Soil resource heterogeneity in the Mojave Desert

Journal of Arid Environments

Volumn 52, Issue 3, 2002, Pages 269-292

  Titus, Jonathan H ^a,b,c   Nowak, Robert S ^b   Smith, Stanley D ^a  

^a UNIVERSITY OF NEVADA   (United States)

^b UNIVERSITY OF NEVADA   (United States)

^c Lamont Doherty Earth Observatory   (United States)

Author keywords

Fertile; Infiltration; Islands; Mojave Desert; Mycorrhizae; Shrubs; Soil nutrients; Soil texture

Indexed keywords

ARBUSCULAR MYCORRHIZA; BURROWING ORGANISM; DESERT; HETEROGENEITY; NUTRIENT AVAILABILITY; SOIL PROPERTY; SOIL-VEGETATION INTERACTION;

CALIFORNIA; MOJAVE DESERT; UNITED STATES;

AMBROSIA; AMBROSIA DUMOSA; BACTERIA (MICROORGANISMS); LARREA; LARREA TRIDENTATA; LYCIUM; LYCIUM PALLIDUM; MAMMALIA; PLEURAPHIS; PLEURAPHIS RIGIDA; TRIDENTATA;

EID: 0036857409     PISSN: 01401963     EISSN: None     Source Type: Journal    
DOI: 10.1006/jare.2002.1010     Document Type: Article

References (135)

