what is biodiversity? the variety of living things in a place worldwide: 2 - 30 million species...
TRANSCRIPT
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What is biodiversity?
The variety of living things in a place
Worldwide: 2 - 30 million species• 900,000 insect species• 400,000 plant species• 10,000 bird species
20-30 plant species per m2 in North American grasslands
Where is Biodiversity?
More tree species in 50 hectares than in all of North America in the Amazon
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Exploring Biodiversity: Bugs Galore!
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• Kingdom
• Phylum
• Class
• Order
• Family
• Genus
• Species
Animalia
Chordata
Mammalia
Primate
Hominidae
Homo
Homo sapiens
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Is Biodiversity constant?
Worldwide: Biodiversity “Hotspots”
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Is Biodiversity constant?
Worldwide: Biodiversity “Hotspots”
Regionally: Land Use Differences
“Latitudinal Diversity Gradient”
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Is Biodiversity constant?
Biodiversity is declining!
30% of species extinct by 2050
Worldwide: Biodiversity “Hotspots”
Regionally: Land Use Differences
“Latitudinal Diversity Gradient”
Habitat destruction
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70%
30%
Species Living in 2000
Extant
Extinct
HIPPO• habitat destruction• invasive species • pollution• human over population • over-harvesting
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Exploring Biodiversity: Biodiversity Stock Market!
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Why Is Biodiversity Important?
• May help increase ecosystem productivity– The more species you have the more
completely you can use the land’s resources– Certain species may help or allow other
species to grow
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Why Is Biodiversity Important?
• May help ecosystem stability– More resistant to invasion– More resistant to disease– More resilient toward disturbances
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Ecosystem Services
• Food, water, energy • Purify air and water• Potential medicines• Ecotourism• Seed dispersal• Pollination
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Ecosystem Services
• The economic value of all ecosystem services is estimated to be ~$3 trillion per year