Question : Create an aquaticfood chain in a waterbody into which effluents flow from a pesticide factory. Diagrammatically represent biomagnification in thisfoodchain.

Question : Create an aquaticfood chain in a waterbody into which efflu

1.	Question : Create an aquaticfood chain in a waterbody into which effluents flow from a pesticide factory. Diagrammatically represent biomagnification in thisfoodchain.
Answer» Solution :A few toxic substanceoften presentin INDUSTRIAL waste waters, can undergo BIOLOGICAL magnification in theaquatic foodchain. Increase in concentration of the TOXICANT at successivetrophic levels refers to biomagnifications. Thisis dueto a toxic substanceaccumulatedby organism cannot be metabolisedor excreted and thus,passes onto the nexthighertrophiclevel . THis phenomenon is well knowfor mercury and DDT. The figureshownsbiomagnification of DDTin an aquaticfood CHAIN . Inthis manner , the concetration of DDT is in creased at successivetrophic levels . If is starts at 0.003 ppb (part per billion ) inwater ,it can ultimately reach25 ppm (part per MILLION) in fish eating birds, through biomagnification . High concentration of DDTdisturbs calcium metablolism in birds, whichcauses thickeningof egg shell and their premature breakingeventually causingdeclinein brids populations.