1. Aguiar, M.R. & Sala, O.E. (1999). Patch structure, dynamics and implications for the functioning of arid ecosystems. Trends in Ecology and Evolution, 14: 273-277.
2. Al-Agely, A.K. & Reeves, F.B. (1995). Inland sand dune mycorrhizae: Effects of soil depth, moisture, and pH on colonization of Oryzopsis hymenoides. Mycologia, 87: 54-60.
3. Allen, E.B., Rincon, E., Allen, M.F., Perez-Jimenez, A. & Huante, P. (1998). Disturbance and seasonal dynamics of mycorrhizae in a tropical deciduous forest in Mexico. Biotropica, 30: 261-274.
4. Anderson, R.C., Liberta, A.E. & Dickman, L.A. (1984). Interactions of vascular plants and vesicular-arbuscular mycorrhizal fungi across a soil moisture-nutrient gradient. Oecologia, 64: 111-117.
5. Barth, R.C. & Klemmedson, J.O. (1978). Shrub-induced spatial patterns of dry matter, nitrogen, and organic carbon. Soil Science Society of America Journal, 42: 809.
6. Beatley, J.C. (1967). Survival of winter annuals in the northern Mojave Desert. Ecology, 48: 745-750.
7. Beatley, J.C. (1976). Vascular Plants of the Nevada Test Site and Central-southern Nevada, Ecological and Geographical Distributions. Springfield, VA: TID-26881, Energy Research and Development Administration, National Technical Information Service, U.S. Department. of Commerce.
8. Bedunah D.J. & Sosebee, R.E. (1986). Influence of mesquite control on soil erosion on a depleted range site. Journal of Soil and Water Conservation, 41: 131-135.
9. Bethlenfalvay, G.J., Dakessian, S. & Pacovsky, R.S. (1984). Mycorrhizae in a southern California desert, ecological implications. Canadian Journal of Botany, 62: 519-524.
10. Binet, P. (1981). Short-term dynamics of minerals in arid ecosystems. In: Goodall, D.W. & Perry, R.A. (Eds), Arid-Land Ecosystems, Structure, Functioning and Management, Vol. 2, pp. 325-356. New York: International Biological Programme 17, Cambridge University Press. 605 pp.
11. Blackburn, W.H. & Skau, C.M. (1974). Infiltration rates and sediment production of selected plant communities in Nevada. Journal of Range Management, 27: 476-480.
12. Blaszkowski, J. (1994). Arbuscular fungi and mycorrhizae (Glomales) of the Hel Peninsula, Poland. Mycorrhiza, 5: 71-88.
13. Bloss, H.E. (1985). Studies of the symbiotic microflora and their role in the ecology of desert plants. Desert Plants, 7: 119-127.
14. Bloss, H.E. & Walker, C. (1987). Some endogenous mycorrhizal fungi of the Santa Catalina mountains in Arizona. Mycologia, 79: 649-654.
15. Bowers, M.A. (1987). Precipitation and the relative abundances of desert winter annuals, a 6-year study in the northern Mojave Desert. Journal of Arid Environments, 12: 141-149.
16. Brisson, J. & Reynolds, J.F. (1994). The effect of neighbors on root distribution in a creosotebush (Larrea tridentata) population. Ecology, 75: 1693-1702.
17. Brooks, P.C., Powlson, D.S. & Jenkinson, D.S. (1985). The microbial biomass in the soil. In: Fitter, A.H. (Ed.), Ecological Interactions in Soil, pp. 123-126. Oxford: Blackwell Scientific Publications. 451 pp.
18. Brundrett, M. (1991). Mycorrhizas in natural ecosystems. Advances in Ecological Research, 21: 171-313.
19. Brundrett, M.C., Ashwath, N. & Jasper, D.A. (1996). Mycorrhizas in the Kakadu region of tropical Australia. Plant and Soil, 184: 159-171.
20. Brundrett, M.C., Melville, L. & Peterson, L. (1994). Practical Methods in Mycorrhiza Research. Guelph, Ontario: Mycologue Publications. 161 pp.
21. Caldwell, M.M. & Richards, J.H. (1989). Hydraulic lift, water efflux from upper roots improves effectiveness of water uptake by deep roots. Oecologia, 79: 1-5.
22. Carrillo-Garcia, A., Leon de la Luz, J.-L., Bashan, Y. & Bethlenfalvay, G.J. (1999). Nurse plants, mycorrhizae, and plant establishment in a disturbed area of the Sonoran Desert. Restoration Ecology, 7: 321-335.
23. Charley, J.L. & West, N.E. (1975). Plant-induced soil chemical patterns in some shrubdominated semi-desert ecosystems of Utah. Journal of Ecology, 63: 945-964.
24. Chew, R.M. & Whitford, W.G. (1992). A long-term positive effect of kangaroo rats (Dipodomys spectabilis) on creosotebushes (Larrea tridentata). Journal of Arid Environments, 22: 375-386.
