Guide to Arbor Day Disturbances such as a forest fire or timber harvesting may result in a shift to another forest type. When left undisturbed, ecological succession will eventually result in a climax forest community Guide 70.58 Kb. 1
Westward Expansion, Manifest Destiny and the Donner Party Texas, California, Colorado and Oregon. The California Gold Rush, the construction of railroads and a growing pioneer spirit all contributed to the expansion of the "wild west." 11.24 Kb. 1