Two Decades of Change in Distribution of Exotic Plants at the Desert Laboratory, Tucson, Arizona

Influence of buffelgrass pasture conversion on the regeneration and reproduction of the columnar cactus, Pachycereus pecten-aboriginum, in northwestern Mexico

“…The process of vegetation clearing and planting of buffelgrass in the region has been described elsewhere (PATROCIPES, 1995). Buffelgrass is a nonnative species introduced as a forage plant to the region in the late 50s from material collected in Africa, which later became an invasive species of several Sonoran desert habitats (Bowers et al, 2006;Cox et al, 1988). Buffelgrass pastures are self-sustainable after land conversion; however, when planted in areas with less than 100 mm of rainfall, areas that experience freezing temperature or under heavy grazing, buffelgrass is not selfsustainable (Castellanos-Villegas et al, 2002;Cox et al 1988).…”

Genotypic diversity among pasture and roadside populations of the invasive buffelgrass (Pennisetum ciliare L. Link) in north-western Mexico

“…However, nothing is known about levels of genetic variation in buffelgrass from pasture populations. One of the unforeseen consequences of the introduction of this species has been the invasion of adjacent, desert habitats (Cox et al, 1988;Burguess et al, 1991;Bowers et al, 2006). In this region, buffelgrass colonizes and spreads into roadside shoulders, city lots, hillsides and unconverted desert habitats (Bú rquez et al, 2002), whose ecological consequences are yet to be documented.…”

Feasibility of Invasive Grass Detection in a Desertscrub Community Using Hyperspectral Field Measurements and Landsat TM Imagery

“…Tumamoc Hill (elev. 847 m) is characterized by vegetation typical of the Arizona Upland and also contains vigorous populations of P. ciliare [23]. Its accessibility and proximity to Tucson, AZ, made it ideally suited for field measurements of Arizona Upland vegetation.…”