The environmental factors that need to be monitored when DDT goes up an ecosystem's food chain include air and water quality, soil fertility, and concentrations of other harmful contaminants.
How does DDT progress across the food web?
- When an animal eats food that contains DDT residue, the DDT builds up in the animal's tissue through a process known as bioaccumulation.
- The biomagnification mechanism causes the concentration of DDT in an animal's body to increase the higher up the food chain the animal is (for example, tertiary consumers like seals).
- By bioaccumulating in organisms and lowering population sizes that can support higher trophic levels, DDT has an impact on the food chain.
- Fish eating insects poisoned with DDT is a crude illustration of the food chain.
- DDT tends to accumulate in animals because of its chemical makeup.
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