Biogeochemistry

, Volume 2, Issue 1, pp 29–37 | Cite as

Plant response to variations in nitrogen availability in a desert shrubland community

  • Kate Lajtha
  • William H. Schlesinger
Article

Abstract

Spatial variations in nitrogen availability were studied in a desert community codominated byLarrea tridentata (DC.) Cov. andProsopis glandulosa Torr. Measurements of natural δ15N values in tissues suggested thatProsopis obtains approximately half of its nitrogen through direct symbiotic fixation. Soils were collected under 1)Prosopis shrubs, 2)Larrea shrubs ⩽ 2 m fromProsopis (LP), and 3)Larrea ⩽ 2 m from otherLarrea but> 5 m from the nearestProsopis (LL).Prosopis soils showed significantly higher rates of nitrogen mineralization than LL soils in both A and B horizons. Rates of mineralization in LP soils were significantly higher than rates in LL soils only in the B horizon and were not significantly different from rates inProsopis soils. Leaf nitrogen concentrations were significantly higher in LP shrubs (2.06%) than in LL shrubs (1.78%), although δ15N values did not differ between the two shrub types. Nitrogen concentrations inPerezia nana Gray, a perennial herb, were greater in plants underProsopis shrubs (2.09%) than under LP shrubs (1.93%) or LL shrubs (1.67%). Despite apparent differences in nitrogen availability, biomass ofLarrea and density ofPerezia did not differ significantly among these sites.

Key words

nitrogen availability nitrogen mineralization desert shrublands nitrogen stable isotopes 

