Ph.D., Yale University, Forest Ecology, 1990;

M. Phil., Yale University, 1987;

M.S., Yale University, 1985;

B.A., Yale University, Geology and Geophysics, 1981.

Associate Professor, 1999-present

Assistant Professor, SUNY-ESF, 1994-1999;

Visiting Assistant Professor, SUNY-ESF, 1993;

Senior Research Associate, Research Associate, Postdoctoral Associate, Boyce Thompson Institute for Plant Research, 1991-1994;

Research Support Specialist, Center for Environmental Research, Cornell University, 1989-1990;

Fulbright Fellow, Edinburgh University and Institute of Terrestrial Ecology, United Kingdom 1987-88;

Teacher, The Putney School, 1982-83.

Ruth D. Yanai began working at the Hubbard Brook Experimental Forest in 1983, studying the cycling of phosphorus after the whole-tree harvest of Watershed 5. In 1993, the USDA NRICGP funded a project to compare archived and contemporary samples of forest floors, litterfall, and wood, from the HBEF and from a chronosequence of related sites, to determine whether recent changes in nutrient concentrations were more likely due to acid rain or to forest regrowth. Additional research interests include simulation modeling of nutrient uptake by roots and the response of plants to environmental change.

Lucash, M.S., R.D. Yanai, and J.D. Joslin. 2005. Temporal variation in nutrient uptake capacity by intact roots of mature loblolly pine. Plant and Soil 272:253-262.

Yanai, R.D., J.D. Blum, S.P. Hamburg, M.A. Arthur, C.A. Nezat, and T.G. Siccama. 2005. New insights into calcium depletion in northeastern hardwood forests. Journal of Forestry 103:14-20.

Yanai, R.D., R.P. Phillips, M.A. Arthur, T.G. Siccama, and E. Hane. 2005. Spatial and temporal variation in calcium and aluminum in northern hardwood forest floos. Water, Air, and Soil Pollution 160:109-118.

Park, B.B., R.D. Yanai, J.M. Sahm, B.D. Ballard,and L.P. Abrahamson. 2005. Wood ash effects on plant and soil in a willow bioenergy plantation. Biomass and Bioenergy 28:355-365.

Ray, D.G., R.D. Yanai, and R.D. Nyland. 2004. Height development of upper canopy trees within even-aged Adirondack northern hardwood stands. Northern Journal of Applied Forestry 21:117-122.

Park, B.B., R.D. Yanai, J.M. Sahm, B.D. Ballard, and L.P. Abrahamson. 2004. Wood ash effects on soil solution and nutrient budgets in a willow biomass plantation. Water, Air, and Soil Pollution 159:209-224.

Phillips, R.P. and R.D. Yanai. 2004. The effects of AlCl3 on rhizosphere soil and fine root chemistry of sugar maple (Acer saccharum). Water, Air, and Soil Pollution 159:339-356.

Yanai, R.D., D.G. Ray, and T.G. Siccama. 2004. Lead reduction and distribution in the forest floor of New Hampshire northern hardwoods. Journal of Environmental Quality 33:141-148.

Yanai, R.D., H. Majdi, and B.B. Park. 2003. Measured and modeled differences in nutrient concentrations between rhizosphere and bulk soil in a Norway spruce stand. Plant and Soil 257:133-142.

Yanai, R.D., S.V. Stehman, M.A. Arthur, C.E. Prescott, A.J. Friedland, T.G. Siccama, and D. Binkley. 2003. Detecting change in forest floor carbon. Soil Sci. Soc. Am. J. 67:1583-1593.

Yanai, R.D., W.S. Currie, and C.L. Goodale. 2003. Soil carbon dynamics following forest harvest: an ecosystem paradigm reviewed. Ecosystems 6:197-212.

Yanai, R.D. and D.M. Eissenstat. 2003. Coping with herbivores and pathogens: a model of optimal root turnover. Functional Ecology 16:865-869.

Currie, W. S., R. D. Yanai, K. Piatek, C. Prescott and C. L. Goodale. 2002. Processes affecting carbon storage in the forest floor and in downed woody debris. Chapter 9 In Kimble, J. M. et al., Eds., The Potential for U.S. Forests to Sequester Carbon and Mitigate the Greenhouse Effect. Lewis, Boca Raton, FL.

Eissenstat, D.M. and R.D. Yanai. In press. Root lifespan, turnover and efficiency. In: Y. Waisel, A. Eshel, and U. Kafkafi (eds.). Plant Roots: The Hidden Half. 3rd Edition. New York: Marcel Dekker, Inc.

Bouma, T.J., D.M. Eissenstat, R.D. Yanai, U. Hartmond, L. Wang, D. Flores, and A. Elkin. 2001. Estimating age-dependent costs and benefits of roots with contrasting lifespan: comparing apples and oranges. New Phytol. 150:685-695

Yanai, R.D., M.A. Arthur, T.G Siccama, and C.A. Federer. 2000. Challenges of measuring forest floor organic matter dynamics: repeated measures from a chronosequence. For. Ecol. Manage. 138:273- 283.

