ELR applies the latest techniques for evaluating fish behavior, growth, survival, abundance, and production, habitat quality and quantity, and geomorphic assessments.
Fish Monitoring: ELR has extensive experience estimating population and local abundances, behavior, growth, survival and production of fish. We use mark-recapture techniques including using PIT tags, instream and mobile PIT tag antennas. We also have used hydroacoustics, electroshocking, netting, snorkeling, and underwater videography to evaluate these aspects of fish ecology.
Habitat and geomorphic assessments: ELR has developed stream habitat monitoring protocols that use tradition cross sections, total station, real-time kinematic and map grade GPS, and ground based LiDAR to estimate stream topography and develop stream reach DEMs. We also have developed and implemented protocols to estimate substrate composition, large wood, macroinvertebrate abundance and diversity, fish cover, riparian vegetation, and water quality. In fact, ELR was instrumental in developing the Columbia Habitat Monitoring Program (CHaMP), that will be implemented at over 600 sites per year in the Columbia River Basin.
ELR uses aerial photography from blimp, drone, and airplane platforms to provide reach and watershed scale spatial evaluations of stream and watershed form. We have also acquired red LiDAR and are involved in developing green LiDAR to describe stream and landscape topography.