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 indicate that the negative impact of oil spills on mesozooplankton may be increased by the use of chemical dispersant and UV radiation, but attenuated by crude oil-microbial food webs interactions, and that both mesozoopsooplANKton and protozoans may play an important role in fate of PAHs in marine environments.
Abstract: We conducted ship-, shore- and laboratory-based crude oil exposure experiments to investigate (1) the effects of crude oil (Louisiana light sweet oil) on survival and bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in mesozooplankton communities, (2) the lethal effects of dispersant (Corexit 9500A) and dispersant-treated oil on mesozooplankton, (3) the influence of UVB radiation/sunlight exposure on the toxicity of dispersed crude oil to mesozooplankton, and (4) the role of marine protozoans on the sublethal effects of crude oil and in the bioaccumulation of PAHs in the copepod Acartia tonsa. Mortality of mesozooplankton increased with increasing oil concentration following a sigmoid model with a median lethal concentration of 32.4 µl L(-1) in 16 h. At the ratio of dispersant to oil commonly used in the treatment of oil spills (i.e. 1∶20), dispersant (0.25 µl L(-1)) and dispersant-treated oil were 2.3 and 3.4 times more toxic, respectively, than crude oil alone (5 µl L(-1)) to mesozooplankton. UVB radiation increased the lethal effects of dispersed crude oil in mesozooplankton communities by 35%. We observed selective bioaccumulation of five PAHs, fluoranthene, phenanthrene, pyrene, chrysene and benzo[b]fluoranthene in both mesozooplankton communities and in the copepod A. tonsa. The presence of the protozoan Oxyrrhis marina reduced sublethal effects of oil on A. tonsa and was related to lower accumulations of PAHs in tissues and fecal pellets, suggesting that protozoa may be important in mitigating the harmful effects of crude oil exposure in copepods and the transfer of PAHs to higher trophic levels. Overall, our results indicate that the negative impact of oil spills on mesozooplankton may be increased by the use of chemical dispersant and UV radiation, but attenuated by crude oil-microbial food webs interactions, and that both mesozooplankton and protozoans may play an important role in fate of PAHs in marine environments.
169 citations
TL;DR: Exposure of Asellus aquaticus to environmental samples for different exposure periods demonstrated that PGE bioaccumulation is time dependent and shows a higher accumulation for the materials with a higher PGE content.
168 citations
TL;DR: Due to their special bioaccumulation capacity of Cd and Ni, Rapana venosa and Ruditapes philippinarum had the potential of being used as biomonitors to control the aquatic contaminations of heavy metals.
168 citations
TL;DR: The differences between bioaccumulation and biosorption of copper from model solutions were studied and copper significantly damages the surface of living cells, which results in partial loss of cell-binding abilities and release of accumulated copper back into solution.
167 citations
TL;DR: In this article, the authors used radiotracer methodologies to examine the bioaccumulation and efflux rates of six metals (Ag, Am, Cd, inorganic Co, organic Co [as cobalamine], Pb, and Zn) in the mussel Mytilus galloprovincialis, in which the dissolved phase and ingested phytoplankton food were compared quantitatively as sources.
Abstract: Mussels are used as bioindicator organisms to assess bioavailable contaminant concentrations in coastal waters. This study used radiotracer methodologies to examine the bioaccumulation and efflux rates of six metals (Ag, Am, Cd, inorganic Co, organic Co [as cobalamine], Pb, and Zn) in the mussel Mytilus galloprovincialis, in which the dissolved phase and ingested phytoplankton food were compared quantitatively as sources. Mussels maintained in the laboratory in running seawater and caged in the field for up to 4 months generally displayed similar metal absorption efficiencies (AEs) and efflux rates from their soft parts. AEs from food were typically lower than radioisotope retention efficiencies from the dissolved phase and ranged from 4% for Am to about 60% for Pb; values were comparable to those reported for the common blue mussel, Mytilus edulis. Efflux rate constants from mussel soft parts (1−5% daily) were comparable to M. edulis values from short-term depurations; biological half-lives of all metals...
166 citations