, Volume 155, Issue 3, pp 529–537 | Cite as

Effectiveness of rodents as local seed dispersers of Holm oaks

  • José M. Gómez
  • Carolina Puerta-Piñero
  • Eugene W. Schupp
Plant-Animal Interactions - Original Paper


In this study we assessed the effectiveness of rodents as dispersers of Quercus ilex in a patchy landscape in southeastern Spain. We experimentally followed the fates of 3,200 marked and weighed acorns from dispersal through the time of seedling emergence over three years. Rodents handled about 99% of acorns, and dispersed 67% and cached 7.4% of the dispersed acorns. Most caches were recovered and consumed, and only 1.3% of the original experimental acorns were found alive in caches the following spring. Dispersal distances were short (mean = 356.2 cm, median = 157 cm) and strongly right-skewed. Heavier acorns were dispersed further and were more likely to be cached and survive than lighter acorns. All caches were in litter or soil, and each contained a single acorn. Rodents moved acorns nonrandomly, mostly to oaks and pines. Most surviving acorns were either in oaks, a poor microhabitat for oak recruitment, or shrubs, a suitable microhabitat for oak recruitment. Our results suggest that rodents, by burying a relatively high proportion of acorns singly in shrubs and pines, act as moderately effective dispersers of Q. ilex. Nonetheless, this dispersal comes at a very heavy cost.


Acorn dispersal Apodemus sylvaticus Disperser effectiveness Quercus ilex Sciurus vulgaris 


