"This is the first study to separate the effects of flow regulation and diking on salmon habitat loss in the Columbia River, Oregon's largest river," said Tobias Kukulka, M.S., the lead author of the study who is now in doctoral studies at the University of Rhode Island. "Taken individually, diking and flow-cycle alteration would have reduced spring-freshet shallow water habitat by 52 percent and 29 percent respectively."
The two-part study, funded by the United States Army Corps of Engineers Portland District and NOAA Fisheries, was conducted under the direction of David Jay, Ph.D., associate professor of environmental and biomolecular systems in the OGI School of Science & Engineering. The studies were posted online Sept. 22, 2003, on the American Geophysical Union's (AGU) Web site (http://www.agu.org/pubs/crossref/2003/2003JC001829.shtml and http://www.agu.org/pubs/crossref/2003/2002JC001382.shtml) and will be published soon in the AGU's JGR-Oceans.
Columbia River hydrology has changed drastically in response to human activities and climate at the same time that salmon populations have greatly decreased. To better understand the impacts of hydrolo
Contact: Sydney Clevenger
Oregon Health & Science University