Fleshy-fruited plants and frugivores in desert ecosystems

Seed Dispersal: Theory and its Application in a Changing World

Volumn , Issue , 2007, Pages 148-177

  Bronstein, Judith L ^a   Izhaki, Ido ^b   Nathan, Ran ^c   Tewksbury, Joshua J ^d   Spiegel, Orr ^c   Lotan, Alon ^b   Altstein, Ofir ^c  

^a University of Arizona   (United States)

^b UNIVERSITY OF HAIFA   (Israel)

^c HEBREW UNIVERSITY OF JERUSALEM   (Israel)

^d UNIVERSITY OF WASHINGTON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 34347262265     PISSN: None     EISSN: None     Source Type: Book    
DOI: None     Document Type: Chapter

References (166)

1. Aguiar, M.R. and Sala, O.E. (1999) Patch structure, dynamics and implications for the functioning of arid ecosystems. Trends in Ecology and Evolution 14, 273-277.
2. Aizen, M. (2003) Influences of animal pollination and seed dispersal on winter flowering in a temperate mistletoe. Ecology 84, 2613-2627.
3. Altstein, O. (2005) Seed dispersal of a fleshy fruited desert shrub by birds: effects of gut passage, disperser movement and local spatial structure on seed dispersion patterns. MSc thesis, Ben-Gurion University of the Negev, Beer Sheva, Israel.
4. Anava, A., Kam, M., Shkolnik, A. and Degen, A.A. (2000) Seasonal field metabolic rate and dietary intake in Arabian babblers (Turdoides squamiceps) inhabiting extreme deserts. Functional Ecology 14, 607-613.
5. Anderson, B.W. and Ohmart, R.D. (1978) Phainopepla utilization of honey mesquite forests in the Colorado River Valley. Condor 80, 334-338.
6. Aukema, J.E. (2004) Distribution and dispersal of desert mistletoe is scale-dependent, hierarchically nested. Ecography 27, 137-144.
7. Aukema, J.E. and Martinez del Rio, C. (2002) Where does a fruit-eating bird deposit mistletoe seeds? Seed deposition patterns and an experiment. Ecology 83, 3489-3496.
8. Bairlein, F. and Simons, D. (1995) Nutritional adaptations in migrating birds. Israel Journal of Zoology 41, 357-367.
9. Bates, J.M. (1992a) Frugivory on Bursera microphylla (Burseraceae) by wintering gray vireos (Vireo vicinior, Vireonidae) in the coastal deserts of Sonora, Mexico. Southwestern Naturalist 37, 252-258.
10. Bates, J.M. (1992b) Winter territorial behaviour of gray vireos. Wilson Bulletin 104, 425-433.
11. Beattie, A.J. (1985) The Evolutionary Ecology of Ant-Plant Mutualisms. Cambridge University Press, Cambridge, UK.
12. Berthold, P. (1976) The control and significance of animal and vegetable nutrition in omnivorous songbirds. Ardea 64, 140-154.
13. Bertness, M.D. and Callaway, R. (1994) Positive interactions in communities. Trends in Ecology and Evolution 9, 191-193.
14. Bosland, P.W. (1994) Chiles: history, cultivation, and uses. In: Charalambous, G. (ed.) Spices, Herbs and Edible Fungi. Elsevier, Amsterdam, pp. 347-366.
15. Bollen, A., Van Elsacker, L., and Ganzhorn, J.U. (2004) Relations between fruits and disperser assemblages in a Malagasy littoral forest: a community-level approach. Journal of Tropical Ecology 20, 599-612.
16. Bregman, R. (1988) Forms of seed dispersal in Cactaceae. Acta Botanica Neerlandica 37, 395-402.
17. Breshears, D.D., Nyhan, J.W., Heil, C.E. and Wilcox, B.P. (1998) Effects of woody plants on microclimate in a semiarid woodland: soil temperature and evaporation in canopy and intercanopy patches. International Journal of Plant Sciences 159, 1010-1017.
18. Brooks, M.L. and Pyke, D.A. (2001) Invasive plants and fire in the deserts of North America. In: Galley, K.E.M. and Wilson, T.P. (eds) Proceedings of the Invasive Species Workshop: The Role of Fire in the Control and Spread of Invasive Species. Tall Timbers Research Station, Tallahassee, Florida, pp. 1-14.
