Feedstock Team

GreenWood Resources, Inc. (GWR), is based in Portland, OR and leads the Feedstock Team, which is composed of researchers from GWR and universities around the Northwest.

Brian S

Stanton, Brian

(971) 533-7052
Dr. Stanton is the Chief Science Officer at GWR.  He has more than 25 years of experience in poplar genetics and is an internationally recognized expert.  His research has produced some of the finest breeding collections of Populus deltoides, Populus trichocarpa, and a variety of Asian Tacamahaca poplar.  Brian has overseen hybrid varietal development for poplar commercial tree farms in the U.S. as well as varietal testing in Chile, China, and Europe. Brian is past chair of the Poplar and Willow Working Party for the International Union of Forest Research Organizations and the past chair for the Society of American Foresters Genetics and Tree Improvement Working Group.  Brian received a B.S. in biology from West Chester State College, an M.S. in forestry from the University of Maine, and a Ph.D. in forest resources from Pennsylvania State University.

Kori Ault

Ault, Kori

Kori Ault coordinates research activities for numerous projects related to tree biotechnology and genomics, with particular focus on field data collection and site operations. Kori has been working with the Strauss Lab at Oregon State University as the Forest Genetics and Biotechnology Program Manager since 2011.  Her current projects include the regulation of flowering in poplar and sweetgum trees, and examining heterosis in hybrid poplars.  Kori received her B.S. from Cornell College in 2007 and M.S. from Central Washington University in 2010.


Busby, Posy

Dr. Busby is a Postdoctoral Fellow with a joint appointment at the University of Idaho (Newcombe Lab) and the University of Washington (Tewksbury Lab). She received a Ph.D. in Biology from Stanford University, and a M.F.S. and A.B. from Harvard University. Busby’s research aims to determine the causes and consequences of plant disease in natural and agricultural systems.



Cooke, Andrew

Andrew is a Research Consultant with the University of Washington, School of Environmental and Forest Sciences.  He received his Master of Science in 2008 from the UW College of Forest Resources.  Andrew is a GIS analyst and programmer, and has extensive experience working with large datasets in many different formats and sources.  He has recently worked on developing both the Washington State Parcel Database and the Washington State Forestland and Biomass Databases, as well as supporting web-based data distribution and mapping. He has also worked on image correction and classification, statistical analysis of LIDAR metrics, and road network routing and distance calculations.


Doty, Sharon

Dr. Doty is an associate professor in the School of Environmental and Forest Sciences (SEFS) in the College of the Environment at the University of Washington.  She earned a B.S. degree in Genetics from UC Davis and a Ph.D. in Microbiology at the University of Washington. She did postdoctoral research in plant biochemistry, focusing on developing improved methods for phytoremediation of organic pollutants. Sharon joined the faculty of the UW College of Forest Resources in 2003.  Her primary interests lie in plant microbiology including endophytic nitrogen fixation, remediation of pollutants, and bioenergy.

Jesus Espinoza is an AHB team member at GreenWood Resources

Espinoza, Jesus


Jesus Espinoza is the Director of Silviculture Research for GreenWood Resources, Inc. Dr. Espinoza leads the program of applied research in intensive plantation management for a variety of markets and regions. He has over 20 years’ experience in siliviculture research and operations management. Dr. Espinoza holds a B.S. in Forestry Engineering from De Los Andes University in Venezuela, an M.S. in Forestry from North Carolina State University and a PhD in Forestry from North Carolina State University.


Guerra, Fernando

Dr. Guerra is conducting post-doctoral research in Professor David Neale’s lab at the University of California, Davis.  Fernando’s research analyzes the genetic mechanisms underlying traits of interest for biofuel production in Populus species.  He studies the genetic association between SNP-markers and wood composition (chemical and metabolome), water use efficiency, and growth.  Fernando is also a professor at the Institute of Plant Biology and Biotechnology at the Universidad de Talca, in Chile.


Himes, Austin

Austin Himes joined GreenWood Resources in early 2012 and has contributed by streamlining data collection and developing new experimental designs for hybrid poplar varietal testing. Austin has been working in the field of Forestry since 2003. He contributes to diverse projects including wildland fire operations, controlling mountain pine beetle outbreaks, forest and understory inventory, wildlife habitat surveys, and forest nutrition.   Austin earned a M.S. in Forest and Environmental Science from the University of Washington where he served as the vice president of the local chapter of Xi Sigma Pi, the national forestry honors society.


Kallestad, Jeff

Jeff Kallestad is a Research Intern in the department of Entomology at Washington State University at the Puyallup Research and Extension Center. Jeff has worked closely with GreenWood Resources to develop NIR spectroscopic calibrations for measuring lignin, cellulose, and hemicellulose composition in poplar wood. For the AHB project he is using this technology to measure plant defensive compounds in poplar foliage and bark. Jeff is a graduate of the University of Washington and received his master’s degree at New Mexico State University.

