Perakis, Steven

Assistant Professor (Courtesy), USGS FRESC

Office Location: 
167 FSL
Email Address: 

Ecosystem Biogeochemistry

Educational Background: 
  • B.S., 1990, University of Pennsylvania
  • M.S., 1994, University of Washington
  • Ph.D., 2000, Cornell University
Research Interests: 

Terrestrial Ecosystem Ecology and Biogeochemistry, Nutrient Cycling, Watershed Studies, Riparian Biogeochemistry, Stable Isotopes

Research Support: 
  1. National Science Foundation, “Coupled Nitrogen and Calcium Cycles in Forest Ecosystems: New Insights from Multiple Stable Isotopes.” PI with K. Cromack. $404,444. 2004-2007.
  2. USGS Global Change Research Program, “Consequences of Altered Precipitation for Carbon Sequestration and Biogeochemical Cycling in Temperate Forests.” PI with 5 others. $279,000. 2004-2008
  3. USGS "Cooperative Forest Ecosystem Research." co-PI with 5 others from USGS and OSU. $750,000/yr.
  4. National Science Foundation, "Decomposition of 15N-Labeled Fine Roots and Fate of N Released in Western Oregon, USA and Taiwanese LTER Sites." co-PI with M. Harmon, H. Chen. 2002-2005. $215,000.
Current/Recent Programs: 
Biogeochemistry of old-growth forests; Forest management in late-successional reserves; Base cation - nitrogen interactions in coastal Oregon forests; Ecological responses to Elwha Dam Removal; Cooperative Forest Ecosystem Research (CFER); HJ Andrews Long-Term Ecological Research (LTER).
Selected Publications: 
  1. Perakis, S.S., D.A. Maguire, T.D. Bullen, K. Cromack, R.H. Waring, J.R. Boyle. 2006. Coupled nitrogen and calcium cycles in forests of the Oregon Coast Range. Ecosystems.
  2. Perakis, S.S., J.E. Compton, L.O. Hedin. 2005. Nitrogen retention across a gradient of 15N additions to an unpolluted temperate forest soil in Chile. Ecology 86:96-105.
  3. Rastetter, E.B., S.S. Perakis, G.R. Shaver, G.I. Agren. 2005. Terrestrial carbon sequestration at elevated CO2 and temperature: The role of dissolved organic nitrogen loss. Ecological Applications 15:71-86.
  4. Perakis, S.S. and L.O. Hedin. 2002. Nitrogen loss from unpolluted South American forests mainly via dissolved organic compounds. Nature 415:416-419.