University of Arizona

Environment

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  1. Paul Bigelow Sears Collection

    Paul B. Sears, perhaps more than any other person, epitomized American plant ecology. In a professional career spanning almost 7 decades, he made major contributions to vegetation mapping, paleoecology and Pleistocene history, vegetation studies, conserva ...

    castanoe - 2013-04-25 16:19

  2. Robert R. Humphrey Photograph Collection

      Robert Register Humphrey was born in 1904 in Palo Alto, Calif. He earned his bachelor's, master's and doctorate degrees in botany and geology from the University of Minnesota, graduating in 1933. He worked as a range ecologist with the U.S. Fo ...

    castanoe - 2014-03-10 16:47