Keystone species - holding the ecosystem together

Keystone species - holding the ecosystem together

Some species have a big impact on the ecosystem they live in - from altering the physical structure of their environment to dictating the populations and diversity of other species; these "keystone" species have a disproportionate effect on an ecosystem relative to their abundance. Read more about keystone species here.

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Controversial Castor, or, the Re-Introduction of Beavers

Controversial Castor, or, the Re-Introduction of Beavers

The beaver is a great example of a controversial species re-introduction. The two species of rodent, Castor canadensis and Castor fiber, were aggressively hunted for their fur and glands, leading to many local extinctions, but not complete extinction. It has made a great comeback in some places like New Hampshire, and is just now starting to show up in England, bringing about mixed feelings in both cases. 

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