Movement of these pollutants involves two main processes:
- Bioaccumulation
refers to how pollutants enter a food chain. there is an increase in concentration of a pollutant from the environment to the first organism in a food chain.
- Biomagnification
refers to the tendency of pollutants to concentrate as they move from one trophic level to the next. there is an increase in concentration of a pollutant from one link in a food chain to another.
In order for biomagnification to occur, the pollutant must be: long-lived, mobile, soluble in fats, biologically active.
If a pollutant is not active biologically, it may biomagnify, but we really don’t worry about it much, since it probably won’t cause any problems Examples : DDT.
WBPCS Notes brings Prelims and Mains programs for WBPCS Prelims and WBPCS Mains Exam preparation. Various Programs initiated by WBPCS Notes are as follows:-- WBPCS Mains Tests and Notes Program
- WBPCS Prelims Exam 2020- Test Series and Notes Program
- WBPCS Prelims and Mains Tests Series and Notes Program
- WBPCS Detailed Complete Prelims Notes