25. Coppinger, K.D., Rieners, W.A., Burke, I.C. & Olson, R.K. (1991). Net erosion on a sage brush steppe landscape as determined by cesium-137 distribution. Soil Science Society of America Journal, 55: 254-258.
26. Cox, J.R., Schreiber, H.A. & Morton, H.L. (1983). The initial growth of two range grasses on nonfertilized and fertilized soils collected from creosotebush communities in the Southwestern United States. Journal of Range Management, 36: 726-729.
27. Crawford, C.S. & Gosz, J.R. (1982). Desert ecosystems, their resources in space and time. Environmental Gonservation, 9: 181-195.
28. Cross, A.F. & Schlesinger, W.H. (1999). Plant regulation of soil nutrient distribution in the northern Chihuahuan Desert. Plant Ecology, 145: 11-25.
29. Cui, M. & Nobel, P.S. (1992). Nutrient status, water uptake and gas exchange for three desert succulents infected with mycorrhizal fungi. New Phytologist, 122: 643-649.
30. Dhillion, S.S. (1999). Environmental heterogeneity, animal disturbances, microsite characteristics, and seedling establishment in a Quercus havardii community. Restoration Ecology, 7: 399-406.
31. Dunkerly, D. (2000). Hydrologic effects of dryland shrubs, defining the spatial extent of modified soil water uptake rates at an Australian desert site. Journal of Arid Environments, 45: 159-172.
32. Eldridge, D.J. & Robson, A.D. (1997). Bladeploughing and exclosure influence soil properties in a semi-arid Australian woodland. Journal of Range Management, 50:191-197.
33. El-Ghonemy, A.A., Wallace, A. & Romney, E.M. (1978). Nutrient concentrations in the natural vegetation of the Mojave Desert. Soil Science, 126: 219-229.
34. Elkins, N.G., Sabol, G.V., Ward, T.V. & Whitford, W.G. (1986). The influence of subterranean termites on the hydrological characteristics of a Chihuahuan Desert ecosystem. Oecologia, 68: 521-528.
35. Fisher, F.M., Zak, J.C., Cunningham, G.L. & Whitford, W.G. (1988). Water and nitrogen effects on growth and allocation patterns of creosote bush in the northern Chihuahuan Desert. Journal of Range Management, 41: 387-391.
36. Franco, A.C. & Nobel, P.S. (1989). Effect of nurse plants on the microhabitat and growth of cacti. Journal of Ecology, 77: 870-886.
37. Friese, C.F. & Koske, R.E. (1991). The spatial dispersion of spores of vesicular-arbuscular mycorrhizal fungi in a sand dune, microscale patterns associated with the root architecture of American beachgrass. Mycological Research, 8: 952-957.
38. Garcia-Moya, E. & McKell, C.M. (1970). Contribution of shrubs to the nitrogen economy of a desert-wash plant community. Ecology, 51: 81-88.
39. Garner, W. & Steinberger, Y. (1989). A proposed mechanism for the formation of'fertile islands' in the desert ecosystem. Journal of Arid Environments, 16: 257-262.
40. Gee, G.W. & Bauder, J.W. (1986). Particle-size analysis. In: Klute, A. (Ed.), Methods of Soil Analysis. Part 1. Physical and Mineralogical Methods (2nd Edn), pp. 383-411. Madison, WI: American Society of Agronomy, Inc. and Soil Science Society of America, Inc. 823 pp.
41. Gemma, J.N., Koske, R.E. & Carreiro, M. (1989). Seasonal dynamics of selected species of V-A mycorrhizal fungi in a sand dune. Mycological Research, 92: 317-321.
42. Gerdemann, J.W. & Nicolson, T.H. (1963). Spores of mycorrhizal Endogone species extracted from soil by wet sieving and decanting. Transactions of the British Mycological Society, 46: 235-244.
43. Gile, L.H., Gibbens, R.P. & Lenz, J.M. (1998). Soil induced variability in root systems of creosotebush (Larrea tridentata) and tarbush (Flourensia cernua). Journal of Arid Environments, 39: 57-78.
44. Guadarrama, P. & Alvarez-Sanchez, F.J. (1999). Abundance of arbuscular mycorrhizal spores in different environments in a tropical rainforest, Veracruz, Mexico. Mycorrhiza, 8: 267-270.
45. Hayman, D.S. (1970). Endogone spore numbers in soil and vesicular-arbuscular mycorrhiza in wheat as influenced by season and soil treatment. Transactions of the British Mycological Society, 54: 53-63.
