OREGON STATE UNIVERSITY

Trask People

Researchers

Michael Adams

Michael J. Adams, a research ecologist with the U.S. Geological Survey's Forest and Rangeland Ecosystem Science Center (FRESC) in Corvallis since 1997, is the principal amphibian investigator for the Hinkle Creek Paired Watershed Study and the Trask Watershed Study. Adams received a Ph. D from the University of Washington in wildlife science in 1997 and B.S. from Colorado State University in wildlife biology in 1992. At FRESC, He is currently addressing issues such as invasive species, disease, land use change, and long-term monitoring design for amphibians in North America.

Alba Argerich

Alba Argerich is an Assistant Professor Senior Research at OSU’s Department of Forest Engineering, Resources, and Management. She received her PhD in Fundamental and Applied Ecology from University of Barcelona (Spain) in 2010. She is interested in forest-stream interactions and in the effects of hydrology and morphology on stream metabolism and nutrient cycling.

Ivan Arismendi

Ivan Arismendi is an Assistant Professor at OSU. He has a B.S. in Fisheries Engineering and a Ph.D. in Forest Sciences from Universidad Austral de Chile. His research interests include climate change and streams, hydrological processes, terrestrial-aquatic links, biological invasions, and inter-continental comparisons.

Bob Bilby

Bob Bilby is a Senior Scientist at Weyerhaeuser Co. He has a B.S. in Zoology from University of Rhode Island, and a Ph.D. in Ecology from Cornell University. Bilby’s research has included investigation of the role of large wood in streams and the impact of forestry on this material, response of stream trophic systems to disturbances, relationships between habitat characteristics and salmon productivity and the contribution that spawning salmon make to the nutrient capital and productivity of streams.

Kevin Bladon

Kevin Bladon, is an Assistant Professor of Forest Ecohydrology and Watershed Science in the OSU Forest Engineering, Resources, and Management Department. His research program conducts field, laboratory, and modeling research on the impacts of natural disturbance (e.g., wildfire) and land use (e.g., forest harvesting) on hydrology, water quality, and aquatic ecosystem health at the hillslope, stream reach, and small catchment scale in forested headwaters.

Sharon Bywater-Reyes

Sharon Bywater-Reyes is a postdoctoral scholar in the Department of Forest Engineering, Resources, and Management at Oregon State University. As a geomorphologist, she is interested in how Earth surface processes impact people and ecosystems. She is currently taking advantage of the large suite of discharge and sediment data collected through the Watershed Research Cooperative at the Trask, Hinkle, and Alsea watersheds to quantify primary and secondary controls on suspended sediment dynamics in forested headwater streams managed for timber harvest in western Oregon. She received a B.S. Geology from Southern Oregon University (2007), a M.S. Geology from University of Wyoming (2009), and a Ph.D. in Geosciences from University of Montana (2015).  

Nick Cook

Nicholas Cook is a postdoctoral scholar in the Department of Forest Engineering, Resources, and Management at Oregon State University. His research interests focus on the intersection of natural resource management activities and related environmental impacts to watershed systems, water quality, and ecology. Nick's role with the WRC is to examine the large suite of stream temperature data across the Alsea, Hinkle, and Trask paired-watershed studies for changes in thermal regimes in a managed forest setting. He received a B.S. Physics from the University of Mississippi (2004), a M.S. Civil & Environmental Engineering from George Mason University (2008), and a Ph.D. in Biological Systems Engineering from Virginia Tech (2015).  

Jason Dunham

Jason B. Dunham is a Supervisory Research Aquatic Ecologist for USGS Forest and Rangeland Ecosystem Science Center. He has a Ph.D. Ecology Evolution and Conservation Biology from University of Nevada-Reno

Collin Eagles-Smith

Collin Eagles-Smith is a Supervisory Research Ecologist for USGS. He has a Ph.D. in Ecology and a B.S. in Environmental Resource Sciences from University of California, Davis.

Joan Hagar

Joan C. Hagar is a Research Wildlife Biologist for USGS Forest & Rangeland Ecosystem Science Center. She has a PhD in Forest Ecology from Oregon State University. Her research interests include forest and wildlife ecology, wildlife-habitat relationships, Oregon white oak habitats, and riparian habitat for terrestrial wildlife.

Jeffery Hatten

Jeff Hatten is an associate professor of forest soils in the Forest Engineering, resources & Management Department at Oregon State University (OSU). He earned a B.Sc. degree in Environmental Science with minors in Biology and Chemistry from Western Washington University and Ph.D. degree in Forest Resources from the University of Washington. Prior to joining OSU in 2012, he was an assistant professor in the Department of Forestry at Mississippi State University (MSU).  He teaches courses in forest soils and forest nutrition.  Recognizing that forest soils are key to forest nutrition and productivity and the ultimate source of sediment, Dr. Hatten’s research focusses on forests soils and the source of sediment in managed settings that include intensively managed forests, prescribed fire, and other less intensively managed settings. 

