Grassland Ecology

Reference work entry
Part of the The Plant Sciences book series (PLANTSCI, volume 8)

Abstract

  • Grasslands are one of Earth’s major biomes and the native vegetation of up to 40 % of Earth’s terrestrial surface. Grasslands occur on every continent except Antarctica, are ecologically and economically important, and provide critical ecosystem goods and services at local, regional, and global scales.

  • Grasslands are surprisingly diverse and difficult to define. Although grasses and other grasslike plants are the dominant vegetation in all grasslands, grasslands also include a diverse assemblage of other plant life forms that contribute to their species richness and diversity. Many grasslands also support a diverse animal community, including some of the most species-rich grazing food webs on the planet.

  • Grasslands allocate a large proportion of their biomass below ground, resulting in large root to shoot ratios. This pattern of biomass allocation coupled with slow decomposition and weathering rates leads to significant accumulations of soil organic matter and often highly fertile soils.

  • Climate, fire, and grazing are three important drivers that affect the composition, structure, and functioning of grasslands. In addition to the independent effects of these factors, there are many interactions among grazing, fire, and climate that affect ecological patterns and processes in grasslands in ways that may differ from the independent effects of each driver alone.

  • Grasslands occur under a broad range of climatic conditions, though water is generally limiting for some part of the year in most grasslands. Many grasslands experience periodic droughts and a dormant season based on seasonal dry or cold conditions.

  • Grasslands are sensitive to climate variability and climate changes. There are well-documented shifts in the distribution of North American grasslands in response to past droughts, and both observational data and experiments suggest that grasslands will be affected by future changes in rainfall and temperature.

  • Fire is a common occurrence, particularly in more mesic grasslands, due to the large accumulations of dry, highly combustible fine fuel in the form of dead plant material. Fire affects virtually all ecological processes in grasslands, from the physiology of individual plants to the landscape-level patterns, though the effects of fire vary with grassland productivity and the accumulation of detritus.

  • All grasslands are grazed or have experienced grazing as a selective force at some point in their evolutionary history. The ecological effects of grazing vary with climate and plant productivity, and the associated evolutionary history of grazers in different grasslands.

  • Grasslands have been heavily exploited by humans, and many temperate grasslands are now among the most threatened ecosystems globally. Widespread cultivation of grasslands was the major land-use change that impacted grasslands historically, while multiple global changes drivers (i.e., altered fire and grazing regimes, woody plant encroachment, elevated CO2, invasive species, fragmentation) contribute to the contemporary loss of grasslands.

  • Grassland restoration aims to recover the diversity and ecosystem services that grasslands provide. While restored grasslands may attain productivity comparable to native grasslands and sequester carbon for extended periods, they typically support much less diversity than comparable native grasslands. Recovery of soil communities and properties is often very slow.