19. Buckley, Y.M., Anderson, S., Catterall, C.P., Corlett, R.T., Engel, T., Gosper, C.R., Nathan, R., Richardson, D.M., Setter, M., Spiegel, O., Vivian-Smith, G., Voigt, F.A., Weir, J.E.S. and Westcott, D.A. (2006) Management of plant invasions mediated by frugivore interactions. Journal of Applied Ecology 43, 848-857.
20. Bullock, J.A. and Moy, I.L. (2004) Plants as seed traps: inter-specific interference with dispersal. Acta Oecologica/International Journal of Ecology 25, 35-41.
21. Callaway, R.M. (1995) Positive interactions among plants. Botanical Review 61, 306-349.
22. Callaway, R.M. (1997) Positive interactions in plant communities and the individualisticcontinuum concept. Oecologia 112, 143-149.
23. Callaway, R.M. (1998) Competition and facilitation on elevation gradients in subalpine forests of the northern Rocky Mountains, USA. Oikos 82, 561-573.
24. Callaway, R.M. and Walker, L.R. (1997) Competition and facilitation: a synthetic approach to interactions in plant communities. Ecology 78, 1958-1965.
25. Campos, C.M. and Ojeda, R.A. (1997) Dispersal and germination of Prosopis flexuosa (Fabaceae) seeds by desert mammals in Argentina. Journal of Arid Environments 35, 707-714.
26. Carlo, T.A. (2005) Interspecific neighbours change seed dispersal pattern of an aviandispersed plant. Ecology 86, 2440-2449.
27. Chambers, J.C. and MacMahon, J.A. (1994) A day in the life of a seed: movement and fates of seeds and their implications for natural and managed systems. Annual Review of Ecology and Systematics 25, 263-292.
28. Chang, E.R, Zozaya, E.L., Kuijper, D.P.J. and Bakker, J.P. (2005) Seed dispersal by small herbivores and tidal water: are they important filters in the assembly of salt-marsh communities? Functional Ecology 19, 665-673.
29. Cordell, G.A. and Araujo, O.E. (1993) Capsaicin: identification, nomenclature, and pharmacotherapy. Annals of Pharmacotherapy 27, 330-336.
30. Corlett, R.T. (1996) Characteristics of vertebrate-dispersed fruits in Hong Kong. Journal of Tropical Ecology 12, 819-833.
31. Davidar, P. and Morton, E.S. (1986) The relationship between fruit crop sizes and fruit removal rates by birds. Ecology 67, 262-265.
32. Davidson, D.W. and Morton, S.R. (1984) Dispersal adaptations of some Acacia species in the Australian arid zone. Ecology 65, 1038-1051.
33. de la Barrera, E. and Nobel, P.S. (2004) Carbon and water relations for developing fruits of Opuntia ficus-indica (L.) Miller, including effects of drought and gibberellic acid. Journal of Experimental Botany 55, 719-729.
34. Dean, W.R.J. and Milton, S.J. (2000) Directed dispersal of Opuntia species in the Karoo, South Africa: are crows the responsible agents? Journal of Arid Environments 45, 305-314.
35. Dean, W.R.J., Milton, S.J. and Jeltsch, F. (1999) Large trees, fertile islands, and birds in arid savanna. Journal of Arid Environments 41, 61-78.
36. Debussche, M. and Isenmann, P. (1989) Fleshy fruit characters and the choices of bird and mammal seed dispersers in a Mediterranean region. Oikos 56, 327-338.
37. Ellner, S. and Shmida, A. (1981) Why are adaptations for long-range seed dispersal rare in desert plants? Oecologia 51, 133-144.
38. Evenari, M. (1985) The desert environment. In: Evenari, M., Noy-Meir, I. and Goodall, D.W. (eds) Hot Deserts and Arid Shrublands. Elsevier, Amsterdam, pp. 1-22.
39. Fleming, T.H. and Sosa, V.J. (1994) Effects of nectarivorous and frugivorous mammals on reproductive success of plants. Journal of Mammalogy 75, 845-851.