Sherri Johnson

Sherri L. Johnson is the Supervisory Research Ecologist for the USFS Pacific Northwest Research Station, and the Lead USFS Scientist for the H.J. Andrews Experimental Forest. She received her Ph.D. and M.S. from University of Oklahoma's Department of Zoology and a B.A. in Environmental Biology from the University of Montana.

Judith Li

Judith Li, is a retired associate professor in the OSU Department of Fisheries and Wildlife. She received a Ph.D. in fisheries in 1990 from OSU, M.S. in ecology in 1978 from the University of California at Davis and B.S. in biological sciences in 1966 from the University of California at Berkeley. Her research is most often multidisciplinary, examining stream invertebrate distributions to understand responses to physical and chemical gradients, to fish and avian predation, and as tools in bio-assessment. Following retirement from teaching at OSU she has edited books about science for adults, and written fictional books for children that focus on environmental science.

Brooke Penaluna

Brooke Penaluna is a Research Fish Biologist at USFS Pacific Northwest Research Station. She has a PhD from Oregon State University and a MS from Western Washington University. Her research interests include climate change, contemporary forest harvest and disturbances on fish and both riparian and aquatic habitats, and more generally on the ecological linkages among water, land, and people.

Catalina Segura

Catalina Segura, is an Assistant Professor of watershed processes and sediment transport in the OSU Forest Engineering, Resources, and Management Department.  Her research develops at the intersection among fluvial geomorphology, hydrology, and ecology incorporating field-based studies and data modeling.  Catalina received her BS in Forestry Engineering (1997).  She completed her Ms in Environmental Engineering at the University of Washington (2003) and her PhD in Physical Geography at the University of Colorado (2008).

Research Assistants and Biological Technicians

Linda Ashkenas

Linda Ashkenas is a Senior Faculty Research Assistant for OSU's Dept. of Fisheries and Wildlife. She has a B.A from Cornell University and a M.S. from Boston University.

Doug Bateman

Doug Bateman is a Fisheries Biologist for OSU’s Department of Forest Engineering, Resources, and Management. He received his M.S. in fisheries science from OSU in 1998. He is interested in disturbance ecology and the natural history of aquatic organisms.

Nate Chelgren

Nate Chelgren is a Ecologist for USGS FRESC.

William Gerth

William Gerth is a Senior Faculty Research Assistant for the OSU Department of Fisheries and Wildlife. He has his M.S. in fisheries from OSU and 13 years of experience collecting and identifying aquatic macroinvertebrates from streams and rivers throughout Oregon for ecological studies.

Alex Irving

Alex is a Faculty Research Assistant in OSU's FERM Department. He has a B.S. in Environmental Studies from Southern Oregon University. On the Trask study, Alex works to ensure site installation, data collection, sample collection and maintenance occurs at the thirteen hydrology stations.

Peter James

Pete is a Project Lead Hydrology Technician in the Environmental Forestry Research group at Weyerhaeuser Company. Pete has over 12 years of field experience creating and building technical solutions to aid research and monitoring programs. On the Trask study, Pete initially was involved in the design, installation and maintenance of the first hydrology and climate stations. He also is a team member on the Organic Matter and Stream Temperature studies and continues to maintain 2 climate stations. Pete has a B.S. in Environmental Studies from Southern Oregon University.

David Leer

David W. Leer, a faculty research assistant for OSU's Department of Forest Engineering, Resources, and Management, leads field crews and conducts year-round fish and invertebrate sampling at Hinkle Creek and Alsea. He received his B.S. in fisheries science from OSU in 2001. His research interests include the natural history of fish and other aquatic organisms as well as the influence of anadromous fishes upon headwater ecosystems.

Amy Simmons

Amy Simmons is a Faculty Research Assistant at OSU's FERM Department. She has a B.S. from Central Washington University and a M.S. from Washington State University.

Janel Sobota

Janel Sobota is a Senior Faculty Research Assistant for OSU. She has a B.S. from Western Washington University and a M.S. from Oregon State University.

Forest Manager

Maryanne Reiter

Maryanne Reiter is a hydrologist in the Environmental Forestry Research group at Weyerhaeuser Company. Her current work includes both research projects assessing the effects of forest management on water quality and working with company engineers and foresters on stream and riparian management issues. She received her undergraduate degree in soil science from the University of Minnesota in 1986 and her master's is in Forest Engineering from Oregon State University in 1991.

Past Graduate Student

Stephanie Jenkins

Stephanie received her M.S. from Oregon State University. She studied habitat selection by songbirds on the Trask study.

Mark Raggon

Mark received a M.S. from Oregon State University. He studied fish diet and consumption on the Trask Study.

Ben Ramirez

Ben received his M.S. from Oregon State University. He studied interactions between cutthroat trout and sculpins on the Trask study.