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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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Journal ArticleDOI
TL;DR: The results indicate that a long‐term survey is needed to assess the safety of bivalves, and the relationship between MC bioaccumulation and environmental parameters such as water temperature, chlorophyll a, suspended solids, intracellular MC per unit volume of lake water and per‐unit weight of SS and extracellular MC is clarified.
Abstract: Seasonal changes of microcystin (MC) bioaccumulation in three freshwater Unionid bivalves, Anodonta woodiana, Cristaria plicata, and Unio douglasiae, were investigated in the hypereutrophic Lake Suwa. Total MC concentrations (MC-RR and -LR) as determined by reverse-phase high-performance liquid chromatography were at high levels in the hepatopancreas of C. plicata and U. douglasiae, with maxima at 297 and 420 g/g dry weight, respectively. The amounts and seasonal changes in the accumulated MC concentration differed in all species. The total MC concentration of A. woodiana was always less than that of other species (maximum concentration of 12.6 g/g dry weight). The toxin concentration of C. plicata remained very low in summer, when the Microcystis bloom occurred, but increased rapidly in autumn, when the toxic bloom disappeared. For U. douglasiae, simple regression analyses were performed to clarify the relationship between MC bioaccumulation and environmental parameters such as water temperature, chlorophyll a, suspended solids (SS), intracellular MC per unit volume of lake water and per-unit weight of SS and extracellular MC. The toxin concentration of U. douglasiae correlated more closely with qualitative factors, with intracellular toxin per SS (p 0.001, R 2 0.72) than with quantitative factors such as chlorophyll a and intracellular toxin per unit volume of lake water. No correlation could be found between MC in the tissues and extracellular MC. These results indicate that a long-term survey is needed to assess the safety of bivalves. The study should take into consideration both interspecific differences in toxin content and what is the optimal monitoring parameter. © 2002 Wiley Periodicals, Inc. Environ Toxicol 17: 424 - 433, 2002; Published online in Wiley InterScience (www.interscience.

72 citations

Journal ArticleDOI
TL;DR: It is elucidated that As(III) and As(V) had little potential toxicity on marine fish and were rapidly biotransformed to the less toxic arsenobetaine (AsB), respectively.

72 citations

Journal ArticleDOI
TL;DR: Cattle grazing in the surroundings of the factory are exposed to Hg from contaminated soils, plants and surface water, but the consumption of contaminated fish from the lake appears to be the main route of exposure for humans.

72 citations

Journal ArticleDOI
TL;DR: The results show that when controlled for size and seasonal effects, zebra mussels represent a useful biomonitor for metal availability in the river and may offer an interesting alternative to native mussels and fish for such a role.
Abstract: In order to evaluate the use of zebra mussels as biomonitors for metal bioavailability in the St Lawrence River, we tested the hypothesis that the concentrations of 11 metals in zebra mussels vary significantly between sites along the river and that the season of collection and body size affect metal bioaccumulation Mussels were collected at 14 sites during June 1996 and at monthly intervals at one site Specimens were grouped in three size classes and their soft tissue was analyzed for As, Ca, Cd, Cr, Hg, Mn, Ni, Pb, Se, and Zn Significant size effects were found for Ca, Cd, Cr, Cu, Ni and Zn Spatial and seasonal variations in bioconcentration were significant for all metals Spatial patterns in contamination that corresponded to known point sources of pollution or hydrology of the river were identified by principal component analysis Seasonal variations can be attributed to the reproductive cycle of mussels and hydrological variability of the river In comparison with values reported for zebra mussels in other contaminated sites in North America and Europe, levels of metal in the St Lawrence River are low or intermediate Our results show that when controlled for size and seasonal effects, zebra mussels represent a useful biomonitor for metal availability in the river and may offer an interesting alternative to native mussels and fish for such a role Local contamination by some toxic metals is still a cause for concern in the St Lawrence River

72 citations

Journal ArticleDOI
TL;DR: The reported data indicate that Cadmium exposure results in significant cadmium uptake, but the pattern of this uptake varies with the organ, and the high contamination levels reached suggest that such muscle would be unsuitable for human consumption.

72 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023949
20222,090
2021463
2020445
2019416
2018415