Plant Ecology

, Volume 145, Issue 1, pp 27–36 | Cite as

Short-term patterns in water and nitrogen acquisition by two desert shrubs following a simulated summer rain

  • H. BassiriRad
  • D.C. Tremmel
  • R.A. Virginia
  • J.F. Reynolds
  • A.G. de Soyza
  • M.H. Brunell
Article

Abstract

A field experiment was conducted at the Jornada Long-Term Ecological Research (LTER) site in the Chihuahuan Desert of New Mexico to compare the rapidity with which the shrubs Larrea tridentata and Prosopis glandulosa utilized water, CO2 and nitrogen (N) following a simulated summer rainfall event. Selected plants growing in a roughly 50-m2 area were assigned to treatment and control groups. Treatment plants received the equivalent of 3 cm of rain, while no supplemental water was added to the control plants. Xylem water potential (Ψx) and net assimilation rate (Anet) were evaluated one day before and one and three days after watering. To monitor short-term N uptake, soils around each plant were labeled with eight equally distant patches of enriched 15N before watering. Each tracer patch contained 20 ml of 20 mM 15 NH415NO3 (99 atom%) solution applied to the soil at 20 cm from the center of the plant at soil depths of 10 and 20 cm. Nitrogen uptake, measured as leaf δ15N, was evaluated at smaller time intervals and for a longer period than those used for Ψx and Anet. Both Anet and Ψx exhibited a significant recovery in watered vs. control Larrea plants within 3 days after the imposition of treatment, but no such recovery was observed in Prosopis in that period. Larrea also exhibited a greater capacity for N uptake following the rain. Leaf δ15N was five-fold greater in watered compared to unwatered Larrea plants within 2 days after watering, while foliar δ15N was not significantly different between the watered and unwatered Prosopis plants during the same period. Lack of a significant change in root 15 NO3 uptake kinetics of Larrea, even three days after watering, indicated that the response of Larrea to a wetting pulse may have been due to a greater capacity to produce new roots. The differential ability of these potential competitors in rapidly acquiring pulses of improved soil resources following individual summer rainfall events may have significant implications for the dynamic nature of resource use in desert ecosystems.

