Honors Biology Chapter 38

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Conservation Biology

• Honors Biology Chapter 38

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The Earth is rich in Biodiversity
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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??

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HIPPO

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

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CO2 levels rising
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Greenhouse effect causes Global warming

• Greenhouse gasses trap heat
• Water vapor
• Carbon dioxide
• Methane
• Nitrous oxides

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• Temperature

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Sea levels rise by 3
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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

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People are the problem people can be the
solution
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Non-renewable resources

• Oil, coal, gas
• Minerals and ores
• These can run out!

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Renewable resources

• Continuously available within limits

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Sustainability
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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