Bioaccumulation and biomagnification are two distinct procedures that frequently happen couple with each other. Bioaccumulation is the procedure by which poisons enter the food web by working up in singular living beings, while biomagnification is the procedure by which poisons are passed starting with one trophic level then onto the next (and in this way increment in fixation) inside a food web. Manufactured (man-made) synthetics called Persistent Organic Pollutants, or POPs, are of essential concern when taking a gander at bioaccumulation and biomagnification. These synthetic compounds don't handily separate in the earth and can develop in the greasy tissues of living life forms. A few instances of POPs you may have known about incorporate DDT (a bug spray that was utilized widely post-WWII) and PCBs (fire retardants). Despite the fact that the creation of these synthetic compounds was prohibited during the 1970s and 1980s, they can in any case be found in the seas just as the tissues of numerous marine creatures due to their capacity to (1.) continue in the earth for extensive stretches of time, (2.) move inside water, and (3.) break down into the greasy tissues of living beings. For these reasons, POPs like DDT and PCBs are particularly acceptable at bioaccumulating and biomagnifying. Bioaccumulation happens at the base of a food web, as a rule inside essential makers like phytoplankton. These minute photosynthetic creatures assimilate POPs legitimately from the seawater and gather them in their bodies after some time.