• Projects
  • Historical Range of Beaver in the State of California, with an emphasis on areas within the range of coho salmon and steelhead trout


Northwest Fisheries Science Center (NWFSC) Fish Ecology FE - Watershed


Historical Range of Beaver
Historical Range of Beaver in the State of California, with an emphasis on areas within the range of coho salmon and steelhead trout
This project examines historical, archaeological, and geological evidence to re-evaluate the existing management paradigm that beaver are non-native to most of California. The purpose of the study is to identify where beaver historically existed or could have existed, with particular emphasis on their likely range within watersheds that are utilized by coho salmon or steelhead trout. Identification of the habitat overlap between beaver and these two salmonids will enable restoration efforts utilizing beaver to be targeted where they will maximize the benefits for these species in terms of rearing and overwintering habitat.

Research Themes

Recovery and rebuilding of marine and coastal species
The Pacific Northwest is home to several iconic endangered species, including Pacific salmon and killer whales, and several rockfish species. Mandates such as the Endangered Species Act, MagnusonStevens Act, and the Marine Mammal Protection Act, grant NOAA Fisheries the authority to manage the recovery of depleted species and stocks. The NWFSC contributes to species recovery through research, monitoring and analysis, providing NOAA managers and regional stakeholders the tools and information they need to craft effective regulations and develop sustainable plans for recovery.

Research Foci

Develop methods to use physiological, biological and behavioral information to predict population-level processes
Understanding the biological processes occurring within organisms is a powerful way of understanding how environmental changes affect those organisms. Genetics, developmental, physiological and behavioral studies all provide important information for effective species recovery and rebuilding. Integrating this information into models is vital to predict how populations will respond to natural or human perturbations, and to assess the constraints to stock rebuilding efforts. For example, data on thermal tolerance and physiological responses to temperature can be used to explore changes caused by shifts in climate on reproductive behavior and productivity, viability, movement, habitat selection, and population dynamics. Similarly, data on contaminants that impact physiological processes (immune system, growth, development, reproduction, and general health) are critical in determining how these compounds affect population dynamics. Data on biological responses of organisms to ocean acidification are useful for understanding how acidification may affect individual development and survival. The NWFSC collects such information for several species that are of concern, targets of fisheries or otherwise important for overall ecosystem function. NWFSC scientists will continue to expand current efforts and develop methods to incorporate physiological, biological and behavioral data into population models in order to predict population-level processes from these individual level data.




None associated




Michael Pollock
Principal Investigator