40. Forget, P.-M., Lambert, J.E., Hulme, P.E. and Vander Wall, S.B. (eds) (2004) Seed Fate: Predation, Dispersal and Seedling Establishment. CAB International, Wallingford, UK.
41. French, K. and Westoby, M. (1992) Removal of vertebrate-dispersed fruit in vegetation on fertile and infertile soils. Oecologia 91, 447-454.
42. Fry, C.H., Ash, J.S. and Ferguson-Lees, I.J. (1970) Spring weights of some Palaearctic migrants at Lake Chad. Ibis 112, 58-82.
43. Fuentes, M. (1994) Diets of fruit-eating birds: what are the causes of interspecific differences? Oecologica 97, 134-142.
44. Gannes, L.Z. (2001) Comparative fuel use of migrating passerines: effects of fat stores, migration distance, and diet. Auk 118, 665-677.
45. Geffen, E., Hefner, R. and Wright, P. (2004) North Africa and the Middle East (Ethiopian). In: Sillero-Zubiri, C., Hoffmann, H. and Macdonald, D.W. (eds) Canids: Foxes, Wolves, Jackals and Dogs. IUCN/SSC Canid Specialist Group. Gland, Switzerland and Cambridge, UK, pp. 194-228.
46. Godínez-Alvarez, H. (2004) Pollination and seed dispersal by lizards: a review. Revista Chilena de Historia Natural 77, 569-577.
47. Godínez-Alvarez, H., Valiente-Banuet, A. and Rojas-Martinez, A. (2002) The role of seed dispersers in the population dynamics of the columnar cactus Neobuxbaumia tetetzo. Ecology 83, 2617-2629.
48. Gosper, C.R., Stansbury, C.D. and Vivian-Smith, G. (2005) Seed dispersal of fleshy-fruited invasive plants by birds: contributing factors and management options. Diversity and Distributions 11, 549-558.
49. Greenberg, R. (1981) Frugivory in some migrant tropical forest wood warblers. Biotropica 13, 215-223.
50. Greenberg, R., Foster, M.S. and Marquez-Valdelamar, L. (1995) The role of the white-eyed vireo in the dispersal of Bursera fruit on the Yucatan Peninsula. Journal of Tropical Ecology 11, 619-639.
51. Greenberg, R., Niven, D.K., Hopp, S. and Boone, C. (1993) Frugivory and coexistence in a resident and a migratory vireo on the Yucatan Peninsula. Condor 95, 990-999.
52. Gutterman, Y. (1993) Seed Germination in Desert Plants. Springer, Berlin
53. Hacker, S.D. and Gaines, S.D. (1997) Some implications of direct positive interactions for community species diversity. Ecology 78, 1990-2003.
54. Hacker, S.D. and Bertness, M.D. (1999) Experimental evidence for factors maintaining plant species diversity in a New England salt marsh. Ecology 80, 2064-2073.
55. Hector, A., Schmid, B., Beierkuhnlein, C., Caldeira, M.C., Diemer, M., Dimitrakopoulos, P.G., Finn, J.A., Freitas, H., Giller, P.S., Good, J., Harris, R., Hogberg, P., Huss, D.K., Joshi, J., Jumpponen, A., Korner, K., Leadley, P.W., Loreau, M., Minns, A., Mulder, C.P.H., O'Donovan, G., Otway, S.J., Pereira, J.S., Prinz, A., Read, D.J., M. Scherer, E.D., Schulze, A.S.D., Siamantziouras, E.M., Spehn, A.C., Terry, A.Y., Troumbis, L., Woodward, F.I., Yachi, S. and Lawton, J.H. (1999) Plant diversity and productivity experiments in European grasslands. Science 286, 1123-1127.
56. Herrera, C.M. (1982) Seasonal variation in the quality of fruits and diffuse coevolution between plants and avian dispersers. Ecology 63, 773-85.
57. Herrera, C.M. (1984) A study of avian frugivores, bird-dispersed plants, and their interaction in Mediterranean scrublands. Ecological Monographs 54, 1-23.
58. Higgins, S.I., Nathan, R. and Cain, M.L. (2003) Are long-distance dispersal events in plants usually caused by nonstandard means of dispersal? Ecology 84, 1945-1956.
59. Holmgren, M., Scheffer, M. and Huston, M.A. (1997) The interplay of facilitation and competition in plant communities. Ecology 78, 1966-1975.
