Large Lakes Observatory

Stephanie Guildford

Assistant Professor

Large Lakes Observatory
University of Minnesota
2205 E. 5th St.,
Research Laboratory Building 213
Duluth, MN 55812

Tel. (218) 726-8064

Fax: (218) 726-6979

email: sguildfo at d.umn.edu

RESEARCH INTERESTS

• Phytoplankton and nutrient dynamics with a focus on the health and productivity of African and North American great lakes.

EDUCATION

University of Manitoba, Ph.D.
University of Manitoba, M.Sc.
Dalhousie University, B.Sc.

COURSES TAUGHT

• Biology 2801 General Ecology

RECENT PUBLICATIONS

Higgins, S.N., Malkin, S. Y., Howell, E. T., Guildford, S.J., Campbell, L., Hiriart-Baer, V., Hecky, R. E. 2007. An ecological review of Cladophora glomerata (Chlorophyta) in the Laurentian Great Lakes. Accepted J. Phycology.

North, R.L, Guildford, S.J., Smith, R.E.H., Twiss, M.R., Kling, H.J. 2007. Nitrogen, phosphorus, and iron colimitation of phytoplankton communities in the nearshore and offshore regions of the African Great Lakes. Accepted. Verh. Internat. Verein. Limnol.

Gondwe, M.J., Guildford, S.J., Hecky, R.E. 2007. Sandy shore benthic N2-fixation in Lake Malawi, Africa. Accepted. Verh. Internat. Verein. Limnol.

Gondwe, M. J., Guildford, S.J., Hecky. 2007. Planktonic nitrogen fixation in Lake Malawi/Nyasa. In press. Hydrobiologia.

Guildford, S.J., Bootsma, H.A., Taylor, W.D., Hecky, R.E. 2007. High variability of phytoplankton photosynthesis in response to environmental forcing in oligotrophic Lake Malawi/Nyasa. J. Great Lakes Res. 33:170-185.

North, R.L., Guildford, S.J., Smith, R.E.H., Havens, S.M., Twiss, M.R. 2007. The effect of iron on phosphorus and nitrogen bioavailability to phytoplankton communities in the eastern basin of Lake Erie. Limnol. Oceanogr. 52: 315-328.

Depew, D.C., Smith, R.E.H. and Guildford, S.J. 2006. Production and respiration in Lake Erie plankton communities. J. Great Lakes Res. 32:817-832.

Higgins, S.N., Hecky, R.E., Guildford, S.J.2006. Environmental controls of Cladophora growth dynamics in eastern Lake Erie: application of the Cladophora growth model (CGM). J. Great Lakes Res. 32:629-644.

Silsbe, G.M., Hecky, R.E., Guildford, S.J., Mugidde, R. 2006.Variability of chlorophyll a and photosynthetic parameters in a nutrient saturated tropical great lake. Limnol. Oceanogr. 52: 2052-2063.

Depew, D.C., Guildford, S.J. and Smith, R.E.H. 2006. Nearshore-offshore comparison of chlorophyll a (chl a), and phytoplankton production in the dreissenid-colonized eastern basin of Lake Erie. Can. J. Fish. Res. Aquat. Sci. 63:1115-1129.

Guildford, S.J., Hecky, R.E., Smith, R.E.H., Taylor, W.D., Charlton, M.N., Barlow-Busch, L., North, R.L. 2005. Phytoplankton nutrient status in Lake Erie in 1997. J. Great Lakes Res. 31 Supplement 2. 72-88.

Smith, R.E.H., Hiriart, V.P., Higgins, S.N., Guildford, S.J. and Charlton, M.N. 2005. Planktonic primary production in the offshore waters of dreissenid-infested Lake Erie in 1997. J. Great Lakes Res. 31 Supplement 2 50-62.

Higgins, S.N., R.E. Hecky and S.J. Guildford. 2005. Modeling the growth, biomass, and tissue phosphorus concentration of Cladophora glomerata in eastern Lake Erie: Model description and field testing. J. Great Lakes Res. 31:439-455.

Higgins, S.N., Howell, E.T., Hecky, R.E., Guildford, S.J. and Smith, R.E.H. 2005. The wall of green: the status of Cladophora glomerata on the northern shores of Lake Erie's east basin, 1996-2002. J. Great Lakes Res. 31:547-563.

Hecky, R.E., Smith, R.E.H., Barton, D.R., Guildford, S.J., Taylor, W.D., Howell, T.D., and Charlton, M.N. 2004. The nearshore shunt: a consequence of ecosystem engineering by dreissenids in the Laurentian Great Lakes. Can J. Fish Aquatic Sci. 61:1285-1293.

Guildford, S. J., R.E. Hecky, W.D. Taylor, R. Mugidde, H.A. Bootsma. 2003. Nutrient enrichment experiments in tropical Great Lakes Malawi/Nyasa and Victoria. J. Great Lakes Res. 29:(Supplement 2):89-106.

Baut, P., P.S. Ramlal, S.J. Guildford. 2002. The relationship between organic matter, invertebrates and bacteria in the sediments of Lake Malawi. Aquat. Ecosystem Health and Management. 5:307-313.

Hiriart, V.P., B.M. Greenberg, S.J. Guildford, R.E.H. Smith. 2002. Effects of ultraviolet B radiation on rates and size distribution of primary production by Lake Erie phytoplankton. Can. J. Fish. Res. Aquat. Sci. 59: 317-328.

Guildford, S.J., H.A. Bootsma, E.J. Fee, R.E. Hecky and G. Patterson. 2000. Phytoplankton nutrient status and mean water column light intensity in Lakes Malawi and Superior. Aquatic Ecosystem Health and Management. 3: 35-45.

Guildford, S.J. and R.E. Hecky. 2000 Total nitrogen, total phosphorus and nutrient limitation in lakes and oceans: Is there a common relationship? Limnol. Oceanorgr. 45: 1213-1223.