ecosystems: rainforests of the world a presentation by: carol cleveland nsf nmgk-12 fellow 2000-2001
TRANSCRIPT
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Ecosystems: Rainforests of the World
A presentation by:
Carol Cleveland
NSF NMGK-12 Fellow 2000-2001
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2 Kinds of Rain Forests
Tropical Coastal Temperate
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What is a Rain Forest?
3 Main Layers of the Forest
(Emergent)
Canopy
Understory
Forest Floor
Over 100 inches of rain in a year(we get about 60 inches)
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Where do you find rainforests?
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Where do you find rainforests?
Tropical rainforests are mostly around the equator.
50% are in South America.
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Tropical Rainforests• Near equator• Warm Temperature
(70-80oF)• Rainy - 2 inches/hour
sometimes• Up to 400 inches rain in a
year• Many species of plants
and animals• In danger from people
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Tropical Rainforest Animals
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Tropical Rainforest Animals
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Tropical Rainforest Plants
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Coastal Temperate Rainforests
Scattered around the worldMostly on Pacific West coast of North America
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Coastal Temperate Rainforests
• Alaska to Oregon• 35 to 80oF - not
extremes• Rain - 140-167 inches
per year• Trees can grow to 300
feet high and 23 feet in diameter
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Coastal Temperate Rainforest Animals
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Coastal Temperate Rainforest Plants
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Why shouldn’t we cut down rainforests?
• Rainforests - very high diversity of animal and plant life (lots of different kinds)
• Very difficult to replace - not many nutrients in the soil so once the plants are gone it is hard to grow any plants in that area
• Add oxygen to the atmosphere (40%)
but also use much oxygen by decay