Abstract
We developed a spatially-explicit gap dynamics simulation model to evaluate the effects of disturbances at the scale of a landscape for a semiarid grassland in northcentral Colorado, USA. The model simulates the establishment, growth, and death of individual plants on a small plot through time at an annual time step. Long-term successional dynamics on individual plots (single gaps) and on a landscape composed of a grid of plots were evaluated. Landscapes were simulated as either a collection of independent plots or as a collection of interacting plots where processes on one plot were influenced by processes on adjacent plots. Because we were interested in the recovery of the dominant plant species, the perennial grass blue grama (Bouteloua gracilis (H.B.K.) Lag. ex Griffiths) after disturbances, we focused on scale-dependent processes, such as seed dispersal, that are important to the recruitment of individuals of B. gracilis.
The type of simulated landscape was important to the recovery time of B. gracilis after a disturbance. Landscapes composed of independent plots recovered more rapidly following a disturbance than landscapes composed of interacting plots in which the recovery time was dependent on the spatial scale of the disturbance.
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References
Botkin, D.B., Janak, J.F. and Wallis, J.R. 1972. Some ecological consequences of a computer model of forest growth. J. Ecol. 60: 849–873.
Briske, D.D. and Wilson, A.M. 1977. Temperature effects on adventitious root development in blue grama seedlings. J. Range Mgmt. 30: 276–280.
Coffin, D.P. 1988. Gap-phase dynamics and succession in the shortgrass steppe. Ph.D. Dissertation, Colorado State University; Fort Collins, Colorado.
Coffin, D.P. and Lauenroth, W.K. 1988. The effects of disturbance size and frequency on a shortgrass plant community. Ecology 69: 1609–1617.
Coffin, D.P. and Lauenroth, W.K. 1989. Spatial and temporal variation in the seed bank of a semiarid grassland. Amer. J. Bot. 76: 53–58.
Coffin, D.P. and Lauenroth, W.K. A gap dynamics simulation model of succession in a semiarid grassland. Ecol. Modelling, submitted.
Costello, D.F. 1944. Natural revegetation of abandoned plowed land in the mixed prairie association of northeastern Colorado. Ecology 25: 312–326.
Delcourt, H.R., Delcourt, P.A. and Webb, T. III. 1983. Dynamic plant ecology: the spectrum of vegetational change in space and time. Quater Sci. Rev. 1: 153–175.
Dickinson, C.E. and Dodd, J.L. 1976. Phenological pattern in the shortgrass prairie. Amer. Midl. Nat. 96(2): 367–378.
Forman, R.T.T. and Godron, M. 1981. Patches and structural components for a landscape ecology. Bioscience 31(10): 733–740.
Forman, R.T.T. and Godron, M. 1986. Landscape ecology. John Wiley & Sons, New York.
Greene, D.F. and Johnson, E.A. 1986. Dispersal capacity and seed production in anemochorous plants. Oecologia (Berl) 68: 629–631.
Hyder, D.N., Everson, A.C. and Bement, R.E. 1971. Seedling morphology and seeding failures with blue grama. J. Range Mgmt 24: 287–292.
Judd, I.B. 1974. Plant succession of old fields in the Dust Bowl. Southwest Nat. 19: 227–239
Judd, I.B. and Jackson, M.L. 1939. Natural succession of vegetation on abandoned farmland in the Rosebud soil area of western Nebraska. J. Amer. Soc. Agron. 39: 541–547.
Lauenroth, W.K., Dodd, J.L. and Sims, P.L. 1978. The effects of water- and nitrogen-induced stresses on plant community structure in a semiarid grassland. Oecologia (Berl) 36: 211–222.
Lauenroth, W.K., Sala, O.E. and Kirchner, T.B. 1987. Soil water dynamics and the establishment of seedlings of Bouteloua gracilis in the shortgrass steppe: a simulation analysis. Abstracts 40th Annual Mtg. Society for Range Mgmt, Boise, Idaho.
McGregor, R.L. 1986. Flora of the Great Plains. University Press of Kansas, Lawrence, Kansas.
Noy-Meir, I. 1973. Desert ecosystems: environment and producers. Ann. Rev. Ecol. Syst. 4: 25–51.
Pickett, S.T.A. and White, P.S. 1985. The ecology of natural disturbance and patch dynamics. Academic Press, Orlando, Florida.
Rabinowitz, D. and Rapp, J.K. 1981. Dispersal abilities of seven sparse and common grasses from a Missouri prairie. Amer. J. Bot. 68: 616–624.
Reichhardt, K.L. 1982. Succession of abandoned fields in the shortgrass prairie, northeastern Colorado. Southwest Nat. 27: 299–304.
Riegel, A. 1941. Life history habits of blue grama. Kansas Acad. Sci. Trans. 44: 76–83.
Savage, D.A. and Runyon, H.E. 1937. Natural revegetation of abandoned farmland in the central and southern Great Plains. Fourth International Grassland Congress, Aberystwyth, Great Britain, Section 1, Grassland Ecology 178–182.
Shugart, H.H. 1984. A theory of forest dynamics. Springer-Verlag, New York.
Sims, P.L. and Singh, J.S. 1978. The structure and function of ten western North American grasslands. III. Net primary production, turnover and efficiencies of energy capture and water use. J. Ecol. 66 573–597.
Werner, P.A. 1975. A seed trap for determining patterns of seed deposition in terrestrial plants. Canad. J. Bot. 53: 810–813.
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Coffin, D.P., Lauenroth, W.K. Disturbances and gap dynamics in a semiarid grassland: A landscape-level approach. Landscape Ecol 3, 19–27 (1989). https://doi.org/10.1007/BF00157753
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DOI: https://doi.org/10.1007/BF00157753