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Old 06-18-2009, 09:57 PM   #1
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Default As Fences Cut Off Migration, Hoofed Species Decline

As Fences Cut Off Migration, Hoofed Species Decline
by Christopher Joyce

As Fences Cut Off Migration, Hoofed Species Decline : NPR
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Grant Harris from the U.S. Fish and Wildlife Service and a team of scientists compiled a record of all the great migrations in the historical record. These are "charismatic megafauna," says Harris: wildebeests and oryxes in Africa, caribous in North America, the antelopelike chiru in Asia. They move by the thousands over hundreds of miles of territory, seeking out fresh grass or other forage or water. In some northern areas, they migrate to escape deep snow. Often they mate during migrations. The animals also influence the landscape by eating certain plant species, effectively changing the mix of vegetation in the regions they pass through. And, their feces fertilize the vegetation.

Migrations Decline Across The Globe
The researchers concluded that there have been 24 big migrations around the world.

"Of those 24," says Harris, writing in the journal Endangered Species Research this month, "we've lost six species that do not migrate in large masses, in long distances, anymore."
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Old 06-18-2009, 10:11 PM   #2
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This is a major cause for concern. I have often wondered about the long term effects of barring them from accessing food and water.
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