• PBIO 247 (Vegetation of North America)
• PBIO 425/525 (Plant Ecology)

• Promotion Committee (Chair)
• Executive Committee

Investigations of the effects of soil salinity on the growth, distribution, and population dynamics of halophytes are being carried out in my laboratory. Factors affecting seed germination and the relationship between seed dormancy and environmental conditions are being studied. The relationship between soil seed banks and plant community composition in various community types is of interest in predicting plant community structure and dynamics from seed banks. Research involves both laboratory and field investigations of the ecology of plants in extreme and disturbed environments.

• Carter, C.T. and I.A. Ungar. 2002. Aboveground vegetation, seed bank and soil analysis of a 31-year old forest regeneration on coal mine spoil in southeastern Ohio. American Midland Naturalist 147: 44-59.
• Ungar, I.A. 2001. Seed banks and seed population dynamics of halophytes. Wetlands Ecology and Management 9: 499-510. ·
• Khan, M.A. and I.A. Ungar. 2001. Alleviation of salinity stress and the response to temperature in two seed morphs of Halopyrum mucronatum (Poaceae). Australian Journal of Botany 49: 777-783. ·
• Ungar, I.A. and M.A. Khan. 2001. Effects of bracteoles on seed germination and dispersal of two species of Atriplex. Annals of Botany 87: 233-239.
• Khan, M.A., I.A. Ungar and A.M. Showalter. 2000. Effects of salinity on growth, water relations and ion accumulation of the subtropical perennial halophyte, Atriplex griffithii var. stocksii. Annals of Botany 85: 225-232.
• Egan, T.P. and I.A. Ungar. 2000. Similarity between seed bank and above-ground vegetation along a salinity gradient. Journal of Vegetation Science 11: 189-194.
• Egan, T. P. and I. A. Ungar. 1999. The effects of temperature and seasonal change on the germination of two salt marsh species, Atriplex prostrata and Salicornia europaea, along a salinity gradient. International Journal of Plant Science 160: 861-867.
• Ungar, I.A. 1998. Are biotic factors significant in influencing the distribution of halophytes in saline habitats? Botanical Review 64: 176-199.
• Keiffer, C.H. and I.A. Ungar. 1997. The effect of extended exposure to hypersaline conditions on the germination of five inland halophyte species. American Journal of Botany 83: 104-111.
• Ungar, I.A.1996. Effect of salinity on seed germination, growth, and ion accumulation of Atriplex patula (Chenopodiaceae). American Journal of Botany 83:604-607.
• Ungar, I.A. and S.R.J. Woodell. 1996. Similarity of seed banks to above ground vegetation in grazed and ungrazed salt marsh communities on the Gower Peninsula, South Wales. International Journal of Plant Sciences 157: 746-749.
• Ungar, I.A. 1995. Seed germination and seed bank ecology in halophytes. In: Kigel , J., M. Negbi, and G. Galili (eds.), Seed Development and Germination, Pp. 599-628. Marcel Dekker, New York.

• A comparative study of the germination and recovery of seeds when exposed to hypersaline conditions
• The relationship between the species composition and density of seeds in seed banks and plant community composition of salt marsh communities
• The effect of salinity on the growth and ion content of Atriplex prostrata
• Demography of the endangered species Froelichia floridana in Ohio
• The influence of bracts on the germination of Atriplex spp. · Seed demography of halophytes
• The effect of betaine, proline and growth regulators on germination

Current Graduate Students

Christy Tucker Carter