Topic
Bioaccumulation
About: Bioaccumulation is a research topic. Over the lifetime, 7112 publications have been published within this topic receiving 208953 citations. The topic is also known as: bioakumulace.
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TL;DR: The results support recent findings of limited acute toxicity of ingested microplastics at this trophic level, and suggest sublethal chronic end points should be the focus of further ecotoxicological investigation.
Abstract: The discarding of plastic products has led to the ubiquitous occurrence of microplastic particles in the marine environment. The uptake and depuration kinetics of ingested microplastics for many marine species still remain unknown despite its importance for understanding bioaccumulation potential to higher trophic level consumers. In this study, Antarctic krill (Euphausia superba) were exposed to polyethylene microplastics to quantify acute toxicity and ingestion kinetics, providing insight into the bioaccumulation potential of microplastics at the first-order consumer level. In the 10 day acute toxicity assay, no mortality or dose-dependent weight loss occurred in exposed krill, at any of the exposure concentrations (0, 10, 20, 40, or 80% plastic diet). Krill exposed to a 20% plastic diet for 24 h displayed fast uptake (22 ng mg–1 h–1) and depuration (0.22 h–1) rates, but plastic uptake did not reach steady state. Efficient elimination also resulted in no bioaccumulation over an extended 25 day assay, wi...
118 citations
TL;DR: In this article, a new approach suggests that phenomena such as bioconcentration, biomagnification, and bioaccumulation result from two fundamental processes, i.e., biogenesis and biomagnetism.
Abstract: A new approach suggests that phenomena, such as bioconcentration, biomagnification, and bioaccumulation, result from two fundamental processes.
118 citations
TL;DR: Amphipods, Diporeia sp., were exposed to a reference sediment dosed with two radio-labeled polycyclic aromatic hydrocarbons (PAHs) and sediments with a mixture of PAHs at four concentrations: 21.4, 41.0, 119.6, and 327.0 nmol g-I dry sediment, as the molar sum of the PAH congeners.
Abstract: Amphipods, Diporeia sp., were exposed to a reference sediment dosed with two radio- labeled polycyclic aromatic hydrocarbons (PAHs) and sediments dosed with a mixture of PAHs at four concentrations: 21.4, 41.0, 119.6, and 327.0 nmol g-I dry sediment, as the molar sum of the PAH congeners. Diporeia sp. were sampled for mortality and toxicokinetics for up to 26 d. Signif- icant sediment avoidance was observed at the highest dose out to 6 d of exposure. The toxicity for the mixture was 38 * 3% after 19 d of exposure at the highest dose, 327 nmol g-I dry sediment as the molar sum of the PAHs. The measured organism concentration required to produce the mor- tality at day 19 was 2.9 pmol g-I as the sum of the bioaccumulated PAHs. The uptake clearance (g dry sediment g-' organism h-I) from sediments for the radiotracers increased with dose to an apparent plateau. Uptake clearance is the conditional constant relating the contaminant flux into the organism to the contaminant concentration in the referenced environmental compartment, in this case the sediment. This enhanced bioavailability with dose occurred even in the absence of overt effects and in the absence of changes in the measured partition coefficients for phenanthrene (273 + 98) and pyrene (540 + 212), between the freely dissolved radiotracers in interstitial water and the sediment particles. These changes in bioavailability with changes in PAH concentration suggest that predictions of bioaccumulation of PAH congeners from sediments under different field con- centration conditions will not be possible with standard partitioning relationships.
118 citations
TL;DR: Benefits in terms of biomass production and PAHs bioaccumulation reduction were greatest where SSBC was used as a soil amendment, and at high application rates (10%) SSBC reduced bio Accumulation of PAhs by between 56% and 67%, while SS reduced bioaccummulation ofPAHs by less than 44%.
117 citations
TL;DR: Results indicated that, in general, the presence of Zn in the same medium decreased Cd cytotoxicity, and the use of these eukaryotic microorganisms as potential whole cells or molecular biosensors seems to be a reasonable useful alternative for assessing metallic pollution.
117 citations