46. Henkel, T.W., Smith, W.K. & Christensen, M. (1989). Infectivity and effectivity of indigenous vesicular-arbuscular mycorrhizal fungi from contiguous soils in southwestern Wyoming, USA. New Phytologist, 112: 205-214.
47. Herman, R.P., Provencio, K.R., Herrera-Matos, J. & Torrez, R.J. (1995). Resource islands predict the distribution of heterotrophic bacteria in Chihuahuan desert soils. Applied and Environmental Microbiology, 61: 1816-1821.
48. Hetrick, B.A.D. & Bloom, J. (1986). The influence of host plant on production and colonization ability of vesicular-arbuscular mycorrhizal spores. Mycologia, 78: 32-36.
49. Hickman, J.C. (Ed.). (1993). The Jepson Manual. Higher Plants of California. Berkeley, CA: University of California Press. 1400 pp.
50. Ho, I. (1987). Vesicular-arbuscular mycorrhizae of halophytic grasses in the Alvord Desert of Oregon. Northwest Science, 61: 148-151.
51. Holzapfel, C. & Mahall, B.E. (1999). Bi-directional facilitation and interference between shrubs and annuals in the Mojave Desert. Ecology, 80: 1747-1761.
52. Johnson, N.C. & McGraw, A. (1988). Vesicular-arbuscular mycorrhizae in taconite railings. I. Incidence and spread of Endogonaceous fungi following reclamation. Agriculture, Ecosystems and Environment, 21: 135-142.
53. Johnson, N.C., Pfleger, F.L., Crookston, R.K., Simmons, S.R. & Copeland, P.J. (1991a). Vesicular-arbuscular mycorrhizae respond to corn and soybean cropping history. New Phytologist, 117: 657-663.
54. Johnson, N.C., Zak, D.R., Tilman, D. & Pfleger, F.L. (1991 b). Dynamics of vesicular-arbuscular mycorrhizae during old field succession. Oecologia, 86: 349-358.
55. Johnson, N.C., Tilman, D. & Wedin, D. (1992). Plant and soil controls on mycorrhizal fungal communities. Ecology, 73: 2034-2042.
56. Jongman, R.H.G., ter Braak, C.J.F. & van Tongeren, O.F.R. (1987). Data Analysis in Community and Landscape Ecology. Wageningen, Netherlands: Cambridge University Press. 321 pp.
57. 2 enrichment (FACE) facility. Global Change Biology, 5: 659-668.
58. Kieft, T.L., White, C.S., Loftin, R., Aguilar, R., Craig, J.A. & Skaar, D.A. (1998). Temporal dynamics in soil carbon and nitrogen resources at a grassland-shrubland ecotone. Ecology, 79: 671-683.
59. Kummerow, J., Krause, D. & Jow, W. (1977). Root systems of chaparral shrubs. Oecologia, 29: 163-177.
60. Lajtha, K. & Schlesinger, W.H. (1986). Plant response to variations in nitrogen availability in a desert shrubland community. Biogeochemistry, 2: 29-37.
61. McAuliffe, J.R. (1988). Markovian dynamics of simple and complex desert plant communities. American Naturalist, 131: 459-490.
62. McAuliffe, J.R. (1994). Landscape evolution, soil formation, and ecological patterns and processes in Sonoran Desert bajadas. Ecological Monographs, 64: 111-148.
63. McGee, P.A. (1989). Variation in propagule numbers of vesicular-arbuscular mycorrhizal fungi in a semi-arid soil. Mycological Research, 92: 28-33.
64. Martensson, A.M. & Carlgren, K. (1994). Impact of phosphorus fertilization on VAM diasopres in two Swedish long-term field experiments. Agriculture, Ecosystems and Environment, 47: 327-334.
65. Martinez-Meza, E. & Whifford, W.G. (1996). Stemfiow, throughfall and channelization of stemflow by roots in three Chihuahuan desert shrubs. Journal of Arid Environments, 32: 271-287.
66. Maynard, D.G. & Kalra, Y.P. (1993). Nitrate and Exchangeable ammonium nitrogen. In: Carter, M. R. (Ed.), Soil Sampling and Methods of Analysis, pp. 25-38. Ann Arbor: Lewis Publishers. 823 pp.
67. Mejstrik, V.K. & Cudlin, P. (1983). Mycorrhiza in some plant desert species in Algeria. Plant and Soil, 71: 363-366.
68. Miller, R.O., Kotuby-Amacher, J. & Rodriguez, J.B. (1998). Western States Laboratory Proficiency Testing Program Soil and Plant Analytic Methods (Version 4.10). Logan, UT: WREP 125. 143 pp.
69. Moorhead, D.L., Fisher, F.M. & Whitford, W.G. (1988). Cover of spring annuals on nitrogen rich kangarro rat mounds in a Chihuahuan Desert grassland. American Midland Naturalist, 120: 443-447.
70. Moorman, T. & Reeves, F.B. (1979). The role of endomycorrhizae in revegetation practices in the semi-arid west. II. A bioassay to determine the effect of land disturbance on endomycorrhizal populations. American Journal of Botany, 66: 14-18.
