Stephen B. Horsley

USDA Forest Service
Northeastern Research Station
P.O. Box 267
Irvine , PA 16329-0267
Phone: (814) 563-1040
Fax: (814) 563-1048
E-mail: shorsley@fs.fed.us

Education:

Career Summary:

Since 1972, I have worked as a Plant Physiologist at the USDA Forest Service Northeastern Research Station and have been located at the Forestry Sciences Laboratory in Warren, PA, since 1973.

During my career, I have worked extensively on problems of forest regeneration, including plant-plant and herbivore-plant interference relationships, and methods of vegetation management. Recently I have been a member of a collaborative team that studies the factors contributing to sugar maple decline in Pennsylvania.

I serve as an Associate Editor of the Canadian Journal of Forest Research and previously was an Associate Editor of Forest Science. I have also served as national chairman of the Society of American Foresters Physiology Working Group and chairman of Division 2.08 of the International Union of Forestry Research Organizations. I currently hold Adjunct Professor positions at the School of Forest Resources at the Pennsylvania State University and at the State University of New York, College of Environmental Science and Forestry.

Specific Experience:

• Research Plant Physiologist, USDA Forest Service, Northeastern Research Branch Forestry Sciences Laboratory; Warren, PA. 1973 - Present

Civic and Professional Affiliations:

• Ecological Society of America
• Society of American Foresters

Selected Publications:

• Horsley, S. B. 1981. Control of herbaceous weeds in Allegheny hardwood forests with herbicides. Weed Sci. 29:655‑662. 

• Horsley, S.B.; Bjorkbom, J. C. 1983. Herbicide treatment of striped maple and beech in Allegheny hardwood stands. For. Sci. 29:103‑112. 

• Horsley, S.B.; Marquis, D.A. 1983. Interference by weeds and deer with Allegheny hardwood reproduction. Can. J. For. Res. 13:61‑69. 

• Horsley, S.B. 1988. Control of understory vegetation in Allegheny hardwood stands with Oust. North. J. Appl. For. 5(4):261‑262.

• Horsley, S.B. 1990. Control of grass and sedge in Allegheny hardwood stands with Roundup‑residual herbicide tank mixes.  North. J. Appl. For. 7(3):124‑129. 

• Horsley, S.B. 1990. Tank mixing Roundup with adjuvants and other herbicides for striped maple control.  North. J. Appl. For. 7:19‑22. 

• Horsley, S.B. 1991. Using Roundup and Oust to control interfering understories in Allegheny hardwood stands. p. 281‑290. In Proc. Central Hardwood For. Conf.  4‑6 March 1991.  University Park, PA. McCormick, L. H.; Gottschalk, K. W. eds. USDA For. Serv. Gen. Tech. Rep. NE‑148. 

• Horsley, S.B.; McCormick, L.H.; Groninger, J.W. 1992. Effects of timing of Oust application on survival of hardwood seedlings. North. J. Appl. For. 9:22‑27. 

• Horsley, S.B.; Gottschalk, K.W. 1993. Leaf area and net photosynthesis during development of Prunus serotina seedlings. Tree Physiol. 12:55‑69. 

• Horsley, S.B. 1993. Role of allelopathy in hayscented fern interference with black cherry regeneration. J. Chem. Ecol. 19:2737‑2755. 

• Horsley, S.B. 1993. Mechanisms of interference between hayscented fern and black cherry. Can. J. For. Res. 23:2059‑2069. 

•  Long, R.P., Horsley, S.B., Lilja, P.R. 1997. Impact of forest liming  on growth and crown vigor of sugar maple and associated hardwoods.  Can. J. For. Res. 27: 1560-1573.

•  Ristau, T.E., Horsley, S.B. 1999. Pin cherry effects on Allegheny hardwood stand development. Can. J. For. Res. 29: 73-84.

•  Horsley, S.B., Long, R.P. eds. 1999. Sugar maple ecology and health: Proceedings of an international symposium. USDA For. Serv. Gen. Tech. Rep. NE-261. 120 p

•  Horsley, S.B., Long, R.P., Bailey, S.W., Hallett, R.A., Hall, T.J. 2000. Factors associated with the decline-disease of sugar maple on the Allegheny Plateau. Can. J. For. Res. 30: 1365-1378. 

• Horsley, S.B., Long, R.P., Bailey, S.W., Hallett, R.A., Wargo, P.M. 2002. Health of eastern North American sugar maple forests and factors affecting decline. North. J. Appl. For. 19: 34-44.

•  Horsley, S.B., Stout, S.L., deCalesta, D.S. 2003. White-tailed deer impact on the vegetation dynamics of a northern hardwood forest. Ecol. Appl. 13: 98-118.

•  Bailey, S.W., Horsley, S.B., Long, R.P., Hallett, R.A. 2004. Influence of edaphic factors on sugar maple nutrition and health on the Allegheny Plateau. Soil Sci. Soc. Amer. J. 68: 243-252.

•  Bailey, S.W., Horsley, S.B., Long, R.P. 2005. Thirty years of change in forest soils of the Allegheny Plateau, Pennsylvania. Soil Sci. Soc. Amer. J. 69: 681-690.

•  Bailey, S.W., Horsley, S.B., Long, R.P. 2005. Response to "Comments on "Thirty years of change in forest soils of the Allegheny Plateau, Pennsylvania'". Soil Sci. Soc. Amer. J. 69: 2077-2078.

•  Latham, R.E., Beyea, J., Benner, M., Dunn, C.A., Fajvan, M.A., Freed, R.R., Grund, M., Horsley, S.B., Rhoads, A.F., Shissler, B.P. 2005. Managing white-tailed deer in forest habitat from an ecosystem perspective: Pennsylvania case study. 2005. Report by the Deer Management Forum for Audubon Pennsylvania and Pennsylvania Habitat Alliance, Harrisburg. xix + 340pp.