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Part XVII : Human Influences on Populations Index

Extinction of Species
Introduced Species
How Humans Can Help
Biodiversity
Natural Parks in France

Topic Chapters Index

 

Hunter © Deborah James

When hunters miss their target, the lead shot which comes out of the gun is left behind in nature. Lead is a toxic metal. It is estimated that 3000 tons of lead shot are deposited in French wetlands each year. Swans, ducks and geese pick up the lead shot and store them in their gizzards.

What influence could this have on these birds?

 

Dam © Paul Billiet

How would building a dam on a river change the habitat of the region?

 

HUMAN INFLUENCES ON POPULATIONS

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Some Human Activities which Modify Habitats

Human influences on the environment can be considered here as being influences on the habitats of living organisms. Any time humans alter the hydrosphere, lithosphere, atmosphere or biosphere, habitats are modified and survival can become more challenging (or even impossible) for the organisms which live there.

 

Copper mine, Bisby, Arizona © Shirley Burchill

An open caste mine is a big hole in the ground dug to extract metals and minerals.
This one is in Arizona, USA, is to mine copper.

What organisms live in the deserts of Arizona?
How would building such a mine affect them?

 

Panda, Vincennes Zoo © Shirley Burchill

The main component of a panda's diet is bamboo.
Bamboo forests have been cut down by humans for centuries.

What effect has this had on the panda population?

 

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