The ground is covered by non-native grasses, creating vast lawns which are intersected by a basic network of sealed paths.

Some non-native grasses were removed from the island and replaced, and hunters reduced an overgrown deer population.

Threats to this rare species include the invasion of non-native grasses, such as purple veldtgrass (Ehrharta calycina).

These non-native grasses, along with the ugly and ubiquitous artichoke thistle, quickly took over the hills.

Golf courses and athletic fields near the slough consist mainly of non-native grasses.

After strip mining, the land had been replanted with non-native grasses to protect the soil.

By livestock grazing, the non-native grasses are controlled and the native plants can redevelop.

This makes more efficient use of the land than domestic cattle who will graze only selectively on non-native grass.

Certain portions of the preserve are grazed by small herds of domestic cattle during spring which helps to reduce non-native grasses.

This is a California native grass which is used for revegetating grassland that has been cleared or claimed by non-native grasses.