The fragmentation, degradation and loss of grassland ecosystems by human activities are key threats to the species populations.

When the great ice sheets advanced and retreated, the ranges of countless creatures, not to mention entire forest and grassland ecosystems, moved with them.

Savanna is a grassland ecosystem characterized by the trees being sufficiently small or widely spaced so that the canopy does not close.

I study large mammals in African grassland ecosystems.

The authors of this study set out to examine the impact of a single year of extreme temperature on a grassland ecosystem.

Flat land, dry grasses and herds of antelopes have always attracted visitors to this park which has a unique grassland ecosystem.

Before its extinction on the mainland, the boodie served a very important function in the Australian grassland ecosystem.

In addition to loss due to urbanization, the entire grassland ecosystem where they once thrived no longer exists in the same form.

In the West, the Indians' fires helped create, renew and maintain grassland ecosystems.

The range supports a unique grassland ecosystem.