71. Mun, H.T. & Whitford, W.G. (1989). Factors affecting annual plant assemblages on banner-tailed kangaroo rat mounds. Journal of Arid Environments, 18: 165-173.
72. Naeth, M.A., Rothwell, R.L., Chanasyk, D.S. & Bailey, A.W. (1990). Grazing impacts on infiltration in mixed prairie and rescue grasslands ecosystems of Alberta. Canadian Journal of Soil Science, 70: 593-605.
73. Navar, J. & Bryan, R.B. (1990). Interception loss and rainfall redistribution by three semi-arid growing shrubs in northeastern New Mexico. Journal of Hydrology, 115: 51-63.
74. Nulsen, R.A., Bligh, K.J, Baxter, I.N., Solin, E.J. & Imrie, D.H. (1986). The fate of rainfall in a mallee and heath vegetated catchment in southern Western Australia. Australian Journal of Ecology, 11: 361-371.
75. Ostler, W.K., Hansen, D.J. & Hall, D.B. (1999). The classification of shrublands on the Nevada Test Site. In: McArthur, E.D., Ostler, W. K. & Wambolt C.L. (Eds), Proceedings, Shrubland Ecotones; 1998 August 12-14, pp. 137-147. Ogden, UT: Proceedings RMRS-P-11, USDA, Forest Service, Rocky Mountain Research Station. 299 pp.
76. Quideau, S.A., Graham, R.C., Chadwick, O.A. & Wood, H.B. (1999). Biogeochemical cycling of calcium and magnesium by ceanothus and chamise. Soil Science Society of America Journal, 63: 1880-1888.
77. Parker, L.W., Fowler, H.G., Ettershank, G. & Whitford, W.G. (1982). The effects of subterranean termite removal on desert soil nitrogen and ephemeral flora. Journal of Arid Environments, 5: 53-59.
78. Parsons, A.J., Abrahams, A.D. & Simanton, J.R. (1992). Microtopography and soil-surface materials on semi-arid piedmont hillslopes, southern Arizona. Journal of Arid Environments, 22: 107-115.
79. Pond, E.C., Menge, J.A. & Jarrell, W.M. (1984). Improved growth of tomato in salanized soil by vesicular-arbuscular mycorrhizae collected from saline soils. Mycologia, 76: 74-84.
80. Pressland, A.J. (1976). Soil moisture redistribution as affected by throughfall and stemflow in an arid land shrub. Australian Journal of Botany, 24: 641-649.
81. Pugnaire, F.I., Haase, P. & Puigdefabregas, J. (1996). Facilitation between higher plant species in a semiarid environment. Ecology, 77: 1420-1426.
82. Requena, N., Jeffries, P. & Barea, J.M. (1996). Assessment of natural mycorrhizal potential in a desertified semiarid ecosystem. Applied and Environmental Microbiology, 62: 842-847.
83. Reichman, O.J. & Smith, S.C. (1985). Impact of pocket gopher burrows on overlying vegetation. Journal of Mammalogy, 66: 720-725.
84. Romney, E.M., Hale, V.Q., Wallace, A., Lunt, O.R., Childress, J.D., Kaaz, H., Alexander, G.V., Kinnear J.E. & Ackerman T.L. (1973). Some Characteristics of Soil and Perennial Vegetation in Northern Mojave Desert Areas of the Nevada Test Site, UCLA #12-916. Los Angeles, CA: University of California Los Angeles, School of Medicine.
85. Romney, E.M., Wallace, A., Kaaz, H. & Hale, V.Q. (1980). The role of shrubs on redistribution of mineral nutrients in soil in the Mojave Desert. Great Basin Naturalist Memoirs, 4: 124-133.
86. Rose, S.L. (1981). Vesicular-arbuscular endomycorrhizal associations of some desert plants of Baja California. Canadian Journal of Botany, 59: 1056-1060.
87. Rostagno, C.M. (1989). Infiltration and sediment production as affected by soil surface conditions in a shrubland of Patagonia, Argentina. Journal of Range Management, 42: 382-385.
88. Rostagno, C.M., del Valle, H.F. & Videla, L. (1991). The influence of shrubs on some chemical and physical properties of an acidic soil in north-eastern Patagonia, Argentina. Journal of Arid Environments, 20: 179-188.
89. Sanders, I.R. & Fitter, A.H. (1992). Evidence for differential responses between host-fungus combinations of vesicular-arbuscular mycorrhizas from a grassland. Mycological Research, 96: 415-419.
90. Scheltma, M.A., Abbott, L.K. & Robson, A.D. (1987). Seasonal variation in the infectivity of VA mycorrhizal fungi in annual pastures in a Mediterranean environment. Australian Journal of Agricultural Research, 38: 707-715.
