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UncertaintyWhat factors within and outside of the Columbia River Basin influence trends in recruitment, mortality, and abundance of Columbia River Basin fish and wildlife populations?
ThemePopulation structure and diversity
SubthemeStatus and trends - limiting factors
Criticality Level Priority
Rationale Understanding how environmental and ecological factors affect vital rates and abundance of fish and wildlife populations in the Basin is critical for guiding management actions to improve population status. The uncertainty varies widely among species and is typically greatest for factors affecting migratory fish and wildlife during life stages spent outside the Basin. However, the ocean synthesis has provided considerable information on how salmon growth and abundance are influenced by food availability and other factors (Jacobson et al. 2012). The list of potential factors is long, and six more specific sub-uncertainties were each given high criticality ratings.

last updated: Jan 27, 2016