Biomagnification and the Trouble with Toxins

What does DDT stand for?

DDT is an abbreviation for dichlorodiphenyltrichloroethane.

In what decade did the use of DDT as a pesticide spark?

The 1940s.

What environmental impact led to the cancellation order of DDT by the EPA?

DDT was found to have negative environmental effects.

What significant effect did DDT have on bald eagles?

It led to severe thinning of bald eagle egg shells, affecting their reproductive abilities.

What is biomagnification?

Biomagnification is the process by which toxins become more concentrated in the living tissues of organisms as you move up the food chain.

Why do toxins concentrate more in higher trophic levels?

Higher trophic level organisms must consume more biomass from the lower levels, which may contain toxins, resulting in increased concentrations in their tissues.

What happens to the energy that is not retained as organisms move up the trophic levels?

It is lost as heat or undigested matter, leading to the need for higher consumption of biomass.

What are some consequences of chemical toxins getting into the environment?

They can contaminate the air, soil, and water, affecting various organisms and ecosystems.

What alternative solution to traditional pesticides is mentioned in the lecture?

Manipulating viruses to specifically target pest insects.

What additional problems do animals face beyond the effects of pesticides?

Habitat destruction, habitat loss, and poaching.