- B.S., 1974, University of Michigan, Ann Arbor
- M.S., 1978, University of Michigan, Ann Arbor
- Ph.D., 1983, University of Michigan, Ann Arbor
Forest ecology, forest succession, stand and landscape structure and dynamics, old growth forest ecology and conservation; overstory-understory relationships; coupled natural and human systems.
- National Commission on Science for Sustainable Forestry. Assessing the scientific basis for standards/practices at the stand, management unit, landscape and regional level. $284,000. 2003-2005. Lead PI.
- Joint Fire Sciences Program. Effects of disturbance history, landscape pattern, and weather on wildfire severity in southwestern Oregon: implications for management of a fire-prone landscape. $291,333. 2004-2006. PI.
- NSF. Long-term Ecological Research at the H.J. Andrews Experimental Forest. $5,640,000. 2008-2014. Co-PI.
Landscape dynamics in mixed-severity fire regimes; forest policy effects; old-growth forest conservation in fire-prone landscapes.
- Spies, T. A., M. A. Hemstrom, A. Youngblood, and S. Hummel. 2006. Conserving old-growth forest diversity in disturbance-prone landscapes. Conservation Biology 20(2): 351-362.
- Spies, T. A., K. N. Johnson , K. M. Burnett, J. L. Ohmann, B. C. McComb, G. H. Reeves, P. Bettinger, J. D. Kline, and B. Garber-Yonts. 2007. Cumulative ecological and socio-economic effects of forest policies in coastal Oregon. Ecological applications 17(1); 5-17.
- Thompson, J.R., T. A. Spies, and L. M. Ganio. Reburn severity in managed and unmanaged vegetation in a large wildfire. 2007. Proceedings of the National Academy of Science 104 (25) 10743-10748.
- Nonaka, E., T. A. Spies, M.C. Wimberly, and J.L. Ohmann. 2007. Historical range of variability (HRV) in live and dead wood biomass: a regional-scale simulation study. Canadian Journal of Forest Research 37 (11): 2349-2364.