60. Howe, H.F. and Estabrook, G.F. (1977) On intraspecific competition for avian dispersers in tropical trees. American Naturalist 111, 817-832.
61. Howe, H.F. and Smallwood, J. (1982) Ecology of seed dispersal. Annual Review of Ecology and Systematics 13, 201-28.
62. Hughes, L., Dunlop, M., French, K., Leishman, M.R., Rice, B., Rodgerson, L. and Westoby, M. (1994) Predicting dispersal spectra: a minimal set of hypotheses based on plant attributes. Journal of Ecology 92, 933-950.
63. Hulme, P.E. and Benkman, C.W. (2002) Granivory. In: Herrera, C. and Pellmyr, O. (eds) Plant-Animal Interactions: An Evolutionary Approach. Blackwell, Oxford, UK, pp. 132-156.
64. Ims, R.A. (1995) Movement patterns related to spatial structures. In: Hansson, L., Fahrig, L. and Merriam, G. (eds) Mosaic Landscapes and Ecological Processes. Chapman and Hall, London, pp. 85-109.
65. Iwai, K., Suzuki, T. and Fujiwake, H. (1979) Formation and accumulation of pungent principle of hot pepper fruits, capsaicin and its analogues, in Capsicum annuum var. annuum cv. Karayatsubusa at different growth stages after flowering. Agricultural and Biological Chemistry 43, 2493-2498.
66. Izhaki, I. (2002) The role of fruit traits in determining fruit removal in East Mediterranean ecosystems. In: Levey, D.J., Silva, W.R. and Galetti. M. (eds) Dispersal and Frugivory: Ecology, Evolution and Conservation. CAB International, Wallingford, UK, pp. 161-175.
67. Izhaki, I. and Safriel, U.N. (1985) Why do fleshy-fruit plants of the Mediterranean scrub intercept fall-but not spring-passage of seed-dispersing migratory birds? Oecologia 67, 40-43.
68. Izhaki, I. and Safriel, U.N. (1990) The effect of some Mediterranean scrubland frugivores upon germination patterns. Journal of Ecology 98, 56-65.
69. Janzen, D.H. (1970) Herbivores and the number of tree species in tropical forests. American Naturalist 104, 501-528.
70. Janzen, D.H. (1980) When is it coevolution? Evolution 34, 611-612.
71. Janzen, D.H. (1984) Dispersal of small seeds by big herbivores: foliage is the fruit. American Naturalist 123, 338-53.
72. Janzen, D.H. (1986) Chihuahuan desert nopaleras: defaunated big mammal vegetation. Annual Review of Ecology and Systematics 17, 595-636.
73. Jones, P., Vickery, J., Holt, S. and Cresswell, W. (1996) A preliminary assessment of some factors influencing the density and distribution of palearctic passerine migrants wintering in the Sahel zone of West Africa. Bird Study 43, 73-84.
74. Jordano, P. (1995) Angiosperm fleshy fruits and seed dispersers: a comparative analysis of adaptation and constraints in plant-animal interactions. American Naturalist 145, 163-191.
75. Jordano, P. (2000) Fruits and frugivory. In: Fenner, M. (ed.) Seeds: The Ecology of Regeneration in Natural Plant Communities. CAB International, Wallingford, UK, pp. 105-151.
76. Jordano, P. and Schupp, E.W. (2000) Seed disperser effectiveness: the quantity component and patterns of seed rain for Prunus mahaleb. Ecological Monographs 70, 591-615.
77. Jordt, S.E. and Julius, D. (2002) Molecular basis for species-specific sensitivity to 'hot'chili peppers. Cell 108, 421-430.
78. Jurado, E., Westoby, M. and Nelson, D. (1991) Diaspore weight, dispersal, growth form and perenniality of central Australian plants. Journal of Ecology 79, 811-830.
79. Kawada, T., Watanabe, T., Katsura, K., Takami, H. and Iwai, K. (1985) Formation and metabolism of pungent principle of Capsicum fruits. 15. Microdetermination of capsaicin by high-performance liquid-chromatography with electrochemical detection. Journal of Chromatography 329, 99-105.
