Cheryl HortCheryl-Hortonon

Cheryl was co-advised during her M.S. degree at OSU by Dr. Katie Dugger and Dr. Robert M. Suryan. Her research goals were to better understand top-down impacts on colonial nesting seabirds over a range of spatio-temporal scales.  To address this question she studied the coast-wide distribution and abundance of a Common Murre (Uria aalge) metapopulation during two decades (1988-2006) of Bald Eagle (Haliaeetus leucocephalus) recovery in Oregon.  She studied the effects of predation and disturbance in 2012 at three Common Murre breeding sites located in regions of varying Bald Eagle density, and at a single site over a seven year period from 2007-2013. Cheryl defended her thesis in June 2014, titled: Effects of bald eagle (Haliaeetus leucocephalus) disturbance on the common murre (Uria aalge) meta-population breeding in coastal Oregon.



Scott JenniJenningsngs

Scott’s research interests include understanding how reproductive success varies among individuals in a population, and how long-term data sets can be used to understand how populations respond to changing environments.  His M.S. thesis research was conducted on Ross Island, Antarctica, where he explored parental factors affecting growth of Adélie Penguin chicks, and how variation in growth rates affect survival to independence. Scott defended his thesis titled: Provisioning, Growth and Survival of Adélie Penguin Chicks at Cape Crozier, Ross Island, Antarctica in March 2015.  For more information about research on Adélie Penguins on Ross Island, visit  Scott is permanently employed as Avian Ecologist at the Cypress Grove Research Center, with Audubon Canyon Ranch in CA.  




Kevyn Groot

For her M.S. research, Kevyn studied the demographics of the Columbian black-tailed deer in Oregon, a subspecies of mule deer that has experienced a widespread decline since the 1980′s.   She analyzed a data set collected by Oregon Department of Fish and Wildlife during a 6-year study of radio-collared black-tailed deer in southwest Oregon during 1994-2000, and estimated seasonal and annual survival rates by sex and age classes. This retrospective study provided vital rates for comparison with estimates generated from other parts of the species range, and an ongoing study currently being conducted in southwest Oregon.  Kevyn graduated June 2015 and her thesis was titled:  Historic Survival Rates and Cause-Specific Mortality for Columbian Black-Tailed Deer in Southwest Oregon.  She is now permanently employed by Oregon Department of Fish and Wildlife as the Assistant Project Leader for West Region Wildlife Research, in Roseburg, Oregon.




Lizz Mulligan Schuyler

Lizz’s research interests include the population dynamics, disease ecology, and habitat selection and use of large ungulates.  She studied annual and seasonal survival rates and cause-specific mortality of female mule deer in eastern Oregon using 7 years of GPS satellite transmitter data collected by Oregon Department of Fish and Wildlife from 2005-2012.  Lizz explored the effects of movement behavior and climate at different scales on monthly survival of female deer, and mortality due to a variety of sources for both males and females.  She graduated October 2015 and her thesis was titled: Survival Rates and Cause-Specific Mortality for Mule Deer in South-central Oregon. Lizz is continuing her research interests in Mule Deer by returning to OSU as a PhD candidate in Fall 2016 under the co-advisement of Dr. Dana Sanchez and Dr. Lisa Ellsworth.  




Lee Foster

Lee was co-advised during his M.S. research by Dr. Katie Dugger and Dr. Christian Hagen.  He studied the demographics and habitat use of female Greater Sage-grouse in relation to a recent large-scale wildfire.  Lee used GPS satellite transmitters to track survival, reproductive success, movements and habitat use of female sage-grouse immediately following the Holloway Fire that burned ~187,000 ha of high quality of sage-grouse habitat in southeast Oregon & northern Nevada during August 2012.  He graduated in May 2016 and his thesis was titled: Resource Selection and Demographic Rates of Female Greater Sage-Grouse Following Large-Scale Wildfire.  Lee is now permanently employed by Oregon Department of Fish and Wildlife as the Sage-Grouse Conservation Coordinator in Hines, OR.




Chad Marks Fchadife

Chad is Oregonian by birth and holds bachelor’s degrees in both wildlife and music performance. He is also a federally certified tree-climbing instructor and has a strong focus on canopy science where he studies arboreal mammals, raptors, and lichens. Chad was co-advised during his M.S. degree by Dr. Katie Dugger and Dr. Eric Forsman.  His M.S. research project revolved around red tree voles, and efforts to determine the age structure of wild populations and estimate detection rates and population density of tree voles by forest age class in Oregon coastal forests.  Chad defended his M.S. thesis titled:  Estimation of Population Age Structure, Detection Probability, and Density of Red Tree Voles in Oregon in June 2016. He is currently working for the Forest Service investigating the effect of artificial nest structures on red tree vole occupancy in younger forest stands.