δ15Desert shrubs Nitrogen uptake Rain Rapid response Water uptake 

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References

  1. BassiriRad, H. & Caldwell, M. M. 1992a. Root growth, osmotic adjustment and NO_3 uptake during and after a period of drought in Artemisia tridentata. Aust. J. Plant Physiol. 19: 493–500.Google Scholar
  2. BassiriRad, H. & Caldwell, M. M. 1992b. Temporal changes in root growth and 15N uptake and water relations of two tussock grass species recovering from water stress. Physiol. Plant 86: 525–531.Google Scholar
  3. BassiriRad, H., Caldwell, M. M. & Bilbrough, C. 1993. Effects of soil temperature and nitrogen status on kinetics of 15NO_3 uptake by roots of field-grown Agropyron desertorum (Fisch. ex Link) Schult. New Phytol. 123: 485–489.Google Scholar
  4. Becana, M. & Sprent, J. I. 1987. Nitrogen fixation and nitrate reduction in the root nodules of legumes. Physiol. Plant. 70: 757–765.Google Scholar
  5. Birch, H. F. 1960. Nitrification in soils after different periods of dryness. Plant & Soil. 10: 9–31.Google Scholar
  6. Brady, D. J., Wenzel, C. L., Fillery, I. R. P. & Gregory, P. J. 1995. Root growth and Nitrate uptake by wheat (Triticum aestivium L.) following wetting of dry surface soil. J. Exp. Bot. 46(286): 557–564.Google Scholar
  7. Branson, F. A., Miller, R. F. & McQueen, I. S. 1976. Moisture relationships in twelve northern desert shrub communities near Grand Junction, Colorado. Ecology 57: 1104–1124.Google Scholar
  8. Brown, J. R. & Archer, S. 1990. Water relations of a perennial grass and seedling Vs. adult woody plants in a subtropical savanna, Texas. Oikos 57: 366–374.Google Scholar
  9. Buffington, L. C. & Herbel, C. H. 1965. Vegetation changes on a semidesert grassland range from 1958 to 1963. Ecol. Monogr. 35: 139–164.Google Scholar
  10. Cabrera, M. L. 1993. Modeling the flush of nitrogen mineralization caused by drying and rewetting soils. Soil Sci. Soc. Am. J. 57: 63–66.Google Scholar
  11. Caldwell, M. M., Manwaring, J. H. & Durham, S. L. 1991. The microscale distribution of neighboring plant root in fertile soil microsites. Funct. Ecol. 5: 765–772.Google Scholar
  12. Conley, W., Conley, M. R. & Karl, T. R. 1992. A computational study of episodic events and historical context in longterm ecological processes: climate and grazing in the northern Chihuahuan Desert. Coenoses 7(1): 55–60.Google Scholar
  13. Cui, M. & Caldwell, M. M. 1997. A large ephemeral release of nitrogen upon wetting of dry soil and corresponding root responses in the field. Plant & Soil 191: 291–299.Google Scholar
  14. Cunningham, G. L., Syvertsen, J. P., Reynolds, J. F. & Willson, J. M. 1979. Some effects of soil moisture availability on above ground production and reproductive allocation in Larrea tridantata (DC) Cov. Oecologia 40: 113–123.Google Scholar
  15. Davidson, E. A., Stark, J. M. & Firestone M. K. 1990. Microbial production and consumption of nitrate in an annual grassland. Ecology 71: 1968–1975.Google Scholar
  16. Davis, S. D. & Mooney, H. A. 1985. Comparative water relations of adjacent California shrub and grassland communities. Oecologia 66: 522–529.Google Scholar
  17. Donavan, L. A. & Ehleringer, J. R. 1994. Water stress and use of summer precipitation in Great Basin shrub community. Funct. Ecol. 8: 289–297.Google Scholar
  18. Ehleringer, J. R., Phillips, S. L., Schuster, W. S. F. & Sandquist, D. R. 1991. Differential utilization of summer rains by desert plants. Oecologia 88: 430–434.Google Scholar
  19. Epstein, E. 1972. Mineral Nutrition of Plants: Principles and Perspective.John Wiley and Sons, New York. 104 p.Google Scholar
  20. Fernandez, O. A. & Caldwell, M. M. 1975. Phenology and dynamics of root growth of three cool semi-desert shrubs under field conditions. J. Ecol. 63: 703–714.Google Scholar
  21. Franco, A. C., de Soyza, A. G., Virginia, R. A., Reynolds, J. F. & Whitford, W. G. 1994. Effects of plant size and water relations on gas exchange and growth of the desert shrub Larrea tridentata. Oecologia 97: 171–178.Google Scholar
  22. Freckman, D. W. & Virginia, R. A. 1989. Plant-feeding nematodes in deep-rooting desert ecosystems. Ecology 70(6): 1665–1678.Google Scholar
  23. Gibbens, R. P. & Beck, R. F. 1988. Changes in grass basal area and forb densities over a 64-year period on grassland types of the Jornada Experimental Range. J. Range Mgt. 41: 186–192.Google Scholar
  24. Halvorson, W. L. & Patten, D. T. 1974. Seasonal water potential changes in Sonoran desert shrubs in relation to topography. Ecology 55: 173–177.Google Scholar
  25. Huang, B. & Nobel, P. S. 1992. Hydraulic conductivity and anatomy along lateral roots of cacti: changes with soil water status. New Phytol. 123: 499–507.Google Scholar