91. Schlesinger, W.H., Raikes, J.A, Hartley, A.E. & Cross, A.F. (1996). On the spatial pattern of soil nutrients in desert ecosystems. Ecology, 77: 364-374.
92. Schlesinger, W.H., Reynolds, J.F., Cunningham, G.L., Huenneke, L.F., Jarrell, W.M., Virginia, R.A. & Whitford, W.G. (1990). Biological feedbacks in global desertification. Science, 247: 1043-1048.
93. Schwab, S. & Reeves, F.B. (1981). The role of endomycorrhizae in revegetation practices in the semi-arid west. III. Vertical distribution of vesicular-arbuscular (VA) mycorrhiza incoulum potential. American Journal of Botany, 68: 1293-1297.
94. Shmida, A. & Whittaker, R.H. (1981). Pattern and biological microsite effects in two shrub communities, southern California. Ecology, 62: 234-251.
95. Siguenza, C., Espejel, I. & Allen, E.B. (1996). Seasonality of mycorrhizae in coastal sand dunes of Baja California. Mycorrhiza, 6: 151-157.
96. Simard, R.R. (1993). Ammonium acetate-extractable elements. In: Carter, M. R. (Ed.), Soil Sampling and Methods of Analysis, pp. 39-42. Ann Arbor: Lewis Publishers. 823 pp.
97. Smilauer, P. (1993). CanoDraw 3.0. London: Environmental Change Research Centre, University College.
98. Smith, S.D., Monson, R.K. & Anderson, J.E. (1997). Physiological Ecology of North American Desert Plants. Berlin: Springer-Verlag. 286 pp.
99. Stahl, P.D. & Christensen, M. (1982). Mycorrhizal fungi associated with Bouteloua and Agropyron in Wyoming sagebrush grasslands. Mycologia, 74: 877-885.
100. Stutz, J.C. & Morton, J.B. (1996). Successive pot cultures reveal high species richness of arbuscular endomycorrhizal fungi in arid ecosystems. Canadian Journal of Botany, 74: 1883-1889.
101. Stutz, J.C., Copeman, R., Martin, C.A. & Morton, J.B. (1999). Patterns of species composition and distribution of arbuscular mycorrhizal fungi in arid regions of southwestern North America and Namibia, Africa. Canadian Journal of Botany, 78: 237-245.
102. Takar, A.A., Dobrowolski, J.P. & Thurow, T.L. (1990). Influence of grazing, vegetation life-form, soil type on infiltration ratres and inter-rill erosion on a Somali rangeland. Journal of Range Management, 43: 486-490.
103. ter Braak C.J.F. (1990). CANOCO - A FORTRAN Program for CANOnical Community Ordination by [Partial] [Detrended] [Canonical] Correspondence Analysis, Principal Components Analysis and Redundancy Analysis (Version 3.10). Ithaca: Microcomputer Power. 95 pp.
104. Thrash, I. (1997). Infiltration rate of soil around drinking troughs in the Kruger National Park, South Africa. Journal of Arid Environments, 35: 617-625.
105. Tiedemann, A.R. & Klemmedson, J.O. (1973a). Nutrient availability in desert grassland soils under mesquite (Prosopis juliflora) trees and adjacent open areas. Soil Science Society of America Proceedings, 37: 107-110.
106. Tiedemann, A.R. & Klemmedson, J.O. (1973b). Effect of mesquite on physical and chemical properties of the soil. Journal of Range Management, 26: 27-29.
107. Tiedemann, A.R. & Klemmedson, J.O. (1977). Effect of mesquite trees on vegetation and soils in the desert grassland. Journal of Range Management, 30: 361-367.
108. Tielborger, K. & Kadmon, R. (1997). Relationships between shrubs and annual communities in a sandy desert ecosystem, a three-year study. Plant Ecology, 130: 191-201.
109. Tielborger, K. & Kadmon, R. (2000). Temporal environmental variation tips the balance between facilitation and interference in desert plants. Ecology, 81: 1544-1583.
110. Titus, J.H., del Moral, R. & Gamiet, S. (1998). The distribution of vesicular-arbuscular mycorrhizae on Mount St. Helens, Washington. Madrono, 45: 162-170.
111. Titus, J.H., Titus, P.J., Nowak, R.S. & Smith, S.D. (2002). Arbuscular mycorrhizae of Mojave Desert plants. Western North American Naturalist (In Press).
112. Trappe, J.M. (1981). Mycorrhizae and productivity of arid and semi-arid rangelands. In: J.T. Manassah, & E.J. Briskey, (Eds), Advances in Food Producing Systems for Arid and Semi-arid Lands, pp. 5-25. Academic Press, New York. 897 pp.
