Abstract
Effects of fire and small-scale soil disturbances on species richness, community heterogeneity, and microsuccession were investigated in a central Oklahoma tallgrass prairie. In the fall of 1985, 0.2 m2 soil disturbances were created on burned and unburned tallgrass prairie. Vegetation on and off disturbances was sampled at monthly intervals over two growing seasons. During the first growing season, the cover of forbs and annuals, and species richness were significantly greater on versus off disturbances, but these differences did not persist through the second year. The variation in species composition among disturbed plots (heterogeneity) was significantly greater compared to undisturbed areas throughout the study. Fire had no consistent effect on richness and heterogeneity of vegetation on soil disturbances but fire reduced heterogeneity on undisturbed vegetation. Rate of succession, based on an increase in cumulative cover of perennial grasses over time, did not differ among treatments during the first growing season. During the second year, rate of succession was significantly greater on burned soil disturbances compared to unburned soil disturbances. These results suggest that while small-scale soil disturbances have primarily short-lived effects on grassland community structure, disturbances do help to maintain spatial and temporal variation in tallgrass prairie communities. Unlike in undisturbed vegetation, however, species richness and heterogeneity on soil disturbances were little effected by fire, but the rate of colonization onto disturbances appeared to be enhanced by fire.
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References
Abrams M. D. 1988. Effects of burning regime on viable seed pools and canopy coverage in a northern Kansas tallgrass prairie. Southw. Nat. 33: 65–70.
Allen T. F. A. & Wyleto E. P. 1983. A hierarchical model for the complexity of plant communities. J. Theor. Biol. 101: 529–540.
Belsky A. J. 1986a. Revegetation of artificial disturbances in grasslands of the Serengeti National Park, Tanzania. I. Colonization of grazed and ungrazed plots. J. Ecol. 74: 419–438.
Belsky A. J. 1986b. Revegetation of artificial disturbances of the Serengeti National Park, Tanzania. J. Ecol. 74: 937–952.
Belsky A. J. 1987. Revegetation of natural and human caused disturbances in the Serengeti National Park, Tanzania. Vegetatio 70: 51–60.
Collins S. L. 1987. Interaction of disturbances in tallgrass prairie: a field experiment. Ecology 68: 1243–1250.
Collins S. L. 1989. Fire as a disturbance in grassland communities. In: Collins S. L. & Wallace L. L. (eds), Fire in tallgrass prairie ecosystems. Univ. Oklahoma Press, Norman, in press.
Collins S. L. & Barber S. C. 1985. Effects of disturbance on diversity in mixed-grass prairie. Vegetatio 64: 87–94.
Collins S. L. & Gibson D. J. 1989. Effects of fire on community structure in mixed-and tallgrass prairie. In: Collins S. L. & Wallace L. L. (eds), Fire in tallgrass prairie ecosystems. Univ. Oklahoma Press, Norman, in press.
Collins S. L. & Glenn S. M. 1988. Disturbance and community structure in North American prairies. In: During H. J., Werger M. J. A. & Willems J. H. (eds), Diversity and pattern in plant communities, pp. 131–143. S.P.B. Academic Publ., The Hague.
Collins S. L. & Uno G. E. 1983. The effects of early spring burning on vegetation in buffalo wallows. Bull. Torrey Bot. Club 110: 474–481.
Connell J. H. 1978. Diversity in tropical rain forests and coral reefs. Science 199: 1302–1310.
Foster M. A. & Stubbendieck J. 1980. Effectsof plains pocket gopher (Geomys bursarius) on rangeland. J. Range Manage. 33: 74–78.
Gibson D. J. 1988. Regeneration and fluctuation in tallgrass prairie vegetation in response to burning frequency. Bull. Torrey Bot. Club 115: 1–12.
Gibson D. J. & Hulbert L. C. 1987. Effects of fire, topography and year-to-year climatic variation on species composition in tallgrass prairie. Vegetatio 72: 175–185.
