ii. tundra
DESCRIPTION
II. Tundra. A. Characteristics/Climate. 1. Only found in the northern hemisphere 2. Make up 10 % of the Earth 3. Very unstable because of a lack of biodiversity 4. Receive less than 25 cm of rain. 5. Rarely above 10 C (40 F) a. This is the tundra’s limiting factor - PowerPoint PPT PresentationTRANSCRIPT
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II. Tundra
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A. Characteristics/Climate
1. Only found in the northern hemisphere
2. Make up 10 % of the Earth3. Very unstable because of a lack of biodiversity4. Receive less than 25 cm of rain
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5. Rarely above 10 C (40 F)a. This is the tundra’s limiting
factor6. The soil has an active zone of 8cm deep to grow in7. Below that it is always frozen= permafrost8. Slow growth is why it is fragile
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B. Organisms
1. Plantsa. Close to the ground with
shallow rootsb. Trees are 1 meter tall or less
1. Dwarfed by the cold
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2. Animalsa. Mostly migratoryb. Birds and large mammals during the summer1. Feed on mosquitos and plants2. Caribou main food are lichensa. Dieing b/c lichens are dieingc. Permanent residents are foxes bears, wolves wolverines oxen and hares
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