riparius larvae to uranium: Effects on survival, development time, growth, and mouthpart deformities

Dias, Victor; Vasseur, Christophe; Bonzom, Jean‐Marc

doi:10.1016/j.chemosphere.2007.09.029

Cited by 53 publications

(39 citation statements)

References 26 publications

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“…There were four replicates per treatment (16 experimental units). We chose exposure concentrations equal to 0, 32, 64, and 128 lg g -1 dry weight based on the result of a previous single generation experiment (Dias et al 2008).…”

Section: Multi-generation Testsmentioning

confidence: 99%

“…Uranium chemical toxicity is considered to be more important than radiological toxicity (Sheppard et al 2005). Data concerning uranium effects on freshwater benthic macroinvertebrates are scarce (Dias et al 2008). Our study species, C. riparius, is convenient for assessing the toxicity of contaminated sediments in multi-generation tests, mainly because it has a short life-cycle under laboratory conditions (Vogt et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Individual-based model of Chironomus riparius population dynamics over several generations to explore adaptation following exposure to uranium-spiked sediments

et al. 2012

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Natural populations are chronically exposed to various pollutants over many generations. It is thus crucial to understand and quantify adaptive dynamics of stressed populations in order to increase the relevance of ecotoxicological risk assessment. However, long-term consequences to population exposure are not much studied yet. The present study investigated evolutionary responses of Chironomus riparius populations exposed to uranium (heavy metal pollutant) and to assess the underlying mechanisms. To fulfil our objective, we produced data with organisms exposed to four relevant concentrations of uranium through eight successive generations. We built an individual-based (IBM) model of C. riparius population dynamics to analyse these data and to test several assumptions about the mechanisms involved in the phenotypic changes. The IBM was based on a dynamic energy budget (DEB) model for C. riparius by Pery et al. (2002). DEB models account mathematically for the acquisition and use of energy to describe and predict growth, maintenance, development and reproduction of living organisms. The IBM accounted for the influence of the test conditions on the observations over eight generations and highlighted some trait evolution such as time to emergence and adult size in control conditions. The model was then used to analyse the exposed population data. Our results showed that exposure to uranium led to a phenotypic selection via a differential survival characterised by longer time to emergence and smaller larval maximal size. As a general conclusion, IBMs based on DEB-based modelling developed to analyse multi-generation experiments are very promising for understanding and quantifying long term selection and tolerance mechanisms in a population under toxic stress.

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Section: Multi-generation Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Individual-based model of Chironomus riparius population dynamics over several generations to explore adaptation following exposure to uranium-spiked sediments

et al. 2012

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“…As C. sancticaroli individuals used in our morphological analysis did not come into contact with chemical pollutants, we cannot draw a connection between the division of the central tooth and chemical exposure. However, since our experimental population was maintained under laboratory conditions for about two years, we cannot rule out the possibility of inbreeding, which has been reported also as a possible cause of high levels of deformities in cultured chironomids (BIRD et al 1995, BIRD 1997, VERMEULEN et al 2000a, DIAS et al 2008.…”

Section: Discussionmentioning

confidence: 99%

Setting the reference for the use of Chironomus sancticaroli (Diptera: Chironomidae) as bioindicator: Ontogenetic pattern of larval head structures

Rebechi¹,

Navarro-Silva²

2012

Zoologia (Curitiba)

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“…Samples were then digested using a combination of HNO 3 and H 2 O 2 , filtered (0.45 lm; cellulose acetate; Minisart Ò ) and diluted to volume with acidified water (2% HNO 3 ) (Dias et al 2008). Uranium concentration was measured by ICP-MS. Gaffiere River water sampled at S0 was also analysed: uranium concentration and major cations (Ca, Mg, Na, K) were analysed by ICP-AES and anions were analysed by ionic chromatography.…”

Section: Chemical Analysesmentioning

confidence: 99%

“…This bioassay aimed to determine the LC 50 on larvae growth at 7 days. Moreover, in order to determine if effluent toxicity was due to presence of uranium, bioassays were also performed using uranium nitrate, a molecule which has been largely studied in the laboratory on algae (Fortin et al 2004), daphnids (Zeman et al 2008), midge (Dias et al 2008) and zebrafish (Barillet et al 2007; Barillet et al 2005;Bourrachot et al 2008). In order to compare the contamination levels, toxicity results are reported to uranium concentrations in the text (mg U/l) for effluent and uranium nitrate.…”

Section: Introductionmentioning

confidence: 99%

Transfer modelling and toxicity evaluation of the effluent from an installation of cleansing and uranium recovery using a battery of bioassays

et al. 2010

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On July 7, 2008, a leak of effluent from an Installation of Cleansing and Uranium Recovery (Tricastin, France) led to the spillage of uranium in a stream. The acute toxicity of the effluent was evaluated, and compared to the toxicity of uranium nitrate in bioassays using several organisms: Chlamydomonas reinhardtii, Daphnia magna, Chironomus riparius and Danio rerio. A sediment bioassay was also performed on C. riparius using water and sediment sampled along the river. Results showed that effluent EC(50) 72 h was 0.65 mg U/l for algae and LC(50) 48 h was 1.67 mg U/l for daphnia, while values obtained for uranium nitrate were higher. The LC(50) 96 h of effluent to C. riparius was 22.7 mg U/l, similar to value for uranium nitrate; the sediment collected was not toxic to C. riparius larvae. The LOEC of effluent and uranium nitrate on HT(50) of D. rerio were similar (0.03 mg U/l), but larvae were more sensitive to uranium nitrate than to effluent. Our results suggest that other substances contained in the effluent could potentially be toxic to wildlife in association with uranium. In parallel, the modelling of the transfers based on uranium measurements in the surface water was used to fill data gaps and assess the impact along the river. These results provided an estimate of exposure conditions that occurred along the river. This approach allowed us to see that the risk to ecosystem during this incident was certainly low and concerned a short period of time, but it could have existed at least for some species.

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Exposure of Chironomus riparius larvae to uranium: Effects on survival, development time, growth, and mouthpart deformities

Cited by 53 publications

References 26 publications

Individual-based model of Chironomus riparius population dynamics over several generations to explore adaptation following exposure to uranium-spiked sediments

Individual-based model of Chironomus riparius population dynamics over several generations to explore adaptation following exposure to uranium-spiked sediments

Setting the reference for the use of Chironomus sancticaroli (Diptera: Chironomidae) as bioindicator: Ontogenetic pattern of larval head structures

Transfer modelling and toxicity evaluation of the effluent from an installation of cleansing and uranium recovery using a battery of bioassays

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