Scientists & Staff
- My research has focused on recovery of herbaceous vegetation following forest management. I have worked on developing methods for sampling herbaceous plants and am involved in two studies assessing the impact of herbicide application on recovery of herbs.
- I am investigating the role of buried seed as a mechanism in vegetation recovery. I am interested in recognizing silvicultural problems and opportunities during the early stem exclusion phase of stand development and have studied the role of pin cherry during that phase.
- I am currently analyzing data from a long-term cleaning/crop tree release study established in 1936 on the Kane Experimental Forest.
- I will continue to monitor herbaceous plant communities following management activities to determine what changes might occur and whether these changes are permanent or temporary.
- I plan to work with others to recognize the conditions that result in monoculture following overstory removal and to apply existing silvicultural practices in ways to promote mixed species regeneration. Understanding the competitive ability of species like black birch, black cherry, and pin cherry are important. Understanding establishment requirements and creating conditions favorable for species like cucumber, yellow-poplar, white ash, red maple, and sugar maple to become established where possible is also critical.
Why This Research is Important
Our mission is to enhance the basic understanding of Allegheny Plateau forest ecosystems and to develop resource management guidelines. Understanding how management activities alter the herbaceous plant community in stands under a variety of management strategies is critical to the practice of ecosystem management. Understanding the competitive ability of species like black birch, black cherry, and pin cherry are important. Understanding establishment requirements and creating conditions favorable for species like cucumber tree, yellow-poplar, white ash, red maple, and sugar maple to become established where possible is critical.
- The State University of New York, College of Env. Sci. and For., Ph.D. , 2010
- The Pennsylvania State University, MS Forest Science, 1997
- Houghton College, BS Biology, 1991
- Ecological Society of America (1995 - Present)
- Torrey Botanical Society (1998 - Present)
- Society of American Foresters (1995 - Present)
Featured Publications & Products
- Ristau, Todd E.; Stoleson, Scott H.; Horsley, Stephen B.; deCalesta, David S. 2011. Ten-year response of the herbaceous layer to an operational herbicide-shelterwood treatment in a northern hardwood forest.
- Nuttle, Tim; Yerger, Ellen H.; Stoleson, Scott H.; Ristau, Todd E. 2011. Legacy of top-down herbivore pressure ricochets back up multiple trophic levels in forest canopies over 30 years.
- Brose, Patrick H.; Gottschalk, Kurt W.; Horsley, Stephen B.; Knopp, Peter D.; Kochenderfer, James N.; McGuinness, Barbara J.; Miller, Gary W.; Ristau, Todd E.; Stoleson, Scott H.; Stout, Susan L. 2008. Prescribing regeneration treatments for mixed-oak forests in the Mid-Atlantic region.
- Horsley, Stephen B.; Bailey, Scott W.; Ristau, Todd E.; Long, Robert P.; Hallett, Richard A. 2008. Linking environmental gradients, species composition, and vegetation indicators of sugar maple health in the northeastern United States.
- Ristau, Todd E.; Horsley, Stephen B. 2006. When is pin cherry (Prunus pensylvanica L.) a problem in Allegheny hardwoods?.
Publications & Products
- Nuttle, Tim; Ristau, Todd E.; Royo, Alejandro A. 2014. Long-term biological legacies of herbivore density in a landscape-scale experiment: forest understories reflect past deer density treatments for at least 20 years.
- Trager, Matthew D.; Ristau, Todd E.; Stoleson, Scott H.; Davidson, Robert L.; Acciavatti, Robert E. 2013. Carabid beetle responses to herbicide application, shelterwood seed cut and insect defoliator outbreaks.
- Royo, Alejandro A.; Ristau, Todd E. 2013. Stochastic and deterministic processes regulate spatio-temporal variation in seed bank diversity.
- Huebner, Cynthia D.; Hutchinson, Todd; Ristau, Todd; Royo, Alejandro; Steinman, James. 2012. Documenting the Regional and local distribution of Kalmia latifolia and Rosa multiflora in West Virginia, Ohio, and Pennsylvania Forests along a soil fertility gradient.
- Goetsch, Chandra; Wigg, Jennifer; Royo, Alejandro A.; Ristau, Todd; Carson, Walter P. 2011. Chronic over browsing and biodiversity collapse in a forest understory in Pennsylvania: Results from a 60 year-old deer exclusion plot.
- Stoleson, Scott H.; Ristau, Todd E.; deCalesta, David S.; Horsley, Stephen B. 2011. Ten-year response of a forest bird community to an operational herbicide-shelterwood treatment in Allegheny hardwoods.
- Morin, Randall S.; Liebhold, Andrew M; Gottschalk, K.W.; Woodall, Chris W.; Twardus, Daniel B.; White, Robert L.; Horsley, Stephen B.; Ristau, Todd E. 2006. Analysis of forest health monitoring surveys on the Allegheny National Forest (1998-2001).
- Stout, Susan L.; Hoover, Coeli M.; Ristau, Todd E. 2006. Listening to old beech and young cherry trees - long-term research in the Alleghenies.
- Stout, Susan L.; Ristau, Todd E. 2005. Long-term Research on the USFS Kane Experimental Forest in Northwestern Pennsylvania.
- Ristau, Todd E.; Horsley, Stephen B.; McCormick, Larry H. 2001. Sampling to assess species diversity of herbaceous layer vegetation in Allegheny hardwood forests.
- Ristau, Todd E.; Horsley, Stephen B. 1999. Pin cherry effects on Allegheny hardwood stand development.
- McCormick, Larry H.; Groninger, John W.; Penrod, Kathy A.; Ristau, Todd E. 1993. Deer exclusion effects on understory development following partial cutting in a Pennsylvania oak stand.
National Research Highlights
|Long-Term Differences in Forests With Different Deer Densities|
Thirty years after a study on the effects of deer on forest ecosystems established new forest stands at deer densities ranging from 10 to 64 dee ...