INSTAAR: Tim Seastedt

Fellow of INSTAAR; Professor of Ecology and Evolutionary Biology, Univ. of Colorado at Boulder.

PhD, University of Georgia, 1979.

INSTAAR Directorate Members

Specialty: Terrestrial ecosystems and biogeochemistry.

Research Interests: Biotic interactions with physical and chemical properties of the environment to control patterns of energy flow and material cycling. Emphasis is placed on soil phenomena, particularly those of grassland and tundra ecosystems.

Present Research: Terrestrial ecosystem studies, including factors influencing primary productivity, soil carbon dynamics, decomposition and mineralization processes, and how these processes affect short- and long-term ecosystem-atmosphere interactions. Ongoing research collaborations involve cross-site comparisons of mechanisms controlling nutrient availability, carbon storage, and biotic productivity, invasive species, and ecosystem processes-biodiversity relationships.

Selected Publications:

Seastedt, T.R., Nathan Gregory and David Buckner. 2003. Reduction of diffuse knapweed by biocontrol insects in a Colorado grassland. Weed Science 51: 237-245.
Seastedt, T.R., W.D. Bowman, N. Caine, D. McKnight, A. Townsend, and M. Williams. 2004 The landscape continuum: A Conceptual Model for High Elevation Ecosystems. BioScience 54: 111-122.
Suding, K.N., K.D. LeJeune, and T.R. Seastedt. 2004. Competitive impacts and responses of an invasive weed: dependencies on nitrogen and phosphorus availability. Oecologia 141: 526-535.
Luken, J.O. and T.R. Seastedt. 2004. Plant invasions, management, and the conflict of perspective. Weed Technology 18: 1514-1517.
LeJeune, K.D., K.N. Suding, Sturgis, S., A. Scott and T.R. Seastedt. 2005. Biological control insect use of fertilized and unfertilized diffuse knapweed (Centaurea diffusa Lamarck) in a Colorado grassland. Environmental Entomology 34: 225-234.
Litaor, M.I., T.R. Seastedt, M.D. Walker, M. Carbone, and A. Townsend. 2005. The biogeochemistry of phosphorus across an alpine topographic/snow gradient. Geoderma 124: 49-61.
Heather E. Reed, Timothy R. Seastedt, and John M. Blair. 2005. Ecological consequences of C4 grass invasion of a C4 grassland: A dilemma for management. Ecological Applications 15: 1560-1569.
Seastedt, T.R., K.N. Suding and K.D. LeJeune. 2005. Understanding Invasions: The rise and fall of diffuse knapweed (Centaurea diffusa) in North America. Pages 129-139 In: Inderjit (Ed.) Invasive plants: ecological and agricultural aspects. Basal, Switzerland: Birkhauser-Verlag AG.
Seastedt, T.R. 2005. Soil biology and the emergence of adventive grassland ecosystems. Pages 15-24 in: S.C. Jarvis, P.J. Murray and J.A. Roker. Optimization of nutrient cycling and soil quality for sustainable grasslands. Wageningen Academic Publishers, The Netherlands.
Sherrod, S.K., T.R. Seastedt and M.D. Walker. 2005. Northern pocket gopher (Thomomys talpoides) control of alpine plant community structure. Arctic, Antarctic and Alpine Research 37: 585-590.
LeJeune, K. D., K. N. Suding, and T.R. Seastedt. 2006. Nutrient availability does not explain invasion and dominance of a mixed grass prairie by the exotic forb Centaurea diffusa Lam. Applied Soil Ecology. 32: 98-110.
Seastedt, T.R., K.N. Suding, 2007, Biotic constraints on the the invasion of diffuse knapweed (Centaurea diffusa) in a Colorado grassland. Oecologia (in press).

See Also:

Tim R. Seastedt