Probing the Depths of Crater Lake During much of its 100 years of National Park status, this national treasure saw little scientific study, despite significant environmental threats

Douglas W. Larson is an adjunct professor of biology at Portland State University and a '''Science and Technology" columnist for National Forum, the journal of the honor society of Phi Kappa Phi. He received a Ph.D. in limnology from Oregon State University and a B.S. in biology from Jamestown College. He retired from the U.S. Army Corps of Engineers in 1991 and has pub lished about 50 papers in refer eed journals. Between 1967 and 1986, Larson spent 14 summers at Crater Lake con