Recent Vegetation Changes Along the Colorado River Between Glen Canyon Dam and Lake Mead, Arizona (Geological Survey Professional Paper 1132)
Place Published: Washington DC
Publisher: United States Government Printing Office
Date Published: 1980
Book Id: 38694
125pp. Quarto [28 cm] Bound in plain tan wraps with a velo binding. Original wraps bound in. Very good. The wraps are lightly soiled, and the title and previous owner's name has been written in pen on the front wrap. Several pages have brief underlining. With the three maps in the rear pocket.
From the Abstract- "Vegetation changes in the canyon of the Colorado River between Glen Canyon Dam and Lake Mead were studied by comparing photographs taken prior to the completion of the Glen Canyon Dam in 1963 with those taken afterwards at the same sites... In general, the older pictures show an absence of riparian plants along the banks of the river. The new photographs of each pair were taken in 1972 through 1976. The most obvious vegetation change revealed by the photograph comparison is the increased density of many species. Exotic species, such as saltcedar and camelthorn, and native riparian plants, such as sandbar willow, arrowweed, desert broom, and cattail, now form a new riparian community along much of the channel of the Colorado River between Glen Canyon Dam and the Grand Wash Cliffs."