To confirm that MBPs biomagnify
, my next step is to analyze lots offish, squid, crustaceans, and plankton from the Northwestern Atlantic--creatures representing other links within this food chain.
Because PCBs biomagnify
in estuarine and marine food chains, concentrations of the organochlorine compounds increase by a factor of 10 to 100 times or more from lower to upper trophic levels (i.
POPs can dissolve in fat and thus bioaccumulate and biomagnify
(increasing in concentration up the food chain).
Such substances are toxic--they can be poisonous, infectious, or corrosive--are often persistent, and as a result have the ability to bioaccumulate (build up in fatty tissues in individual organisms) and concentrate further or biomagnify
up food chains.
Nonessential elements are not usually regulated metabolically and may bioaccumulate and/or biomagnify
PCBs bioaccumulate and biomagnify
in organisms in concentration factors up to one million to one (Smith et al.
42) Research has shown that harmful and persistent substances can both bioaccumulate (or increase in concentration as exposures persist) and biomagnify
(or increase in concentration at higher trophic levels) within organisms as they assume some of the chemical burden of their prey or environment.
The study revealed that Zn, Ni and Pb had high MAR values indicating that they conceivably have the greatest tendency to biomagnify
in man when these oysters are consumed compared to the other investigated elements.
Elevated metal concentrations in bottom sediments can lead to the contamination of benthic organisms, which can biomagnify
up the food chain and pose health risks to humans who consume contaminated seafood or wildlife products (Kennish, 1997, 1998a).
POPs bioaccumulate and biomagnify
in the lipid-rich Arctic food webs, some to dangerous levels.
Accumulation of BMAA in the proteins of nerve cells, which need to last a lifetime, would provide a mechanism for how the toxin might biomagnify
PCBs and the main DDT metabolite dichlorodiphenyldichloroethylene (p,p '-DDE) bioaccumulate in fat tissues, biomagnify
through the food chain, are highly persistent in living organisms, and comprise the hulk of organochlorine residues in human tissues (Longnecker et al.