Pollution & biomagnification / Habitat destruction

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5 Terms

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biomagnification

buildup of fat-soluble chemicals at increasing concentrations up trophic levels

  • small in water, large in top predators

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DDT

insecticide (used to kill, repel pests)

  • solubility: low = water, high = fats

  • higher trophic levels

  • interferes with eggshell formation

  • banned in 1970s in US

  • discovered by Paul Muller

  • banned by Rachel Carson

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Habitat destruction

human driven process that prevents support for original species from there

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Deforestation

most affected by agriculture

  • tropical forests only cover 7% of land now

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Agriculture impacts

  • soil erosion

  • flooding

  • decline in soil fertility

  • silting of rivers

  • desertification