80. Larson, D.L. (1996) Seed dispersal by specialist versus generalist foragers: the plant's perspective. Oikos 76, 113-120.
81. Levey, D.J. and Benkman, C.W. (1999) Fruit-seed disperser interactions: timely insights from a long-term perspective. Trends in Ecology and Evolution 14, 41-43.
82. Levey, D.J. and Byrne, M.M. (1993) Complex ant-plant interactions: rain forest ants as secondary dispersers and postdispersal seed predators. Ecology 74, 1802-1812.
83. Levey, D.J., Tewksbury, J.J., Cipollini, M. and Carlo, T. (2006) A field test of the directed deterrence hypothesis in two species of wild chile. Oecologia 150, 61-68.
84. Levin, S.A. (1992) The problem of pattern and scale in ecology. Ecology 73, 1943-1967.
85. Loiselle, B.A. and Blake, J.G. (1990) Diets of understory fruit-eating birds in Costa Rica: seasonality and resource abundance. Studies in Avian Biology 13, 91-103.
86. Longland, W.S., Jenkins, S.H., Vander Wall, S.B., Veech, J.A. and Pyare, S. (2001) Seedling recruitment in Oryzopsis hymenoides: are desert granivores mutualists or predators? Ecology 82, 3131-3148.
87. Lotan, A. (2005) The impact of environmental conditions on the morphology, nutritional value and secondary metabolites in Ochradenus baccatus fruits. MSc thesis, University of Haifa, Israel.
88. Martin, A.C., Zim, H.S. and Nelson, A.L. (1951) American Wildlife and Plants: A Guide to Wildlife Food Habitats. McGraw-Hill, New York.
89. Martinez Del Rio, C., Silva, A., Medel, R. and Hourdequin, M. (1996) Seed dispersers as disease vectors: bird transmission of mistletoe seeds to plant hosts. Ecology 77, 912-921.
90. Mason, J.R., Bean, N.J., Shah, P.S. and Clark, L. (1991) Taxon-specific differences in responsiveness to capsaicin and several analogs: correlates between chemical structure and behavioural aversiveness. Journal of Chemical Ecology 17, 2539-2551.
91. McAuliffe, J.R. (1984) Sahuaro-nurse tree associations in the Sonoran Desert: competitive effects of sahuaros. Oecologia 64, 319-321.
92. McKey, D. (1975) The ecology of coevolved seed dispersal systems. In: Gilbert, L.E. and Raven, P.H. (eds) Coevolution of Animals and Plants. University of Texas Press, Austin, Texas, pp. 159-191.
93. Milesi, F.A. and De Casenave, J.L. (2004) Unexpected relationships and valuable mistakes: non-myrmecochorous Prosopis dispersed by messy leafcutting ants in harvesting their seeds. Austral Ecology 29, 558-567.
94. Milewski, A.V. (1986) A comparison of bird-plant relationships in southern Australia and southern Africa. In: Ford, H.A. and Paton, D.C. (eds) The Dynamic Partnership: Birds and Plants in Southern Africa. Flora and Fauna of South Australia Handbooks Committee, pp. 111-118.
95. Miller, A.G. (1984) A revision of Ochradenus. Notes from the Royal Botanic Garden of Edinburgh 41, 491-504.
96. Milton, S.J. (1992) Plants eaten and dispersed by adult leopard tortoises Geochelone pardalis (Reptilia, Chelonii) in the southern Karoo. South African Journal of Zoology 27, 45-49.
97. Milton, S.J. and Dean, W.R.J. (2001) Seeds dispersed in dung of insectivores and herbivores in semi-arid southern Africa. Journal of Arid Environments 47, 465-483.
98. Moermond, T.C. and Denslow, J.S. (1985) Neotropical avian frugivores: patterns of behaviour, morphology, and nutrition, with consequences for fruit selection. Ornithological Monographs 36, 865-897.
99. Moles, A.T., Ackerly, D.D., Webb, C.O., Tweddle, J.C., Dickie, J.B., Pitman, A.J. and Westoby, M. (2005) Factors that shape seed mass evolution. Proceedings of the National Academy of Sciences USA 102, 10540-10544.
100. Montiel, S. and Montana, C. (2000) Vertebrate frugivory and seed dispersal of a Chihuahuan Desert cactus. Plant Ecology 146, 221-229.
