Biomagnification is the increasing concentration of a substance like pesticides in organisms at higher levels of the food chain. It occurs most often in higher trophic levels where exposure is through food rather than water. An example is DDT, an insecticide used from the 1940s to 1960s that entered the environment and biomagnified up the food chain, negatively impacting bald eagle populations. To control biomagnification, harmful substances should not be put in water systems, toxic pesticides should be avoided, organic foods eaten, and time spent in contaminated areas limited.

1. Biomagnification
MADE BY : ROHIT JAMAREEYA ROLL NO : 91600104005
: HIREN BARIYA : 91600104007
Chemicals in our Environment

2. Biomagnification
Definition:
Biomagnification, also known as bioamplification,
or biological magnification is the increase in
concentration of a substance, such as the pesticide
DDT, that occurs in a food chain

3. Biomagnification
When it’s happen
 Most often, biomagnification occurs in the higher
trophic levels of the food chain/web , where exposure to
chemicals takes place mostly through food consumption
rather than water uptake. Biomagnification is a specific
case of bioaccumulation and is different from
bioconcentration.

4. Biomagnification
Dicholoro-diphenyl-trichloroethane (DDT)
An insecticide used in the 40’s, 50’s and 60’s
entered the environment in run-off from land
DDT Was banned in 1972 after the Bald Eagle population
had a noticeable crash.

5. Biomagnification
Process of Biomagnification

6. Biomagnification
How to control Biomagnification?
 Do not put harmful substances (e.g., used motor oil) into
the water system or storm drains. ...
 Avoid toxic chemical pesticides.
 Eat certified organic foods when possible. ...
 Avoid fishing or spending time in contaminated areas.

7. Biomagnification

8. THANK YOU