Honors Biology Chapter 38 - PowerPoint PPT Presentation

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Honors Biology Chapter 38

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Title: Honors Biology Chapter 38


1
Conservation Biology
  • Honors Biology Chapter 38

2
The Earth is rich in Biodiversity
3
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5
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6
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7
People are the problem
  • The human population is growing over 6 billion
  • Over 3 million in the US alone
  • How many people can Earth sustain??

8
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9
HIPPO
  • Habitat destruction
  • Invasive (non-native) species
  • Pollution
  • Population
  • Over-harvesting of resources

10
CO2 levels rising
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12
Greenhouse effect causes Global warming
  • Greenhouse gasses trap heat
  • Water vapor
  • Carbon dioxide
  • Methane
  • Nitrous oxides

13
  • Temperature

14
Sea levels rise by 3
15
In the next 100 years
  • 1 foot of water as the ocean itself warms
  • 1 foot of water as the ice sheets of Greenland
    and antarctica thaw
  • 1 foot as the mountain glaciers melt
  • 100 million people live within 3 feet of sea level

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Ice is key to our environment
  • Ice reflects solar radiation, reduces heat
  • Melted ice decreases salinity of ocean
  • Salinity affects ocean currents ocean nutrient
    cycling
  • Ocean currents affect coastal temperatures and
    climates
  • Extreme ice - pbs.org

18
People are the problem people can be the
solution
19
Non-renewable resources
  • Oil, coal, gas
  • Minerals and ores
  • These can run out!

20
Renewable resources
  • Continuously available within limits

21
Sustainability
22
The 4 Laws of Ecology
  • Everything is connected to everything else
  • Everything must go somewhere
  • Nature knows best
  • There is no such thing as a free lunch
  • Barry Commoner, The Closing Circle
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