Chronic toxicity of 2,4,2′,4′‐tetrabromodiphenyl ether on the marine alga <i>Skeletonema costatum</i> and the crustacean <i>Daphnia magna</i>

Källqvist, Torsten; Grung, Merete; Tollefsen, Knut-E.

doi:10.1897/05-424r.1

Cited by 43 publications

(8 citation statements)

References 25 publications

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“…Moreover, no effects were also expected to occur in the short term tests at concentrations up to the solubility limit of Octa-BDEs by the analogy with another highly brominated diphenyl ether (decabromodiphenyl ether) [18]. In contrast, Källqvist et al found that BDE-47 caused obvious growth inhibition in the marine diatom Skeletonema costatum , and the no observed effect concentration (NOEC) was 6.6 mg/L [19]. BDE-47 had also been found to depress the growth of four species of marine microalgae and affect the activities of antioxidant enzymes [20].…”

Section: Introductionmentioning

confidence: 99%

Effects of Decabromodiphenyl Ether (BDE-209) on Inter-Specific Competition between Two Species of Marine Bloom-Forming Microalgae

et al. 2013

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Decabromodiphenyl ether (BDE-209), a new kind of persistent organic pollutants, was selected to investigate its influence on population growth and inter-specific competition between two species of marine bloom-forming microalgae, Heterosigma akashiwo and Karenia mikimotoi. (1)BDE-209 showed acute toxic effects on both microalgae and H. akashiwo was more sensitive from view of 96 h-EC50 and the ultrastructure variation. (2)The microalgal population growth patterns in mono-culture were density-dependent and the growth of both species in the normal co-culture was significantly depressed by competition (P<0.05) with different initial biomass ratios. BDE-209 exposure significantly changed the growth. (3) Lotka-Volterra competition model was used to simulate the interaction between the microalgae. BDE-209 exposure broke the competitive balance to make competition gradually shift in favor of H. akashiwo. Results suggested BDE-209 did have toxic effects on either microalgal growth or the inter-specific competition, which was quite different from previous reports. Further exploration of the mechanism is needed.

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Section: Introductionmentioning

confidence: 99%

Effects of Decabromodiphenyl Ether (BDE-209) on Inter-Specific Competition between Two Species of Marine Bloom-Forming Microalgae

et al. 2013

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“…The culturing of the daphnids were performed according to methods described by Källqvist et al [20].…”

Section: Daphnid Bioaccumulation Testmentioning

confidence: 99%

Bioconcentration of the intense sweetener sucralose in a multitrophic battery of aquatic organisms

Lillicrap

Langford

Tollefsen

2011

Enviro Toxic and Chemistry

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Reports of the intense (artificial) sweetener sucralose (1,6-dichloro-1,6-dideoxy-β-D-fructo-furanosyl 4-chloro-4-deoxy-α-D-galactopyranoside) in various environmental compartments have led to speculations about biological effects in nontarget species living in areas receiving discharges from anthropogenic activities. We have, as the first step in the risk assessment of this compound, conducted bioaccumulation studies in the freshwater alga Pseudokirchneriella subcapitata, the crustacean Daphnia magna, and zebrafish (Danio rerio). The freshwater algae and the daphnid tests were performed using a 48-h static exposure system, whereas the zebrafish test was performed using a 48-h semi static exposure system followed by 48 h flow-through of clean water for the depuration phase. All three studies were conducted with two exposure concentrations (10 and 100 mg/L), and the concentrations of sucralose in water and biota were verified by liquid chromatography/mass spectrometry. The studies showed that uptake of sucralose was assumed to achieve a steady state within the first 48 h, and the bioconcentration factor at the assumed steady state (BCF(SS) ) was calculated to be less than 1 for algae and between 1.6 to 2.2 for the daphnids. The fish BCF(SS), assumed to occur between 24 to 48 hours, were calculated to be less than 1 for both concentrations tested. A first-order one-compartment (uptake phase) and a first-order two-compartment (elimination phase) model characterized the uptake and depuration kinetics in zebrafish (k(1)=0.027-0.038/h and k(2)=0.206-0.222/h, t(95)=13.5 to 14.6 h, t(50)=3.1 to 3.3 h, and BCF(kinetic)=0.4 to 0.9). The current study shows that sucralose does not bioaccumulate in aquatic organisms from different tiers of the food web, and that the BCF's obtained were considerably lower than the criteria set to identify persistent, bioaccumulative, and toxic substances (i.e., BCF ≥ 2,000).

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“…Motility decreased in daphnids at 25, 50 and 100~-LM starting on the third day but no mortality was observed. For the two highest treatments (50 and 100~-LM), the total number of offspring was significantly reduced.Toxicity of BDE47 to D. magna was investigated previously byKallqvist et a/. (2006).…”

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confidence: 99%

Toxicity and bioaccumulation of 2,2', 4,4'-tetrabromodiphenyl ether (BDE47) in a laboratory aquatic food chain

Awad¹

2021

Preprint

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Rising levels of polybrominated diphenyl ethers (PBDEs) have been ovserved in the environment, humans, and animlas. Studies have shown that these compounds can elicit toxic effects in animals (e.g. neurotoxicity and thyroid toxicity). This research investigated the effects of BDE47 on the survival and reproduction of Daphnia magna over two generations. The impacts of water-borne exposure were compared to dietary exposure using the following treatments: dosed water (DW), dosed algae (DA) and dosed water and algae (DWA). In the first generation, significant impacts on reproduction were observed in daphnids in the DA and DWA treatments. In the second generation, no significant impacts on reproduction were observed indicating a recovery from maternal exposure. When second generation daphnids were exposed to BDE47, there was high mortality in the DWA treatment anad reduced reproduction in all dosed treatments. Dietary exposure to BDE47 had a more profound impact on daphnid reproduction than water exposure. In the second generation, dietary exposure affected both survival and reproduction and water exposure reduced reproduction, indicating that maternal exposure was a factor.

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Chronic toxicity of 2,4,2′,4′‐tetrabromodiphenyl ether on the marine alga Skeletonema costatum and the crustacean Daphnia magna

Cited by 43 publications

References 25 publications

Effects of Decabromodiphenyl Ether (BDE-209) on Inter-Specific Competition between Two Species of Marine Bloom-Forming Microalgae

Effects of Decabromodiphenyl Ether (BDE-209) on Inter-Specific Competition between Two Species of Marine Bloom-Forming Microalgae

Bioconcentration of the intense sweetener sucralose in a multitrophic battery of aquatic organisms

Toxicity and bioaccumulation of 2,2', 4,4'-tetrabromodiphenyl ether (BDE47) in a laboratory aquatic food chain

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