113. Tromble, J.M., Renard, K.G. & Thatcher, A.P. (1974). Infiltration for three rangeland soil-vegetation complexes. Journal of Range Management, 27: 318-321.
114. Turner, F.B. & Randall, D.C. (1989). Net production by shrubs and winter annuals in Southern Nevada. Journal of Arid Environments, 17: 23-36.
115. Valiente-Banuet, A. & Ezcurra, E. (1991). Shade as a cause of the association between the cactus Neobuxbaumia tetetzo and the nurse plant Mimosa luisana in the Tehuacan Valley, Mexico. Journal of Ecology, 79: 961-971.
116. Vasek, F.C. & Lund, L.J. (1980). Soil characteristics associated with a primary plant succession on a Mojave Desert dry lakebed. Ecology, 61: 1013-1018.
117. Vilarino, A. & Arines, J. (1990). An instrumental modification of Gerdemann and Nicolson's method for extracting VAM fungal spores from soil samples. Plant and Soil, 121: 211-215.
118. Virginia, R.A. & Jarrell, W.M. (1983). Soil properties in a mesquite-dominated Sonoran Desert ecosystem. Soil Science Society of America Journal, 47: 138-144.
119. Virginia, R.A., Jenkins, M.B. & Jarrell, W.M. (1986). Depth of root symbiont occurrence in soil. Biology and Fertility and Soils, 2: 127-130.
120. Vorhies, C.T. & Taylor, W.P. (1922). Life history of the kangaroo rat, Dipodmys spectabilis spectabilis Merriami. U.S. Department of Agriculture, Bulletin No. 1091; pp. 1-39.
121. Wagner, D. (1997). The influence of ant nests on Acacia seed production, herbivory and soil nutrients. Journal of Ecology, 85: 83-93.
122. Walker, L.R, Thompson, D.B. & Landau, F.H. (2001). Experimental manipulations of fertile islands and nurse plant effects in the Mojave Desert, USA. Western North American Naturalist, 61, 25-35.
123. Wang, G.M., Stribley, D.P. & Tinker, P.B. (1985). Soil pH and vesicular-arbuscular mycorrhizas. In: Fitter, A.H. (Ed.), Ecological Interactions in Soil, pp. 219-224. Oxford: Blackwell Scientific Publications. 451 pp.
124. Wang, G.M., Stribley, D.P., Tinker, P.B. & Walker, C. (1993). Effects of pH on arbuscular mycorrhiza I. Field observations on the long-term liming experiments at Rothamsted and Woburn. New Phytologist, 124: 465-472.
125. West, N.E. (1991). Nutrient cycling in soils of semiarid and arid regions. In: Skujins, J. (Ed.), Semiarid Lands and Deserts, Soil Resources and Reclamation, pp. 295-332. New York: Marcel Dekker, Inc. 482 pp.
126. West, N.E. & Klemmedson, J.O. (1978). Structural distribution of nitrogen in desert ecosystems. In: West, N.E. & Skujins, J. (Eds.), Nitrogen in Desert Ecosystems, US/IBP Synthesis Series 9, pp. 1-16. Stroudsburg, PA: Dowden, Hutchinson and Ross. 307 pp.
127. Wezel, A., Rajot, J.-L. & Herbrig, C. (2000). Influence of shrubs on soil characteristics and their function in Sahelian agro-ecosystems in semi-arid Niger. Journal of Arid Environments, 44: 383-398.
128. White, J.A., Munn, L.C. & Williams, S.E. (1989). Edaphic and reclamation aspects of vesicular-arbuscular mycorrhizae in Wyoming red desert soils. Soil Science Society of America Journal, 53: 86-90.
129. Whitford, W.G. (1986). Pattern and Process in Desert Ecosystems. Albuquerque, NM: University of New Mexico Press. 139 pp.
130. Whitford, W.G., Anderson, J. & Rice, P.M. (1997). Stemflow contribution to the 'fertile island' effect in creosote bush, Larrea tridentata. Journal of Arid Environments, 35: 451-457.
131. Whifford, W.G. & Kay, F.R. (1999). Biopedturbation by mammals in deserts, a review. Journal of Arid Environments, 41: 203-230.
132. Wood, M.K. & Blackburn, W.H. (1981). Grazing systems, their influence on infiltration rates in the Rolling Plains of Texas. Journal of Range Management, 34: 331-335.
133. Wright, R.A. & Honea, J.H. (1986). Aspects of desertification in southern New Mexico, U.S.A., soil properties of a mesquite duneland and a former grassland. Journal of Arid Environments 11: 139-145.
134. Zak, J.C., Sinsabaugh, R. & MacKay, W.P. (1995). Windows of opportunity in desert ecosystems, their implications to fungal community development. Canadian Journal of Botany, 73(Suppl.): S1407-S1414.
135. Zar, J.H. (1984). Biostatistical Analysis (2nd Edn). Englewood Cliffs, NJ: Prentice-Hall, Inc. 718 pp.