Effects on Ecosystems

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Effects on Ecosystems
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Oil Spills
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The Atmosphere and Ecosystems

• Acid Rain Acid rain, which is caused by airborne
  pollutants that lower the pH of rain, has damaged
  many forests and lakes, especially in the
  Northeast.

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Section 1
The Ozone Layer
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What is Destroying Ozone? Destruction of the
ozone layer is caused by chlorofluorocarbons
(CFCS), and several other manufactured chemicals.
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The Ozone Hole

• Satellite images taken over the South Pole have
  revealed that the ozone concentration is lower
  over Antarctica than elsewhere in the earth's
  atmosphere, and is called the ozone hole.

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Section 1
Global Temperature

• The Greenhouse Effect The greenhouse effect
  occurs when greenhouse gases, such as carbon
  dioxide, trap heat within Earth's atmosphere.

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Is Global Warming Occurring?

• Many scientists think that the increased
  concentrations of CO2 and other greenhouse gases
  in the atmosphere has led to global warming, but
  the matter remains controversial.

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Often it is important to analyze change over
time, a process called longitudinal analysis.
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Agricultural Chemicals and Biological
Magnification

• The release of toxic chemicals, such as
  pesticides, into the environment can have serious
  effects, particularly when their concentration is
  magnified by food chains.

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Section 2
Effects on Ecosystems
Loss of Resources

• Extinction of Species The earth is losing many
  potentially valuable and irreplaceable species,
  with about 10 percent on the brink of extinction.
• Loss of Topsoil The rich topsoil cannot be
  replaced and is being lost at a rate of 10
  centimeters each decade.

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Ground-Water Pollution and Depletion

• Large amounts of ground water are being removed
  from many aquifers far faster than natural
  processes can replenish it.

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Growth of the Human Population

• Worldwide Rates of Growth Rapid growth of the
  human population place serious stress on the
  Earth's ecosystems.

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A day in the life of Carbon

• Write the name of something that you eat that
  photosynthesizes.
• Write the name of something that eats that thing
  (besides you)
• Write the name of something you eat that came
  from either of these things.
• What happens to the thing you eat after you eat
  it? What does it do in your body?