Arthur, M.A., and R.D. Yanai. 2000. Distinguishing the effects of environmental stress and forest succession on changes in the forest floor. Korean J. Ecol. 23:83-88.

Eissenstat, D.M., C. E. Wells, R.D. Yanai and J. L. Whitbeck. 2000. Building fine roots in a changing environment: implications for root longevity. New Phytol. 147:33-42.

Nyland, R.D., D.G. Ray, R.D. Yanai, R.D. Briggs, L. Zhang, R. Cymballa, and M.J. Twery. 2000. Early stand development following even-age reproduction method cuttings in New York northern hardwoods. Can. J. For. Res. 30:67-75.

Yanai, R.D., T.G Siccama, M.A. Arthur, C.A. Federer, and A.J. Friedland. 1999. Accumulation and depletion of base cations in forest floors in the northeastern US. Ecology 80:2774-2787.

Arthur, M. A., T.G. Siccama, and R.D. Yanai. 1999. Calcium and magnesium in wood of six northern hardwood forest species: relations to site characteristics. Can. J. For. Res. 29:339-346.

Taylor, L. A., M.A. Arthur, and R.D. Yanai. 1999. Variation in microbial biomass across a northern hardwood forest successional sequence. Soil Biol. Biochem. 31:431-439.

Yanai, R. D. 1998. The effect of whole-tree harvest on phosphorus cycling in a northern hardwood forest. Forest Ecology and Management 104:281-295

Yanai, R. D., M. J. Twery and S. L. Stout. 1998. Woody understory response to changes in overstory density: thinning in Allegheny Hardwoods. Forest Ecol. Manag. 102:45-60.

Eissenstat, D. M. and R. D. Yanai. 1997. Ecology of root lifespan. Adv. Ecol. Res. 27:1-60.

Williams, M. and R. Yanai. 1996. Multi-dimensional sensitivity analysis and ecological implications of a nutrient uptake model. Plant and Soil 180:311-324.

Yanai, R. D., T. J. Fahey and S. L. Miller. 1995. Efficiency of nutrient acquisition by fine roots and mycorrhizae. pp. 75-103. In: W. K. Smith and T. M. Hinckley (eds.). Resource Physiology of Conifers. Academic Press, New York.

Van Heerden, K. and R. D. Yanai. 1995. Effects of stresses on forest growth in models applied to the Solling spruce site. Ecological Modelling 83:273-282.

Yanai, R. D. 1994. A steady-state model of nutrient uptake improved to account for newly-grown roots. Soil. Sci. Soc. Am. J. 58:1562-1571.

Siccama, T. G., S. P. Hamburg, M. A. Arthur, R. D. Yanai, F. H. Bormann and G. E. Likens. 1994. Corrections to allometric equations and plant tissue chemistry for Hubbard Brook Experimental Forest. Ecology 75:246-248.

Yanai, R. D. 1992. The phosphorus budget of a 70-yr-old northern hardwood forest. Biogeochemistry 17:1-22.

Yanai, R. D. 1992. Competitive interactions between Norway Spruce and Scots Pine at Gisburn Forest, North England. Forestry 65:435-451.

Yanai, R. D. 1991. Soil solution phosphorus dynamics in a whole-tree harvested northern hardwood forest. Soil Sci. Soc. Am. J. 55:1746-1752.

Arthur, Mary, University of Kentucky; Briggs, Russ, SUNY-ESF; Cymbala, R.; Driscoll, Charley, Syracuse University; Eissenstat, David, Penn State; Fahey, Tim, Cornell Univeristy; Federer, C. Anthony, USFS, retired; Friedland, Andy, Dartmouth; Hamburg, Steven, Brown; Kelly, J. Michael, Iowa; Mitchell, Myron, SUNY-ESF; Muetzelfeldt, Robert, Edinburgh; Nyland, Ralph, SUNY-ESF; Ray, David, Woods Hole Res. Center; Santore, Robert, Syracuse University; Siccama, Tom, Yale; Stout, Susan, USFS; Taylor, Laurie, Kentucky; Twery, Mark, USFS; Wells, Christina; Whitbeck, Julie; Williams, Mathew, Ecosystems Center; Zhang, Lianjun SUNY-ESF; Zollweg Carol, Rochester; Aber, John, University of New Hampshire; Arthur, Mary, University of Kentucky; Erikson, Heather, Puerto Rico; Fahey, Tim, Cornell; Giorgio, Vincent, SUNY-ESF; Johnson, Chris, Syracuse University; Joslin, J. Dev, Tennessee; Lucash, Melissa, EPA, Corvallis; Mitchell, Myron, SUNY-ESF; Richter, Dan, Duke; Silver, Whendee, Berkeley; Stottlemyer, Robert, USGS; Volder, Astrid, Penn. State Univ;

Swee May Tang, Elizabeth Hane

Kimberly Bohn, Farrah Fatemi, Peter Homyak, Paul Lilly, Melissa Lucash, and BB Park

Principal Investigator