Professor Emeritus


Primary interests

My primary interests are silviculture and forest ecology; research topics include stand dynamics in managed and unmanaged forests; ecology of natural regeneration; comparative stand development and productivity of pure and mixed stands.

Current Projects

  • Natural regeneration of understory vegetation in Southern New England forests, involving issues of silvicultural methods, deer browsing, and competition from hay-scented ferns.
  • Long-term ecological monitoring of the system of Forest Reserves that have been recently established in Massachusetts.
  • Regeneration of mahogany and associated species in the Yucatan region of Mexico: seed production and dispersal, and seedling survival and growth.


  • NRC 100 Environment and Society
  • NRC 526 Silviculture
  • ECO 604 Forest Stand Dynamics


Smith, DM., B.C. Larson, M.J. Kelty, and P.M.S. Ashton. 1997. The Practice of Silviculture. Ninth edition. John Wiley, New York. 537 p.  (new edition in progress)

Research Articles

Ribbons, R., D. Orwig, N. Pederson, M. Kelty. In preparation. Disturbance and climate effects on red spruce (Picea rubens) at its southern continuous range.

Duguid, M., B. Frey, D. Ellum, M. Kelty, M. Ashton. In preparation. The influence of ground disturance and gap position on understory plant diversity across New England.

Kelty, M., L. Camara-Cabrales, J. Grogan. 2011. Red oak in southern New England and big-leaf mahogany in the Yucatan Peninsula: can mixed-species forests be sustainably managed for single-species production? Journal of Sustainable Forestry 30 (7) 637-653.

Aikens, M.L., D. Ellum, J.J. McKenna, M.J. Kelty, and M.S. Ashton. 2007. The effects of disturbance intensity on temporal and spatial patterns of herb colonization in a southern New England mixed-oak forest. Forest Ecology and Management 252:144-158.

Kelty, M.J. 2006. The role of species mixtures in plantation forestry. Forest Ecology and Management 233:195-204.

de la Crétaz, A., and M.J. Kelty. 2006. Control of hay-scented fern by mowing. Northern Journal of Applied Forestry 23(3):149-154.

Snook, L.K., L. Camara-Cabrales, and M.J. Kelty. 2005. Six years of fruit production by mahogany trees (Swietenia macrophylla King): patterns of variation and implications for sustainability. Forest Ecology and Management 206:221-235.

Kelty, M.J., F.D. Menalled, and M.M. Carlton. 2004. Nitrogen dynamics and red pine growth following application of pelletized biosolids in Massachusetts, U.S.A. Canadian Journal of Forest Research 34:1477-1487.

Kelty, M.J., D.B. Kittredge, Jr., T. Kyker-Snowman, and A.D. Leighton. 2003. The conversion of even-aged stands to uneven-aged structure in southern New England. Northern Journal of Applied Forestry 20:109-116.

de la Cretaz, A., and M.J. Kelty. 2002. Development of tree regeneration in fern-dominated forest understories following reduction of deer browsing. Restoration Ecology 10:416-426).