101. Morales, J.M. and Carlo, T.A. (2006) The effects of plant distribution and frugivore density on the scale and shape of dispersal kernels. Ecology 87, 1489-1496.
102. Moreau, R.E. (1972) The Palaearctic-African Bird Migration Systems. Academic Press, London.
103. Murphy, S.R., Reid, N., Zhaogui, Y. and Venables, W.N. (1993) Differential passage time of mistletoe fruits through the gut of honeyeaters and flowerpeckers: effects on seedling establishment. Oecologia 93, 171-176.
104. Naranjo, M.E., Rengifo, C. and Soriano, P.J. (2003) Effect of ingestion by bats and birds on seed germination of Stenocereus griseus and Subpilocereus repandus (Cactaceae). Journal of Tropical Ecology 19, 9-15.
105. Nathan, R. and Muller-Landau, H.C. (2000) Spatial patterns of seed dispersal, their determinants and consequences for recruitment. Trends in Ecology and Evolution 15, 278-285.
106. Nathan, R. and Casagrandi, R. (2004) A simple mechanistic model of seed dispersal, predation and plant establishment: Janzen-Connell and beyond. Journal of Ecology 92, 733-746.
107. Noy-Meir, I. (1985) Desert ecosystem structure and function. In: Evenari, M., Noy-Meir, I. and Goodall, D.W. (eds) Hot Deserts and Arid Shrublands. Elsevier, Amsterdam, pp. 93-103.
108. Parker, C. (1988) Environmental relationships and vegetation associations of columnar cacti in the northern Sonoran Desert. Vegetatio 78, 125-140.
109. Perramond, E. (2005) The politics of ecology: local knowledge and wild chili collection in Sonora, Mexico. Journal of Latin American Geography 4, 59-75.
110. Pickersgill, B. and Heiser, C.B. (1977) Origins and distribution of plants domesticated in the New World tropics. In: Reed, C.A. (ed.) Origins of Agriculture. Mouton, The Hague, The Netherlands, pp. 803-886.
111. Pickersgill, B., Heiser, C. and McNeill, J. (1979) Numerical taxonomic studies on variation and domestication in some species of Capsicum. In: Hawkes, J.G., Lester, R.N. and Skelding, A.D. (eds) The Biology and Taxonomy of the Solanaceae. Academic Press, London, pp. 679-700.
112. Place, A.R. and Stiles, E.W. (1992) Living off the wax of the land: bayberries and yellowrumped warblers. Auk 109, 334-345.
113. Racine, C.H. and Downhower, J.F. (1974) Vegetative and reproductive strategies of Opuntia (Cactaceae) in the Galapagos Islands. Biotropica 6, 175-186.
114. Reid, N. (1989) Dispersal of mistletoes by honeyeaters and flowerpeckers: components of seed dispersal quality. Ecology 70, 137-145.
115. Richardson, D.M., Allsopp, N., D'Antonio, C.M., Milton, S.J. and Rejmanek, M. (2000) Plant invasions: the role of mutualisms. Biological Reviews of the Cambridge Philosophical Society 75, 65-93.
116. Russell, S.M. and Monson, G. (1998) The Birds of Sonora. University of Arizona Press, Tucson, Arizona.
117. Sallabanks, R. (1993) Hierarchical mechanisms of fruit selection by an avian frugivore. Ecology 74, 1326-1336.
118. Samuels, I.A. and Levey, D.J. (2005) Effects of gut passage on seed germination: do experiments answer the questions they ask? Functional Ecology 19, 365-368.
119. Sapir, N., Abramsky, Z., Shochat, E. and Izhaki, I. (2004) Scale-dependent habitat selection in migratory frugivorous passerines. Naturwissenschaften 91, 544-547.
120. Sargent, S. (1990) Neighborhood effects on fruit removal by birds: a field experiment with Viburnum dentatum (Caprifoliaceae). Ecology 71, 1289-1298.
121. Schlesinger, W.H., Raikes, J.A., Hartley, A.E. and Cross, A.E. (1996) On the spatial pattern of soil nutrients in desert ecosystems. Ecology 77, 364-374.
