Barb Lachenbruch

Graduate Students

Steve Voelker e-mail:  steve.voelker@oregonstate.edu Ph.D. Student, Wood Science and Engineering I am currently a student in the departments of Wood Science and Engineering as well as Forest Science at OSU.  Previous to my current research I received a B.S. in forest management from the University of Wisconsin-Stevens Point and a M.S. in forest ecology from the University of Missouri.  In the Ozarks of Missouri, I used dendrochronology to assess how various temporal scales of investigation can be used to answer distinct questions related to oak growth and stand dynamics.  I am currently interested in questions regarding how plant anatomy, and hydraulic architecture influence the growth patterns of both closely and distantly related woody species.

Former Students Sonya Dunham, M.S. in Wood Science & Engineering and Forest Science.  2005.  Douglas-fir hydraulic architecture and relationships among xylem properties at multiple scales via a Bayesian analysis. Heidi Renninger, M.S. in Wood Science & Engineering and Forest Science.  2005.  Effects of release from suppresion of hydraulic architecture, photosynthetic capacity, and functional wood characteristics in Douglas-fir and Western hemlock. Lotties Fallas-Cedeno, M.S. in Wood Science & Engineering and Forest Science. 2005. Water movement in relation to xylem conductivity in four hardwood species. Adam Taylor, Ph.D. in Wood Science & Engineering. 2004. Environmental effects on heartwood extractive content and their consequences for natural durability in Douglas-fir and western redcedar. Jose Antonio Silva Guzman, Ph.D. in Wood Science & Engineering. 2004. Development of an accelerated method for assessing decay of wood plastic composites (WPCs). Michele Pruyn, Ph.D. in Wood Science & Engineering and Forest Science. 2002. Patterns of stem respiration within tree, with age, and between species in Pacific Northwest trees. Jean-Christophe Domec, Ph.D. in Wood Science & Engineering and Forest Science. 2002. Structure and hydraulic functions of xylem in two tree species with contrasting amounts of sapwood. Amy Grotta, M.S. in Wood Science & Engineering and Forest Science. 2002. Competitive interactions in young, coastal Douglas-fir/red alder mixtures:  Implications for wood quality. James Robbins, M.S. in Forest Products and Forest Science. 2000. Influence of spacing and crown recession on wood quality of intensively-managed young-growth Douglas-fir. David Baker, M.S. in Forest Products and Forest Science. 2000. Wood density patterns of young Costa Rican trees in planted and natural forests Jeff DeBell, Ph.D. in Forest Products and Forest Science, 1998. Wood quality studies in second-growth western redcedar (Thuja plicata Donn.) Rachel Spicer, M.S. in Forest Products and Forest Science. 1997. Hydraulic properties of compression wood in branches and reoriented shoots of Douglas-fir (Pseudotsuga menziesii). Hua Lei, Ph.D. in Forest Products. 1995. The effects of growth rate and cambial age on wood properties of red alder (Alnus rubra Bong.) and Oregon white oak (Quercus garryana Dougl.).