Wednesday, April 27, 2011
"Simply Stated -All living organisms are connected to each other through a food chain."
What is Bioaccumulation?
Simply Stated -
All living organisms are connected to each other through a food chain.
It takes more organisms in the beginning of a food chain to support a smaller number of organisms at the end of the chain. Where bioaccumulation refers to how pollutants enter a food chain; biomagnification refers to the tendency of pollutants to concentrate as they move from one trophic level to the next, up the “food chain.”
* Bioaccumulation refers to how pollutants enter a food chain
* Biomagnification refers to the tendency of pollutants to concentrate
A Deeper Definition
■Bioaccumulation refers to the accumulation of substances, such as pesticides, or other organic chemicals in an organism.  Bioaccumulation occurs when an organism absorbs a toxic substance at a rate greater than that at which the substance is lost. Thus, the longer the biological half-life of the substance the greater the risk of chronic poisoning, even if environmental levels of the toxin are not very high.
The biological sequestering of a substance at a higher concentration than that at which it occurs in the surrounding environment or medium. Also, the process whereby a substance enters organisms through the respiratory tract, gills, epithelial tissues, dietary, or other sources.