122. Schmidt-Nielsen, K. (1964) Desert Animals: Physiological Problems of Heat and Water. Clarendon Press, Oxford, UK.
123. Schupp, E.W. (1992) The Janzen-Connell model for tropical tree diversity: population implications and the importance of spatial scale. American Naturalist 140, 526-530.
124. Schupp, E.W., Milleron, T. and Russo, S.E. (2002) Dissemination limitation and the origin and maintenance of species-rich tropical forests. In: Levey, D.J., Silva, W.R. and Galetti, M. (eds) Seed Dispersal and Frugivory: Ecology, Evolution and Conservation. CAB International, Wallingford, UK, pp. 19-33.
125. Schütz, W. and Milberg, P. (1997) Seed germination in Launaea arborescens: a continuously flowering semi-desert shrub. Journal of Arid Environments 36, 113-122.
126. Shreve, F. (1931) Physical conditions in sun and shade. Ecology 12, 96-104.
127. Shreve, F. (1951) Vegetation of the Sonoran Desert. Carnegie Institution Publication 591, Washington, DC.
128. Silvius, K.M. (1995) Avian consumers of cardon fruits (Stenocereus griseus, Cactaceae) on Margarita Island, Venezuela. Biotropica 27, 96-105.
129. Snow, D.W. (1985) The Web of Adaptation: Bird Studies in the American Tropics. Cornell University Press, Ithaca, New York.
130. Spiegel, O. (2006) Frugivory and seed dispersal in desert ecosystems: scale-dependent dispersal effectiveness. MSc thesis, The Hebrew University of Jerusalem, Jerusalem, Israel.
131. Steenbergh, W.F. and Lowe, C.H. (1977) Ecology of the Saguaro. II. Reproduction, Germination, Establishment, Growth, and Survival of the Young Plant. US Government Printing Office, Washington, DC.
132. Stiles, E.W. (1993) The influence of pulp lipids on fruit preference by birds. Vegetatio 108, 227-235.
133. Stoate, C. and Moreby, S.J. (1995) Premigratory diet of trans-Saharan migrant passerines in the western Sahel. Bird Study 42, 101-106.
134. Sung, Y., Chang, Y.Y. and Ting, N.L. (2005) Capsaicin biosynthesis in water-stressed hot pepper fruits. Botanical Bulletin of Academia Sinica 46, 35-42.
135. Tester, M.D., Paton, C., Reid, N. and Lange, R.T. (1987) Seed dispersal by birds and densities of shrubs under trees in arid South Australia. Transactions of the Royal Society of South Australia 111, 1-5.
136. Tewksbury, J.J. and Lloyd, J.D. (2001) Positive interactions under nurse-plants: spatial scale, stress gradients and benefactor size. Oecologia 127, 425-434.
137. Tewksbury, J.J. and Nabhan, G.P. (2001) Seed dispersal: directed deterrence by capsaicin in chillies. Nature 412, 403-404.
138. Tewksbury, J.J. and Petrovich, C.A. (1994) The influence of ironwood as a habitat modifier species. In: Nabhan, J.P. and Carr, J.L. (eds) Ironwood: An Ecological and Cultural Keystone of the Sonoran Desert. University of Chicago Press, Chicago, Illinois, pp. 29-54.
139. Tewksbury, J.J., Nabhan, G.P., Norman, D., Suzan, H., Tuxill, J. and Donovan, J. (1999) In situ conservation of wild chiles and their biotic associates. Conservation Biology 13, 98-107.
140. Tews, J., Moloney, K. and Jeltsch, F. (2004) Modeling seed dispersal in a variable environment: a case study of the fleshy-fruited savanna shrub Grewia flava. Ecological Modelling 175, 65-76.
141. Turner, R.M., Alcorn, S.M., Olin, G. and Booth, J.A. (1966) The influence of shade, soil and water on saguaro seedling establishment. Botanical Gazette 127, 95-102.
142. Valido, A. and Nogales, M. (1994) Frugivory and seed dispersal by the lizard Gallotia galloti (Lacertidae) in a xeric habitat of the Canary Islands. Oikos 70, 403-411.
143. Valiente-Banuet, A. and 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.
144. van Rheede van Oudtshoorn, K. and van Rooyen, M.W. (1999) Dispersal Biology of Desert Plants. Springer, Berlin.
