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PART 5_2 Chemical contaminants and ecotoxicology

PART 5_2 Chemical contaminants and ecotoxicology

PART 5_2 Chemical contaminants and ecotoxicology

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Population Changes<br />

• Changes in population may come about as a<br />

result of direct changes in numbers of<br />

individual organism <strong>and</strong> gene frequency<br />

(resistance)<br />

• By indirect means (decrease in<br />

population of predators due to toxic<br />

chemicals could lead to increase in<br />

numbers of its prey).

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