摘要: A review of 79 journals, professional papers, and other periodicals for the period January 1950 through 1978, identified approximately 400 published references pertaining to plant species or plant communities as indicators of gene... 展开 A review of 79 journals, professional papers, and other periodicals for the period January 1950 through 1978, identified approximately 400 published references pertaining to plant species or plant communities as indicators of general or specific environmental conditions in the arid and semi-arid regions of the southwestern United States. A matrix illustrating the vegetation/factor interrelationship(s), and the reference describing the relationship(s) was produced for easy recognition and accession of specific abstracts provided. (Author) 收起