Biogeochemistry

, Volume 53, Issue 2, pp 125–141 | Cite as

Spatial and temporal patterns of nitrogen concentrations in pristine and agriculturally-influenced prairie streams

  • Melody J. Kemp
  • Walter K. Dodds
Article

Abstract

Long-term data on nitrogen chemistry of streams draining Konza Prairie Biological Station (Konza), Kansas were analyzed to assess spatial and temporal patterns and examine the influence of agricultural activity on these patterns. Upland watersheds of Konza are predominantly tallgrass prairies, but agricultural fields and riparian forests border the lower reaches of the streams. We have up to 11 years of data in the relatively pristine upland reaches and 4 years of data on wells and downstream reaches influenced by fertilized croplands. Seasonal and spatial patterns in total nitrogen (TN) concentrations were driven largely by changes in the nitrate (NO3) concentrations. A gradient of increasing NO3 concentrations occurred from pristine upland stream reaches to the more agriculturally-influenced lowland reaches. Nitrate concentrations varied seasonally and were negatively correlated with discharge in areas influenced by row-crop agriculture (p = 0.007). The NO3 concentrations of stream water in lowland reaches were lowest during times of high precipitation, when the relative influence of groundwater drainage is minimal and water in the channel is primarily derived from upland prairie reaches. The groundwater from cropland increased stream NO3 concentrations about four-fold during low-discharge periods, even though significant riparian forest corridors existed along most of the lower stream channel. The minimum NO3 concentrations in the agriculturally influenced reaches were greater than at any time in prairie reaches. Analysis of data before and after introduction of bison to four prairie watersheds revealed a 35% increase of TN concentrations (p < 0.05) in the stream water channels after the introduction of bison. These data suggest that natural processes such as bison grazing, variable discharge, and localized input of groundwater lead to variation in NO3 concentrations less than 100-fold in prairie streams. Row-crop agriculture can increase NO3 concentrations well over 100-fold relative to pristine systems, and the influence of this land use process over space and time overrides natural processes.

ammonium groundwater nitrate nutrient cycling riparian buffer zones streams 

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References

  1. Ameel JJ, Axler RP & Owen CJ (1993) Persulfate digestion for determination of total nitrogen and phosphorus in low nutrient waters. Laboratory and Field Measurements 10: 8-11Google Scholar
  2. Cooper AB, Smith CM & Smithe MJ (1995) Effects of riparian set-aside on soil characteristics in an agricultural landscape: Implications for nutrient transport and retention. Agric. Ecosyst. and Environ. 55: 61-67Google Scholar
  3. Dodds WK, Blair JM, Henebry GM, Koelliker JK, Ramundo R & Tate CM (1996a) Nitrogen transport from tallgrass prairie watersheds. J. Environ. Qual. 25: 973-981Google Scholar
  4. Dodds WK, Hutson RE, Eichem AC, Evans MA, Gudder DA, Fritz KM & Gray L (1996b) The relationship of floods, drying, flow and light to primary production and producer biomass in a prairie stream. Hydrobiologia 333: 151-159Google Scholar
  5. Dodds WK (1997) Distribution of runoff and rivers related to vegetative characteristics, latitude, and slope: a global perspective. J.N. Am. Benthol. Soc. 16: 162-168Google Scholar
  6. Gray LJ & Dodds WK (1998) Structure and dynamics of aquatic communities. In: Knapp AK, Briggs JM, Hartnett DC & Collins SL (Eds) Grassland Dynamics (pp 177-192). Oxford University Press, New YorkGoogle Scholar
  7. Gray LJ, Macpherson GL, Koelliker JK & Dodds WK (1998) Hydrology and aquatic chemistry. In: Knapp AK, Briggs JM, Hartnett DC & Collins SL (Eds) Grassland Dynamics (pp 159-176). Oxford University Press, New YorkGoogle Scholar
  8. Griffiths RP, Entry JA, Ingham ER & Emmingham WH (1997) Chemistry and microbial activity of forest and pasture riparian-zone soils along three Pacific Northwest streams. Plant and Soil 190: 169-178Google Scholar
  9. Hill AR (1990) Ground water flow paths in relation to nitrogen chemistry in the near-stream zone. Hydrobiologia 206: 39-52Google Scholar
  10. Knapp AK, Blair JM, Briggs JM, Collins SL, Hartnett DC, Johnson LC & Towne EG (1999) The keystone role of bison in North American tallgrass prairie. BioScience 49: 39-50Google Scholar
  11. McArthur JV, Gurtz ME, Tate CM & Gilliam FS (1985) The interaction of biological and hydrological phenomena that mediate the qualities of water draining native tallgrass prairie on the Konza Prairie Research Natural Area. In: Perspective on non-point source pollution, Proceedings, 1985 National Conference, EPA 440/5-85-001, U.S. Environmental Protection Agency, Washington, DCGoogle Scholar
  12. Meyer JL, McDowell WH, Bott TL, Elwood JW, Ishizaki C, Melack JM, Peckarsky BL, Peterson BJ & Rublee PA (1988) Elemental dynamics in streams. J. N. Am. Benthol. Soc. 7: 410-432Google Scholar
  13. Muscutt AD, Harris GL, Bailey SW & Davies DB (1993) Buffer zones to improve water quality: A review of their potential use in UK agriculture. Agric. Ecosyst. and Environ. 45: 59-77Google Scholar
  14. Olness A, Rhoades ED, Smithe SJ & Menzel RG (1980) Fertilizer nutrient losses from rangeland watershed in central Oklahoma. J. Environ. Qual. 9: 81-86Google Scholar
  15. Omernik JM (1977) Nonpoint source-stream nutrient level relationships: a nationwide study. EPA-600013-77-105. U.S. Environmental Protection Agency, Corvallis, ORGoogle Scholar
  16. Oviatt CG (1998) Geomorphology of Konza Prairie. In: AK Knapp, JM Briggs, DC Hartnett & SL Collins (Eds) Grassland Dynamics (pp 35-47). Oxford University Press, New YorkGoogle Scholar
  17. Schlesinger WH (1997) Biogeochemistry: An Analysis of Global Change. Academic Press, San DiegoGoogle Scholar
  18. Tate CM (1990) Patterns and controls on nitrogen in tallgrass prairie streams. Ecology 71: 2007-2018Google Scholar
  19. Triska FJ, Kennedy VC, Avanzino RJ, Zellweger GW & Bencala KE (1989) Retention and transport of nutrients in a third-order stream: channel processes. Ecology 70: 1877-1892Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Melody J. Kemp
    • 1
  • Walter K. Dodds
    • 1
  1. 1.Division of BiologyKansas State UniversityManhattanUSA

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