Cheatgrass (Bromus tectorum L) dominance in the Great Basin Desert. History, persistence, and influences to human activities

biodiversidad biodiversity bromus tectorum ecologia ecologie ecology economia economics economie erosion escarda establecimiento de plantas eua fires grasslands grazing herbage incendie incendios introduction de plantes malezas mauvaise herbe methode methods modele modelos models mycorrhizae parcours pastoreo plant establishment plant introduction population density praderas rangelands seed dispersal species diversity tierras de pastos usa weed control weeds