Cattle Replace Bison to Restore Grassland Health

Three centuries ago, 20 million bison thundered over prairies that covered what is now the entire Midwestern U.S. Once a vital part of the grasslands eco-system, today America’s 30,000 remaining wild bison live mostly within enclosures that keep them off private land while cattle herds fill the niche that bison once occupied. The challenge of maintaining the health of the prairie lies in the ability to manage herds, such that they don't graze too much or too...

© La Voix de l'Amérique - vendredi 4 septembre 2015