Keywords

Biomass Burning Assimilation Photosynthesis Cretaceous 

References

  1. Anderson RC. The historic role of fire in the North American grassland. In: Collins SL, Wallace LL, editors. Fire in North American tallgrass prairies. Norman: University of Oklahoma Press; 1990.Google Scholar
  2. Archibold OW. Ecology of world vegetation. London/New York: Chapman and Hall; 1995.CrossRefGoogle Scholar
  3. Baer SG, Blair JM, Knapp AK, Collins SL. Soil resources regulate productivity and diversity in newly established tallgrass prairie. Ecology. 2003;84:724–35.CrossRefGoogle Scholar
  4. Baer SG, Collins SL, Blair JM, Fiedler A, Knapp AK. Soil heterogeneity effects on tallgrass prairie community heterogeneity: an application of ecological theory to restoration ecology. Restor Ecol. 2005;13:413–24.CrossRefGoogle Scholar
  5. Benson E, Hartnett DC. The role of seed and vegetative reproduction in plant recruitment and demography in tallgrass prairie. Plant Ecol. 2006;187:163–77.CrossRefGoogle Scholar
  6. Blair JM, Seastedt TR, Rice CW, Ramundo RA. Terrestrial nutrient cycling in tallgrass prairie. In: Knapp AK, Briggs JM, Hartnett DC, Collins SL, editors. Grassland dynamics: long-term ecological research in tallgrass prairie. New York: Oxford University Press; 1998.Google Scholar
  7. Blecker SW, McCulley RL, Chadwick OA, Kelly EF. Biologic cycling of silica across a grassland bioclimosequence. Global Biogeochem Cycles. 2006;20, GB3023. doi:10.1029/2006GB002690.CrossRefGoogle Scholar
  8. Briggs JM, Knapp AK, Blair JM, Heisler JL, Hoch GA, Lett MS, McCarron JK. An ecosystem in transition: causes and consequences of the conversion of mesic grassland to shrubland. BioScience. 2005;55:243–54.CrossRefGoogle Scholar
  9. Collins SL, Knapp AK, Briggs JM, Blair JM, Steinauer E. Modulation of diversity by grazing and mowing in native tallgrass prairie. Science. 1998;280:745–7.PubMedCrossRefGoogle Scholar
  10. Dalgleish HJ, Hartnett DC. The effects of fire frequency and grazing on tallgrass prairie productivity and plant composition are mediated through bud bank demography. Plant Ecol. 2009;201:411–20.CrossRefGoogle Scholar
  11. Fargione JE, Hill J, Tilman D, Polasky S, Hawthorne P. Land clearing and the biofuel carbon debt. Science. 2008;319:1235–8.PubMedCrossRefGoogle Scholar
  12. Frank DA. Drought effects on above and below ground production of a grazed temperate grassland ecosystem. Oecologia. 2007;152:131–9.PubMedCrossRefGoogle Scholar
  13. Fuhlendorf SD, Engle DM. Restoring heterogeneity on rangelands: ecosystem management based on evolutionary grazing patterns. BioScience. 2011;51:625–32.CrossRefGoogle Scholar
  14. Hoekstra JM, Boucher TM, Ricketts TH, Roberts C. Confronting a biome crisis: global disparities of habitat loss and protection. Ecol Lett. 2005;8:23–9.CrossRefGoogle Scholar
  15. Knapp AK, Seastedt TR. Detritus accumulation limits productivity of tallgrass prairie. BioScience. 1986;36:662–8.CrossRefGoogle Scholar
  16. Knapp AK, Blair JM, Briggs JM, Collins SL, Hartnett DC, Johnson LC, Towne EG. The keystone role of bison in North American tallgrass prairie. BioScience. 1999;49:39–50.CrossRefGoogle Scholar
  17. Lauenroth WK, Burke IC, Gutmann MP. The structure and function of ecosystems in the central North American grassland region. Great Plains Research 1999;9:223–59.Google Scholar
  18. McNaughton SJ. Ecology of a grazing ecosystem: the Serengeti. Ecol Monogr. 1985;55:259–94.CrossRefGoogle Scholar
  19. Milchunas DG, Sala OE, Lauenroth WK. A generalized model of the effects of grazing by large herbivores on grassland community structure. Am Nat. 1988;132:87–106.CrossRefGoogle Scholar
  20. Nippert JB, Knapp AK. Linking water uptake with rooting patterns in grassland species. Oecologia. 2007;153:261–72.PubMedCrossRefGoogle Scholar
  21. Nippert JB, Knapp AK, Briggs JM. Intra-annual rainfall variability and grassland productivity: can the past predict the future. Plant Ecol. 2006;184:65–74.CrossRefGoogle Scholar
  22. Nippert JB, Wieme RA, Ocheltree TW, Craine JM. Root characteristics of C4 grasses limit reliance on deep soil water in tallgrass prairie. Plant and Soil. 2012;355:385–94.CrossRefGoogle Scholar
  23. Prasad V, Stromberg CA, Alimohammadian H, Sahni A. Dinosaur coprolites and the early evolution of grasses and grazers. Science. 2005;310:1177–90.PubMedCrossRefGoogle Scholar
  24. Seastedt TR. Soil systems and nutrient cycles of the North American prairie. In: Joern A, Keeler KK, editors. The changing prairie. New York: Oxford University Press; 1995.Google Scholar
  25. Silvertown J, Poulton P, Johnston E, Edwards G, Heard M, Biss PM. The park grass experiment 1856-2006: its contribution to ecology. J Ecol. 2006;94:801–14.CrossRefGoogle Scholar
  26. Strömberg CAE. Evolution of grasses and grassland ecosystems. Annu Rev Earth Planet Sci. 2011;39:517–44.CrossRefGoogle Scholar
  27. Walter H. Ecology of tropical and subtropical vegetation. Edinburgh: Oliver & Boyd; 1971.Google Scholar
  28. Weaver JE. Recovery of midwestern prairies from drought. Proc Am Philos Soc. 1944;88:125–31.Google Scholar
  29. Weaver JE. Prairie plants and their environment: a fifty-year study in the Midwest. Lincoln: University of Nebraska Press; 1968.Google Scholar
  30. Weaver JE, Albertson FW. Major changes in grassland as a result of continued drought. Bot Gaz. 1939;100:576–91.CrossRefGoogle Scholar
  31. Weaver JE, Fitzpatrick TJ. The prairie. Ecol Monogr. 1934;4:109–295.CrossRefGoogle Scholar
  32. White R, Murray S, Rohweder M. Pilot analysis of global ecosystems (PAGE): grassland ecosystems. Washington, DC: World Resources Institute (WRI); 2000.Google Scholar

