Competition between Bromus tectorum L. and Poa pratensis L.: the role of light.

Bromus tectorum L. dominates sites of large-scale disturbance, while Poa pratensis L. dominates the sites of small-scale disturbance in the Festuca/Symphoricarpos habitat type in eastern Washington (USA).

Microsite utilization by Bromus tectorum L. and Poa pratensis L. in a meadow steppe community.

Emergence of Bromus tectorum L. and Poa pratensis L., two dominant alien grasses in eastern Washington, from 24 microsites was monitored in spring and autumn 1979.