He said agricultural development and encroaching forest had led to the virtual disappearance of native prairie ecosystems, including a half-dozen butterflies.

Big bluestem is a late-successional grass in prairie ecosystems.

When these tactics are used together it helps to maintain a perfectly diverse and balanced prairie ecosystem.

The sharp-tailed grouse is found throughout different prairie ecosystems in North America.

The only remaining species of wild horse is a part of the prairie ecosystem and grazes alongside bison.

It occurs in a variety of prairie ecosystems.

An average of over 16 inches (40 cm) of precipitation falls annually, supporting a prairie ecosystem.

The process is essential to the prairie ecosystem.

At Fermilab, restorationists have brought to life a functioning prairie ecosystem supporting some 125 native plant species.

Each plant species is adapted to survive the conditions prevalent in the mixed-grass prairie ecosystem.