David Olszyk is a research ecologist at the U.S. Environmental Protection Agency in Corvallis, Oregon. His research has included a variety of studies of the ecophysiological effects of environmental stresses on plants and terrestrial ecosystems. He is currently acting branch chief for the Ecological Effects Branch at EPA’s Western Ecology Division, home of the Willamette Ecosystem Services Project.

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The Willamette River is the 13th largest river in the United States, and its 29,727 square kilometer basin supports a mosaic of agricultural, timber, and recreational resources as well as several growing urban centers and their water supplies. The Willamette River Basin (WRB) has a Mediterranean climate with dry summers and wet winters. The …

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