Aquatic Ecosystems: Current Research
Understanding and predicting Oregon coastal coho salmon freshwater survival
- Nate Mantua (contact person), UW Climate Impacts Group (CIG)
- Peter Lawson, NOAA Fisheries, Newport OR
- Elizabeth Logerwell, NOAA Fisheries, Alaska Fisheries Science Center, Seattle
- Robert Francis, UW School of Aquatic and Fisheries Sciences and UW Climate Impacts Group
In parallel to our completed study in the ocean environment (Logerwell
et al. 2003), we are currently identifying the physical climate processes
that affect freshwater productivity of Oregon coastal coho salmon. When
complete, this work will be combined with our marine survival findings
to develop a full life cycle/climate model for Oregon coastal coho.
Previous research suggests that flow/smolt-production relationships vary depending on each basin's hydrology and habitat characteristics. For instance, a limiting factor for smolt production in steep streams appears to be high spawning and incubation flows. For low-gradient streams, high spawning flows often benefit smolt production by increasing the amount of spawning habitat accessible to returning adults.
- What are the population level consequences of large-scale interannual to interdecadal climate variations for both marine and freshwater salmon productivity?
- How sensitive are climate related limiting factors in freshwater productivity to habitat quality? To what degree can habitat restoration mitigate the vulnerability of salmon to climate variations?
- Is it possible to construct life-cycle models for various salmon populations that can be used to assess climate change impacts on salmon populations?
For more publications on CIG's research on climate and PNW aquatic ecosystems, please see CIG Publications.
Logerwell, E. A., N. J. Mantua, P. Lawson, R. C. Francis, and V. Agostini. 2003. Tracking environmental processes in the coastal zone for understanding and predicting Oregon coho (Oncorhynchus kisutch) marine survival. Fisheries Oceanography 12(3):1-15.