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BIOACCUMULATION. By DHRUVESH TRIPATHI-46 NEHA TRIPATHI-47 YASH TUPAT-48 YASH VAIDYA-49 ANUBHAV VERMA-50 Department of CYBERSECURITY SHAH AND ANCHOR KUTCHHI ENGINEERING COLLEGE,CHEMBUR(W).
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BIOACCUMULATION.
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Humans have been introducing synthetic (man-made) chemicals into the environment..
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DDT was first used in WWII. to protect against diseases.
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DDT_spray_1958.
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DDT is found to have estrogenic effects:. Causes reproductive disorders.
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DDT is used today in such African nations as Zimbabwe and Ethiopia to control mosquitoes and the tsetse fly..
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Used widely in products like paints, plastics, etc as softening agents from the 1930’s – 1970’s.
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Heavy metals are metallic elements that are toxic to organisms..
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Cadmium is also found in low levels naturally.. Cadmium is used in the manufacture of plastics and nickel-cadmium batteries..
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Mercury also is found naturally.. Mercury has entered ecosystems through the burning of fossil fuels, waste incineration, mining, and the manufacture of items like batteries..
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Both DDT and PCBs are called “persistent organic pollutants” (POPs).
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Bioaccumulation is the “build-up of chemicals in living organisms”..
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How it affects organisms:. Birth defects. Bioaccumulation - EFFECTS.
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Many theories attempt to explain these changes, including drought, increased UV rays, pollution, habitat loss, parasites, and diseases..
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Keystone species = species that can greatly affect population numbers & health of ecosystem..
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oto credit: Jimmy.
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Effect of DDT I-ke in Borneo In the early 1950's the people in Borneo. suffered from Malaria the World Health Organization had a solution. kill the mosquitoes with DDT. This is what happned. Overpopulation of caterpillars Byproduct I Elim inated the natural predator for the thatch eating caterpillar DDT Orginal prpose: The WHO used DDT kill the mosqitoes that caused Killed prasitic wasp DDT accumulated in Malaria Byproduct 2 eec kos Biomagnification of DDT poisoning in cats caused an outbreak of sylvatic plague. Caterpillars ate the roofs off the villager's houses As the cats died, the rat pp.llation flourished and and so did an outbreak of plague Eating the geckos caused more DDT to accumulate in the cats that eventually that killed the wild cats.
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Shark Pike Halibut Mercury Fooo Trout Tuna (can) Mercury level (EPA advice for consumption) Eat only a few times per month Krill-• Salmon Pollack Oyster Unlimited Eat a few times per week.
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orca.
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A Bright Idea!. Recently, scientists were able to change a gene in these chemical-eating bacteria allowing them to fluoresce (glow) when they are in contact with oil or other chemical pollutants!.
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THANK YOU …… ..