bioaccumulation


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Related to bioaccumulation: Bioaccumulation Factor

bioaccumulation

(bī′ō-ə-kyo͞om′yə-lā′shən)
n.
The accumulation of a substance, such as a toxic chemical, in various tissues of a living organism: the bioaccumulation of mercury in fish.

bi′o·ac·cu′mu·la′tive adj.

bioaccumulation

The accumulation of chemicals or nutrients in a living organism against an inorganic background (e.g., the external environment), which is due to a high partition coefficient and resistance to degradation by the bioaccumulating organism.

bioaccumulation

the process of concentration of chemical contaminents in animal tissues as they move higher up the food chain e.g. pesticides and heavy metals stored in fatty tissues are passed on from one predator to a higher predator, the resulting concentrations being increasingly harmful and most so to the top predators.

bioaccumulation

process producing an increase in the concentration of chemicals (usually toxins) in the tissues of organisms with each increase in the trophic level in the food chain. Examples include chlorinated hydrocarbons which reach their greatest concentrations in predatory birds and pelicans, and ciguatera in which the toxins are concentrated in large predatory fish such as gropers, barracudas and mackerel.
References in periodicals archive ?
This project aims to document the extent of arsenic bioaccumulation in rice in Cambodia and establish a database of the geography of rice irrigation with arsenic-rich groundwater.
Bioaccumulation is the accumulation of chemicals in organisms through respiration, ingestion, or direct contact with contaminated water, sediment, and sediment pore waters.
Bioaccumulation factor (BCF) values of essential and toxic metals in plant parts are presented in Table 1.
The European Chemicals Agency (ECHA), Helsinki, Finland, which is responsible for administering REACH, has still not come up with firm criteria for deciding whether the levels of persistency, bioaccumulation and biodegradation of pigments and other chemicals with similar properties are hazardous to the environment.
Differences in chemical bioaccumulation and biomarker responses among the Mytilus spp.
He covers the cycling of metals in the biosphere; chemical thermodynamics and metal(loid) complexation in natural waters; modeling approaches to estimating speciation and interactions in aqueous systems; metal(loid)s in the atmosphere and their inputs to surface waters; trace metal(loid)s in marine waters; trace metals in freshwaters; and trace metals and organisms: essential and toxic metals, organometallics, microbial processes, and metal bioaccumulation.
What has not been explored is if there is differential bioaccumulation in different organ system.
Al-Khanjari's study, entitled 'Concentrations and Bioaccumulation of Polycyclic Aromatic Hydrocarbons (PAHs) in the Soft Sediments of Mangrove, East Coast of Qatar', won her the Best Student Poster of the Year in Energy and Environment Research.
Momina Zakzok from Qatar University won the award for the Best Student Energy and Environment Research of the Year for Concentrations and bioaccumulation of trace metals in soft sediments of mangroves, east coast of Qatar.
Momina Zakzok from Qatar University received the award for the 'Best Student Energy and Environment Research of the Year' for 'Concentrations and bioaccumulation of trace metals in soft sediments of mangroves, east coast of Qatar'.
For example, mercury concentrations are higher in older, larger fish as a result of bioaccumulation, so studies must be adjusted for body size.