Human activities

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  • Created by: Sam
  • Created on: 24-01-14 13:32
What is biodiversity?
Measure of the number of species on the planet
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What is the main cause of extinction?
human activity
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What human activity causes a threat to large mammals?
loss of habitat/ over hunting/ competition
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what are species threatened by?
natural selection/ deforestion/ pollution/ drainage of wet lands
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reasons for deforestation
wood used as fuel/ paper and packaging/ infrastucture
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what is agricultural exploitation?
the way in which food production has increased in efficiency and intensity to maximise the yield from the land to meet human needs
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what conflicts can agricultural exploitation lead to?
larger fields required hedgerows to be removed for large machinary
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consequences of deforestation
reduction in biodiversity/ soil erosion/ climate change
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overfishing results in...
higher harvesting rate/ loss of biodiversity/ depletion of younger fish
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what is a superpest?
envolved through drugs and pesticides which have eliminated competition
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Other cards in this set

Card 2

Front

What is the main cause of extinction?

Back

human activity

Card 3

Front

What human activity causes a threat to large mammals?

Back

Preview of the front of card 3

Card 4

Front

what are species threatened by?

Back

Preview of the front of card 4

Card 5

Front

reasons for deforestation

Back

Preview of the front of card 5
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