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References

  1. Barth RC, Klemmedson JO (1978) Shrub-induced spatial patterns of dry matter, nitrogen, and organic carbon. Soil Science Society of America Journal 42: 804–809.Google Scholar
  2. Binkley D, Sollins P, McGill WB (1985) Natural abundance of nitrogen-15 as a tool for tracing alder-fixed nitrogen. Soil Science Society of America Journal 49: 444–447.Google Scholar
  3. Blackmer AM, Bremner JM (1977) Nitrogen isotope discrimination in denitrification of nitrate in soils. Soil Biology and Biochemistry 9: 73–77.Google Scholar
  4. Charley JL, West NE (1975) Plant-induced soil chemical patterns in some shrub-dominated semi-desert ecosystems of Utah. Journal of Ecology 63: 945–964.Google Scholar
  5. Charley JL, West NE (1977) Micro-patterns of nitrogen mineralization activity in soils of some shrub-dominated semi-desert ecosystems of Utah. Soil Biology and Biochemistry 9: 357–365.Google Scholar
  6. Delwiche CC, Steyn PL (1970) Nitrogen isotope fractionation in soils and microbial reactions. Environment Science and Technology 4: 927–935.Google Scholar
  7. Ettershank G, Ettershank J, Bryan M, Whitford WG (1978) Effects of nitrogen fertilization on primary production in a Chihuahuan Desert ecosystem. Journal of Arid Environments 1: 135–139.Google Scholar
  8. Fonteyn PH, Schlesinger WH, Marion GM, in prep. Fine-root production in a calcareous Aridisol of the Chihuahuan Desert of New Mexico.Google Scholar
  9. Gile LH, Hawley JW, Grossman RB (1981) Soils and geomorphology in the Basin and Range area of southern New Mexico — Guidebook to the Desert Project. Memoir 39, New Mexico Bureau of Mines & Mineral Resources, Socorro, NM, pp. 222.Google Scholar
  10. Klemmedson JO, Barth RC (1975) Distribution and balance of biomass and nutrients in desert shrub ecosystems. US/IBP Desert Biome Res Memo 75–7, Utah State University, Logan, UT, pp. 18.Google Scholar
  11. Lowther JR (1980) Use of a single sulfuric acid-hydrogen peroxide digest for the analysis ofPinus radiata needles. Communications in Soil Science and Plant Analysis 11: 175–188.Google Scholar
  12. Ludwig JA, Reynolds JF, Whitson PD (1975) Size-biomass relationships of several Chihuahuan Desert shrubs. American Midland Naturalist 94: 451–461.Google Scholar
  13. Melillo JM (1985) How are nitrogen and carbon dynamics linked during the transformation of fresh plant litter to metastable humic compounds and how do the linkages affect nitrogen availability? Bulletin of the Ecological Society of America 66: 231 (Abstract).Google Scholar
  14. Melillo JM, Aber JD, Muratore JF (1982) Nitrogen and lignin control of hardwood leaf litter decomposition dynamics. Ecology 63: 621–626.Google Scholar
  15. Montes RA, Christensen NL (1979) Nitrification and succession in the piedmont of North Carolina. Forest Science 25: 287–297.Google Scholar
  16. Muller WH, Muller CH (1956) Association patterns involving desert plants that contain toxic products. American Journal of Botany 43: 354–361.Google Scholar
  17. Parker LW, Fowler HG, Ettershank G, Whitford WG (1982) The effects of subterranean termite removal on desert soil nitrogen and ephemeral flora. Journal of Arid Environments 5: 53–59.Google Scholar
  18. Powers RF (1980) Mineralizable soil nitrogen as an index of nitrogen availability to forest trees. Soil Science Society of America Journal 44: 1314–1320.Google Scholar
  19. Romney EM, Wallace A, Hunter RB (1978) Plant response to nitrogen fertilization in the northern Mohave Desert and its relationship to water manipulation. Pages 232–243. In NE West and J Skujins, editors. Nitrogen in Desert Ecosystems. Dowden Hutchinson & Ross Publishers, Stroudsburg, Pennsylvania.Google Scholar
  20. Schaefer D, Steinberger Y, Whitford WG (1985) The failure of nitrogen and lignin control of decomposition in a North American desert. Oecologia 65: 382–386.Google Scholar
  21. Shearer G, Kohl DH (1978)15N abundance in N-fixing and non-N-fixing plants. pp. 605–622. In A Frigerio, editor. Recent Developments in Biology and Medicine, Vol. 1. Plenum Press, New York.Google Scholar
  22. Shearer G, Kohl DH, Virginia RA, Bryan BA, Skeeters JL, Nilsen ET, Sharifi MR, Rundel PW (1983) Estimates of N2-fixation from variation in the natural abundances of15N in Sonoran Desert ecosystems. Oecologia 56: 365–373.Google Scholar
  23. Swift MJ, Heal OW, Anderson JM (1979) Decomposition in Terrestrial Ecosystems. University of California, Press, Berkeley, pp. 372.Google Scholar
  24. Technicon (1977a) Individual/simultaneous determination of nitrogen and/or phosphorus in BD acid digests. Industrial Method 329-74W/B. Technicon Industrial Systems, Tarrytown, NY.Google Scholar
  25. Technicon (1977b) Nitrate and nitrite in water and seawater. Industrial Method 158-71W1A. Technicon Industrial Systems, Tarrytown, NY.Google Scholar
  26. Technicon (1978) Ammonia in water and seawater. Industrial Method 154-71W/B. Technicon Industrial Systems, Tarrytown, NY.Google Scholar
  27. Tiedemann AR, Klemmedson JO (1973) Nutrient availability in desert grassland soils under mesquite (Prosopis juliflora) trees and adjacent open areas. Soil Science Society of America Proceedings 37: 107–110.Google Scholar
  28. Virginia RA, Jarrell WM (1983) Soil properties in a mesquite-dominated desert ecosystem. Soil Science Society of America Journal 47: 138–144.Google Scholar
  29. Waring RH, Cleary BD (1967) Plant moisture stress: Evaluation by pressure bomb. Science 155: 1248–1254.Google Scholar
  30. Went FW (1942) The dependence of certain annual plants on shrubs in southern California deserts. Bulletin of the Torrey Botanical Club 69: 100–114.Google Scholar

Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1986

Authors and Affiliations

  • Kate Lajtha
    • 1
  • William H. Schlesinger
    • 1
  1. 1.Department of BotanyDuke UniversityDurhamUSA

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