Hobbs R. J. & Hobbs V. J. 1987. Gophers and grassland: a model of vegetation response to patchy soil disturbance. Vegetatio 69: 141–146.
Hobbs R. J. & Mooney H. A. 1985. Community and population dynamics of serpentine grassland annuals in relation to gopher disturbance. Oecologia 67: 342–351.
Hulbert L. C. 1969. Fire and litter effects in undisturbed bluestem prairie in Kansas. Ecology 50: 874–877.
Huntly N. & Inouye R. 1988. Pocket gophers in ecosystems: patterns and mechanisms. BioScience 38: 786–793.
Inouye R. S., Huntly N. J., Tilman D. & Tester J. R. 1987a. Pocket gophers (Geomys bursarius), vegetation, and soil nitrogen along a successional sere in east central Minnesota. Oecologia 72: 178–184.
Inouye R. S., Huntly N. J., Tilman D., Tester J. R., Stillwell M. & Zinnel K. C. 1987b. Old-field succession on a Minnesota sand plain. Ecology 68: 12–26.
Johnstone I. M. 1986. Plant invasion windows: a time-based classification of invasion potential. Biol. Rev. 61: 369–394.
King T. J. 1977. The ecology of ant-hills in calcareous grasslands. I. Patterns of species in relation to ant-hills in southern England. J. Ecol. 65: 235–256.
Knapp A. K. 1985. Effect of fire and drought on the ecophysiology of Andropogon gerardii and Panicum virgatum in a tallgrass prairie. Ecology 66: 1309–1320.
Koide R. T., Huenneke L. F. & Mooney H. A. 1987. Gopher mound soil reduces growth and affects ion uptake of two annual grassland species. Oecologia 72: 284–290.
Pickett S. T. A., Collins S. L. & Armesto J. J. 1987. A hierarchical consideration of causes and mechanisms of succession. Vegetatio 69: 109–114.
Pickett S. T. A. & White P. S. 1985. The ecology of natural disturbance and patch dynamics. Academic Press, New York.
Platt W. J. & Weis I. M. 1977. Resource partitioning and competition within a guild of fugitive prairie plants. Am. Nat. 111: 479–513.
Platt W. J. & Weis I. M. 1985. An experimental study of competition among fugitive prairie plants. Ecology 66: 708–720.
Sokal R. R. & Rohlf F. J. 1981. Biometry. W. H. Freeman and Co., San Francisco.
Sneath P. H. A. & Sokal R. R. 1973. Numerical taxonomy. W. H. Freeman and Co., San Francisco.
Sousa W. P. 1984. Intertidal mosaics: patch size, propagule availability, and spatially variable patterns of succession. Ecology 65: 1918–1935.
Sousa W. P. 1985. Disturbance and patch dynamics on rocky intertidal shores. In: Pickett S. T. A. & White P. S. (eds), The ecology of natural disturbance and patch dynamics, pp. 101–124. Academic Press, New York.
Svejcar T. J. & Browning J. A. 1988. Growth and gas exchange of Andropogon gerardii as influenced by burning. J. Range Manage. 41: 239–244.
Tilman D. 1985. The resource-ratio hypothesis of plant succession. Am. Nat. 125: 827–852.
Whicker A. D. & Detling J. K. 1988. Ecological consequences of prairie dog disturbances. BioScience 38: 778–785.
White P. S. 1979. Pattern, process and natural disturbance in vegetation. Bot. Rev. 45: 229–299.
Whittaker R. H. & Levin S. A. 1977. The role of mosaic phenomena in natural communities. Theoret. Pop. Biol. 12: 117–139.
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Collins, S.L. Experimental analysis of patch dynamics and community heterogeneity in tallgrass prairie. Vegetatio 85, 57–66 (1989). https://doi.org/10.1007/BF00042255
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DOI: https://doi.org/10.1007/BF00042255