Zareen Khan

Khan, Zareen

Dr. Zareen Khan is a research scientist working on a wide range of topics including phytoremediation of environmental pollutants, bioenergy, and nitrogen fixation. Since 2006, she has been working in Dr. Sharon Doty’s lab at the University of Washington. Zareen earned her Master’s of Science in Technology degree in Environmental Chemistry and a Ph.D in Environmental Science Technology from Jawaharlal Nehru Technological University, in India. She also conducted post-doctoral research in France focusing on bioremediation of carcinogenic polyaromatic hydrocarbons.


Klocko, Amy

Dr. Klocko is a postdoctoral research associate in the lab of Steven Strauss.    Her previous research experiences include analysis of polarized cell growth in the model plant Arabidopsis thaliana, and surveying wildlife and aspen trees for the US Forest Service.  Her current research interests include the regulation of flowering and floral morphology in poplar and eucalyptus trees.  She is an author on five published peer-reviewed papers and one book chapter.  Amy earned a B. S. degree in Biology from Linfield College and a Ph. D. in Plant Biology from Washington University in St. Louis.

Haiwei Lu

Lu, Haiwei

Haiwei Lu is a graduate student working with Dr. Steven Strauss at Oregon State University.  Her current research focuses on the feasibility of genetic containment of transgenic trees using zinc-finger nucleases.  She earned a B.S. degree in Forestry from Beijing Forestry University in 2011.

Cathleen Ma

Ma, Cathleen

Cathleen Ma is a Senior Faculty Research Assistant and biotechnology lab manager in the lab of Steven Strauss at Oregon State University. Her current research is on improving the efficiency with which poplar and eucalyptus can be transformed and regenerated.  She is also studying and evaluating genetically engineered reproductive sterility poplar and eucalyptus trees under greenhouse and  field conditions. Cathleen has published 40 scientific papers and is an author on two book chapters. She received a B.S. degree in Horticulture from Northwestern Agriculture University in China.


Rogers, Luke

Luke Rogers is a research scientist and forest engineer at the University of Washington. Since 2001 Luke has been devoted to increasing the understanding of Washington state forests through the assembly of a statewide land parcel database, researching forestland conversion trends, identifying conservation opportunities, and developing mitigation strategies and incentives. For the AHB project, Luke is utilizing GIS technology to identify the best areas to grow poplar for biofuels in the Pacific Northwest. Luke earned a master’s of Science in Forest Engineering in 2005 from the University of Washington’s College of Forest Resources.

Rich Shuren works for GreenWood Resources

Shuren, Richard

Richard is Director of Tree Improvement Operations at GWR.  He began his career with the Crown Zellerbach Company working on conifer forest regeneration projects. In 1983, Richard participated in establishing the first hybrid poplar research plantings near Boardman, OR and later worked in poplar tree improvement.  In 2000, he started directing GWR’s Westport, OR Tree Improvement Station, where he oversees a program of hybrid poplar breeding and testing that distributes improved plant material to GWR’s global operations.  Richard graduated from Humboldt State University, in Arcata, California in 1976 with a B. S. degree in Forestry.

Rick Stonex - crop

Stonex, Rick

Rick Stonex is the Westside Tree Farm Manager for Greenwood Resources, Inc. Since 2006 he has managed the Lower Columbia Tree Farm and other GreenWood Resources operational activities in Western Oregon and Washington. Rick has 33 years of experience in both conventional and short rotation forestry in the Pacific Northwest. He received a B.S. in Forest Engineering from Oregon State University in 1981.

Steve Strauss

Strauss, Steve

Dr. Steven H. Strauss is a Distinguished Professor of Forest Biotechnology in the Department of Forest Ecosystems and Society at Oregon State University, and has a joint appointment in the Molecular and Cellular Biology Program.  Dr. Strauss has earned degrees in biological sciences from Cornell (B.S.), Yale (MFS), and the University of California at Berkeley (Ph.D), published more than 200 scientific papers, and obtained more than $18 million of grant support.


Zerpa, Jose

Dr. Zerpa is a silvicultural researcher at GWR.  His research centers on the management of site resources to improve stand productivity and value, with emphasis on tree nutrition.  His experience includes operational management of eucalyptus, gmelina, and Caribbean pine plantations in the tropics, and silvicultural research on loblolly pine systems in the Southeast US.  He is currently responsible for GWR’s silvicultural research at the Boardman and Lower Columbia Tree Farms, and for the research trials installed at in the AHB poplar demonstration plantings.  Jose obtained his M. S. and Ph. D. in Forestry at North Carolina State University.