[from the text] The general effect of fire on shrubs should always be considered in relation to the ecological potential of a community. In grasslands, shrubs have a difficult time maintaining a dominant position due to competition from healthy grasses, droughts, and occasional fires. However, when domestic livestock graze these grassland areas, competition from grasses is lessened, fires are less frequent, and shrubs increase. Grazing reduces the competition from grass after burning, and the natural, or detrimental effect of fire on shrubs is lost.