145. van Rooyen, M.W., Theron, G.K. and Grobbelaar, N. (1990) Life form and dispersal spectra of the flora of Namaqualand, South Africa. Journal of Arid Environments 19, 133-145.
146. Vander Wall, S.B. and Longland, W.S. (2004) Diplochory: are two seed dispersers better than one? Trends in Ecology and Evolution 19, 155-161.
147. Villagra, P.E., Marone, L. and Cony, M.A. (2002) Mechanisms affecting the fate of Prosopis flexuosa (Fabaceae, Mimosoideae) seeds during early secondary dispersal in the Monte Desert, Argentina. Austral Ecology 27, 416-421.
148. Vulinec, K. (2002) Dung beetle communities and seed dispersal in primary forest and disturbed land in Amazonia. Biotropica 34, 297-309.
149. Walsberg, G.E. (1977) Ecology and energetics of contrasting social systems in Phainopepla nitens (Aves: Ptilogonatidae). University of California Publications in Zoology 108, 1-63.
150. Walsh, B.M. and Hoot, S.B. (2001) Phylogenetic relationships of Capsicum (Solanaceae) using DNA sequences from two noncoding regions: the chloroplast atpB-rbcL spacer region and nuclear waxy introns. International Journal of Plant Science 162, 1409-1418.
151. Ward, D. and Saltz, D. (1994) Foraging at different spatial scales: Dorcas gazelles foraging for lilies in the Negev desert. Ecology 75, 48-58.
152. Westoby, M., French, K., Hughes, L., Rice, B. and Rodgerson, L. (1991) Why do more plant species use ants for dispersal on infertile compared with fertile soils? Australian Journal of Ecology 16, 445-455.
153. Whiting, M.J. and Greeff, J.M. (1997) Facultative frugivory in the Cape flat lizard, Platysaurus capensis (Sauria: Cordylidae). Copeia, 811-818.
154. Williams, J.B. and Tieleman, B.I. (2002) Ecological and evolutionary physiology of desert birds: a progress report. Integrative and Comparative Biology 42, 68-75.
155. Willson, M.F. (1986) Avian frugivory and seed dispersal in eastern North America. Current Ornithology 3, 223-279.
156. Willson, M.F., Irvine, A.K. and Walsh, N.G. (1989) Vertebrate dispersal syndromes in some Australian and New Zealand plant communities, with geographic comparisons. Biotropica 21, 133-147.
157. Willson, M.F., Rice, B.L. and Westoby, M. (1990) Seed dispersal spectra: a comparison of temperate plant communities. Journal of Vegetation Science 1, 547-562.
158. Witmer, M.C. (1996) Do some bird-dispersed fruits contain natural laxatives? A comment. Ecology 77, 1947-1948.
159. Witmer, M.C. and Van Soest, P.J. (1998) Contrasting digestive strategies of fruit-eating birds. Functional Ecology 12, 728-741.
160. Wolf, B.O. and Martinez del Rio, C. (2000) Use of saguaro fruit by white-winged doves: isotopic evidence of a tight ecological association. Oecologia 124, 536-543.
161. Wolf, B.O., Martinez del Rio, C. and Babson, J. (2002) Stable isotopes reveal that saguaro fruit provides different resources to two desert dove species. Ecology 83, 1286-1293.
162. Wolf, B.O. and Martinez del Rio, C. (2003) How important are columnar cacti as source of water and nutrients for desert consumers? A review. Isotopes in Environmental and Health Studies 39, 53-67.
163. Wolfe, L.M. and Shmida, A. (1995) Regulation of gender and flowering behaviour in a sexually dimorphic desert shrub (Ochradenus baccatus Delile [Resedaceae]). Israel Journal of Plant Sciences 43, 325-337.
164. Wolfe, L.M. and Shmida, A. (1997) The ecology of sex expression in a gynodioecious Israeli desert shrub (Ochradenus baccatus). Ecology 78, 101-110.
165. Wolfe, L.M. and Burns, J.L. (2001) A rare continual flowering strategy and its influence on offspring quality in a gynodioecious plant. American Journal of Botany 88, 1419-1423.
166. Zohary, M. (1966) Flora Palaestina. I. Israel Academy of Sciences and Humanities, Jerusalem, Israel.