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Bioaccumulation is the gradual accumulation of substances, such as pesticides or other chemicals, in an organism. [1] Bioaccumulation occurs when an organism absorbs a substance faster than it can be lost or eliminated by catabolism and excretion .
Bioaccumulation of a toxicant can lead to biomagnification through a trophic web which has resulted in massive concern in areas with especially low trophic diversity. [ clarification needed ] Biomagnification results in higher trophic organisms accumulating more PBTs than those of lower trophic levels through consumption of the PBT contaminated ...
Bioaccumulation occurs within a trophic level, and is the increase in the concentration of a substance in certain tissues of organisms' bodies due to absorption from food and the environment. Bioconcentration is defined as occurring when uptake from the water is greater than excretion.
In aquatic toxicology, bioconcentration is the accumulation of a water-borne chemical substance in an organism exposed to the water. [1] [2]There are several ways in which to measure and assess bioaccumulation and bioconcentration.
Three ounces of skipjack tuna, for example, contain iron, calcium, magnesium, phosphorus, ... Bioaccumulation occurs as larger fish eat smaller fish that contain mercury, "causing the mercury ...
Evaluation of the effects of POPs on health is very challenging in the laboratory setting. For example, for organisms exposed to a mixture of POPs, the effects are assumed to be additive. [35] Mixtures of POPs can in principle produce synergistic effects. With synergistic effects, the toxicity of each compound is enhanced (or depressed) by the ...
Bioaccumulation refers to uptake of radionuclides into the cell, where they are retained by complexations with negatively charged intracellular components, precipitation or granules formations. Unlike biosorption, this is an active process: it depends on an energy-dependent transport system.
Bioaccumulation is an active metabolic process driven by energy from a living organism and requires respiration. [ 9 ] [ 12 ] Both bioaccumulation and biosorption occur naturally in all living organisms [ 13 ] however, in a controlled experiment conducted on living and dead strains of bacillus sphaericus it was found that the biosorption of ...