Further Reading

  1. Axelrod DI. Rise of the grassland biome, Central North America. Bot Rev. 1985;51:163–201.CrossRefGoogle Scholar
  2. Beerling DJ, Osborne CP. The origin of the savanna biome. Glob Chang Biol. 2006;12:2023–31.CrossRefGoogle Scholar
  3. Borchert JR. The climate of the central North American grassland. Ann Assoc Am Geogr. 1950;40:1–39.CrossRefGoogle Scholar
  4. Collins SL, Wallace LL, editors. Fire in North American tallgrass prairies. Norman: University of Oklahoma Press; 1990.Google Scholar
  5. French N, editor. Perspectives in grassland ecology. Results and applications of the United States international biosphere programme grassland biome study. New York: Springer; 1979.Google Scholar
  6. Gibson DJ. Grasses and grassland ecology. New York: Oxford University Press; 2009.Google Scholar
  7. Havstad KM, editor. Structure and function of a Chihuahuan desert ecosystem: the jornada basin long-term ecological research site. New York: Oxford University Press; 2006.Google Scholar
  8. Knapp AK, Briggs JM, Hartnett DC, Collins SL, editors. Grassland dynamics: long-term ecological research in tallgrass prairie. New York: Oxford University Press; 1998.Google Scholar
  9. Lauenroth WK, Burke IC, editors. Ecology of the shortgrass steppe: a long-term perspective. New York: Oxford University Press; 2008.Google Scholar
  10. McClaran MP, Van Devender TR. The desert grassland. Tucson: University of Arizona Press; 1997.Google Scholar
  11. Oesterheld M, Loreti J, Semmartin M, Paruelo JM. Grazing, fire, and climate effects on primary productivity of grasslands and savannas. Ecosyst World ISSU. 1999;16:287–306.Google Scholar
  12. Osborne CP. Atmosphere, ecology and evolution: what drove the Miocene expansion of the C4 grasslands? J Ecol. 2008;96:35–45.PubMedPubMedCentralGoogle Scholar
  13. Risser PG, Birney EC, Blocker HD, May SW, Parton WJ, Weins JA. The true prairie ecosystem. Stroudsburg: Hutchinson Ross; 1981.Google Scholar
  14. Sala OE, Parton WJ, Joyce LA, Lauenroth WK. Primary production of the central grassland region of the United States. Ecology. 1988;69:40–5.CrossRefGoogle Scholar
  15. Samson F, Knopf F. Prairie conservation in North America. BioScience. 1994;44:418–21.CrossRefGoogle Scholar
  16. Weaver JE. North American prairie. Lincoln: Johnsen Publishing; 1954.Google Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Division of BiologyKansas State UniversityManhattanUSA

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