Aquatic ecologists at ACCS specialize in using computational ecology to investigate relationships between physical habitat, population biology, community ecology, and ecosystem dynamics. Our work integrates in-situ empirical data with spatially explicit climate and landscape information in statistical model frameworks. In Alaska, salmon populations and productivity are highly variable in space and time – a true reflection of the dynamic and diverse habitats which they occupy. Hydrologic and geomorphic diversity provide a wide range of food and habitat which support life-history diversity. Much of our current work focuses on how temperature and hydrology create suitable in-stream habitat and how this affects salmon distributions, timing of life-histories, and population diversity.