  26. Hunt, E. R. Jr., Zakir, N. J. D. & Nobel, P. S. 1987. Water cost and water revenues for established and rain-induced roots of Agave deserti. Funct. Ecol. 1: 125–129.Google Scholar
  27. Jackson, R. B. & Caldwell, M. M. 1989. The timing and degree of root proliferation in fertile-soil microsites for three cold-desert perennials. Oecologia 81: 149–153.Google Scholar
  28. Jenkins, M. B., Virginia, R. A. & Jarrel, W. M. 1988. Depth distribution and seasonal fluctuation of mesquite rhizobia in warm desert ecosystems. Soil Sci. Soc. Am. J. 52: 1644–1650.Google Scholar
  29. Kemp, P. R., Cornelius, J. M. & Reynolds, J. F. 1992. A simple model for predicting soil temperature in desert ecosystems. Soil Sci. 153: 280–287.Google Scholar
  30. Lajtha, K. & Schlesinger, W. H. 1986. Plant response to variations in nitrogen availability in a desert shrubland community. Biogeochem. 2: 29–37.Google Scholar
  31. Lauenroth, W. K., Sala, O. E., Milchunas, D. G. & Lathrop, R.W. 1987. Root dynamics of Bouteloua gracilis during short-term recovery from drought. Funct. Ecol. 1: 117–124.Google Scholar
  32. Lin, G., Phillips, S. L. & Ehleringer, J. R. 1996. Monsoonal precipitation responses of shrubs in a cold desert community on the Colorado Plateau. Oecologia 106:8–17.Google Scholar
  33. Mariotti, A. 1984. Atmospheric nitrogen is a reliable standard for natural 15N abundance measurements. Nature 311: 251–252.Google Scholar
  34. Mitchell, J. B. F, Manabe, S. Meleshko, V. & Tokioka, T. 1990. Equilibrium climate change and its implications for the future. In: Houghton, J. T., Jenkins, G. J. & Ephraums, J. J. (eds): The IPCC scientific assessment. Cambridge Univ. Press, Cambridge, England.Google Scholar
  35. Nash, M. H. & Dougherty, L. A. 1990. Soil-landscape relationships in alluvium sediments in southern New Mexico. New Mexico State Agricul. Exper. Stat. Bull. No. 746.Google Scholar
  36. Nobel, P. S. 1988. Environmental biology of Agaves and cacti. pp. 66–93. Cambridge University Press, Cambridge.Google Scholar
  37. Nobel, P. S. & Huang, B. 1992. Hydraulic and structural changes for lateral of two desert succulents in response to soil drying and rewetting. Int. J. Pl. Sci. 153: S163–S170.Google Scholar
  38. Nobel, P. S. & Sanderson, J. 1984. Rectifier-like activities of roots of two desert succulents. J. Exp. Bot. 35: 727–737.Google Scholar
  39. North, G. B. & Nobel, P. S. 1994. Changes in root hydraulic conductivity for two tropical epiphytic cacti as soil moisture varies. Am. J. Bot. 81: 46–53.Google Scholar
  40. Noy-Meir, I. 1973. Desert ecosystems: Environment and procedure. Ann. Rev. Sys. 4: 25–52.Google Scholar
  41. Reynolds, J. F., Virginia, R. A. & Schlesinger, W. H. 1997. Defining functional types for models of desertification. Pages 194–214 in M. Smith, H. H. Shugart and F. I. Woodward, editors. Functional Types. Cambridge University Press, CambridgeGoogle Scholar
  42. Sala, O. E. & Lauenroth, W. K. 1982. Small rainfall events: an ecological role in semiarid regions. Oecologia 53: 301–304.Google Scholar
  43. Sala, O. E., Lauenroth, W. K. & Parton, W. J. 1982. Plant recovery following prolonged drought in a shortgrass steppe. Agric. Meteor. 27: 49–58.Google Scholar
  44. Shearer, G., Kohl, D. H., Virginia, R. A., Bryan, B. A., Skeeters, J. L., Nilsen, E. T., Sharifi, M. R. & Rundel, P. W. 1983. Estimates of N2-fixation from variation in the natural abundance of 15N in Sonoran desert ecosystems. Oecologia 56: 365–373.Google Scholar
  45. Schlesinger, W. H., Fonteyn, P. J. & Marion, G. M. 1987. Soil moisture and plant transpiration in the Chihuhuan desert of New Mexico. J. Arid. Environ. 12: 119–126.Google Scholar
  46. Shone, M. G. T. & Flood, A. V. 1983. Effects of periods of localized water stress on subsequent nutrient uptake by barley roots and their adaptation by osmotic adjustment. New Phytol. 94: 561–572.Google Scholar
  47. Sokal, R. & Rohlf, F. J. 1981. Biometry. W. H. Freeman, New York, NY, USA.Google Scholar
  48. Streeter, J. G. 1985. Nitrate inhibition of legume nodule growth and activity. II. Short term studies with high nitrate supply. Plant Physiol. 77: 325–328.Google Scholar
  49. Syvertsen, J. P., Cunnigham, G. L. & Feather, T. V. 1975. Anamalous diurnal patterns of xylem water potential in Larrea tridentata. Ecology 56: 1423–1428.Google Scholar

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • H. BassiriRad
    • 1
  • D.C. Tremmel
    • 2
  • R.A. Virginia
    • 3
  • J.F. Reynolds
    • 2
  • A.G. de Soyza
    • 4
  • M.H. Brunell
    • 1
  1. 1.Department of Biological SciencesUniversity of Illinois at ChicagoUSA
  2. 2.Department of BotanyDuke UniversityDurhamUSA
  3. 3.Environmental Studies ProgramDartmouth CollegeHanoverUSA
  4. 4.Environmental Research and Wildlife Development AgencyAbu DhabiUAE

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