Staff Directory

Frank Ligon
Principal/Senior Aquatic Ecologist/Geomorphologist
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Frank specializes in investigations of the role of fluvial processes and morphology in the ecology of stream fish, invertebrates, and plant communities. As lead aquatic scientist for the San Joaquin River Restoration Plan, he directed the development of the San Joaquin Salmon Model, used to assess the effects of different management scenarios on a restored population of Chinook salmon in the San Joaquin River between Friant Dam and the Merced River confluence. He has served as the lead for many of Stillwater’s projects that have focused on watershed analysis, limiting factor assessment, and river and watershed restoration. In addition to his work on the San Joaquin, Frank has conducted research on fluvial geomorphology and stream ecology on the Tuolumne River, Sacramento River, Noyo River, Clavey River, San Pablo Creek, and many other northern California streams, and has managed the fluvial geomorphology component of hydroelectric relicensing projects in California, Oregon, and Georgia.