  1. Alcantara JM, Rey PJ, Sánchez-Lafuente AM, Valera F (2000) Early effects of rodent post-dispersal seed predation on the outcome of the plant–seed disperser interaction. Oikos 88:362–370CrossRefGoogle Scholar
  2. Bates D (2005) Fitting linear mixed models in R. R News 5:27–30Google Scholar
  3. Bonfil C (1998) The effect of seed size, cotyledon reserves, and herbivory on seedling survival and growth in Quercus rugosa and Q. laurina (Fagaceae). Am J Bot 85:79–87CrossRefGoogle Scholar
  4. Cheng J, Xiao Z, Zhang Z (2005) Seed consumption and caching on seeds of three sympatric tree species by four sympatric rodent species in a subtropical forest, China. For Ecol Manage 216:331–341CrossRefGoogle Scholar
  5. Darley-Hill S, Johnson WC (1981) Acorn dispersal by the blue jay (Cyanocitta cristata). Oecologia 50:231–232CrossRefGoogle Scholar
  6. Espelta JM, Riba M, Retana J (1995) Patterns of seedling recruitment in west Mediterranean coppiced holm-oak (Quercus ilex L.) forests as influenced by canopy development. J Veg Sci 6:465–472CrossRefGoogle Scholar
  7. Fedriani JM, Manzaneda A (2005) Pre- and post-dispersal seed predation by rodents: balance of food and safety. Behav Ecol 16:1018–1024CrossRefGoogle Scholar
  8. Forget PM, Lambert JR, Hulme PE, Vander Wall SB (2005) Seed fate: predation, dispersal and seedling establishment. CABI Publishing, Wallingford, UKGoogle Scholar
  9. Giannoni SM, Dacar M, Taraborelli P, Borghi CE (2001) Seed hoarding by rodents of the Monte Desert, Argentina. Austral Ecol 26:259–263Google Scholar
  10. Gómez JM (2003) Spatial patterns in long-distance dispersal of Quercus ilex acorns by jays in a heterogeneous landscape. Ecography 26:573–584CrossRefGoogle Scholar
  11. Gómez JM (2004a) Importance of microhabitat and acorn burial on Quercus ilex early recruitment: non-additive effects on multiple demographic processes. Plant Ecol 192:287–297Google Scholar
  12. Gómez JM (2004b) Bigger is not always better: conflicting selective pressures on seed size in Quercus ilex. Evolution 58:71–80PubMedGoogle Scholar
  13. Gómez JM, García D, Zamora R (2003) Impact of vertebrate acorn- and seedling-predators on a Mediterrean Quercus pyrenaica forest. For Ecol Manage 180:125–134CrossRefGoogle Scholar
  14. Gómez-Aparicio L, Zamora R, Gómez JM, Hódar JA, Castro J, Baraza E (2004) Applying plant facilitation to forest restoration: a meta-analysis of the use of shrubs as nurse plants. Ecol Appl 14:1128–1138CrossRefGoogle Scholar
  15. Gómez-Aparicio L, Gómez JM, Zamora R, Boettinger JL (2005a) Canopy versus soil effects of shrubs facilitating tree seedlings in Mediterranean montane ecosystems. J Veg Sci 16:191–198CrossRefGoogle Scholar
  16. Gómez-Aparicio L, Valladares F, Zamora R, Quero JL (2005b) Response of tree seedlings to the abiotic heterogeneity generated by nurse shrubs: an experimental approach at different scales. Ecography 28:757–768CrossRefGoogle Scholar
  17. Hollander JL, Vander Wall SB (2004) Effectiveness of six species of rodents as dispersers of single leaf pinon pine (Pinus monophylla). Oecologia 138:57–65PubMedCrossRefGoogle Scholar
  18. Howe HF, Smallwood J (1982) Ecology of seed dispersal. Annu Rev Ecol Syst 13:201–228CrossRefGoogle Scholar
  19. Hulme PE (2002) Seed-eaters: seed dispersal, destruction and demography. In: Levey DJ, Silva WR, Galetti M (eds) Seed dispersal and frugivory: ecology, evolution and conservation. CAB International, Wallingford, UK, pp 257–273Google Scholar
  20. Ibáñez I, Schupp EW (2001) Positive and negative interactions between environmental conditions affecting Cercocarpus ledifolius seedling survival. Oecologia 129:543–550Google Scholar
  21. Iida S (1996) Quantitative analysis of acorn transportation by rodents using magnetic locator. Vegetatio 124:39–43CrossRefGoogle Scholar
  22. Iida S (2004) Indirect negative influence of dwarf bamboo on survival of Quercus acorns by hoarding behavior of wood mice. For Ecol Manage 202:257–263CrossRefGoogle Scholar
  23. Iida S (2006) Dispersal patterns of Quercus serrata acorns by wood mice in and around canopy gaps in a temperate forest. For Ecol Manage 227:71–78CrossRefGoogle Scholar
  24. Jansen PA, Bongers F, Hemerik L (2004) Seed mass and mast seeding enhance dispersal by a neotropical scatter-hoarding rodent. Ecol Monogr 74:569–589CrossRefGoogle Scholar
  25. Jensen TS (1985) Seed-seed predator interactions of European beech, Fagus sylvatica and forest rodents, Clethrionomys glareolus and Apodemus flavicollis. Oikos 44:149–156CrossRefGoogle Scholar
  26. Jensen TS, Nielsen OF (1986) Rodents as seed dispersers in a heath-oak wood succession. Oecologia 70:214–221CrossRefGoogle Scholar
  27. Li HJ, Zhang ZB (2003) Effect of rodents on acorn dispersal and survival of Liaondong oak (Quercus liatungensis Koidz.). For Ecol Manage 176:387–396CrossRefGoogle Scholar
  28. Li HJ, Zhang ZB (2007) Effects of mast seeding and rodent abundance on seed predation and dispersal by rodents in Prunus armeniaca (Rosaceae). For Ecol Manage 242:511–517CrossRefGoogle Scholar
  29. Mendoza E, Dirzo R (2007) Seed-size variation determines interspecific differential seed predation by mammals in a neotropical rain forest. Oikos 116:1841–1852Google Scholar
  30. Miriti MN (2006) Ontogenetic shift from facilitation to competition in a desert shrub. J Ecol 94:973–979CrossRefGoogle Scholar
  31. Muñoz A, Bonal R (2007) Rodents change acorn dispersal behaviour in response to ungulate presence. Oikos 116:1631–1638CrossRefGoogle Scholar
  32. Pons JM, Pausas J (2007a) Acorn dispersal estimated by radio-tracking. Oecologia 153:903–911PubMedCrossRefGoogle Scholar
  33. Pons JM, Pausas J (2007b) Rodent acorn selection in a Mediterranean oak landscape. Ecol Res 22:535–541CrossRefGoogle Scholar
  34. Puerta-Piñero C, Gómez JM, Zamora R (2006) Species-specific effects on topsoil development affect Quercus ilex seedling performance. Acta Oecol 29:65–71CrossRefGoogle Scholar
  35. Puerta-Piñero C, Gómez JM, Valladares F (2007) Irradiance and oak seedling survival and growth in a heterogeneous environment. For Ecol Manage 242:462–469CrossRefGoogle Scholar
  36. Pulido FJ (2002) Biología reproductiva y conservación: el caso de la regeneración de bosques templados y subtropicales de robles (Quercus spp.). Rev Chil Hist Nat 75:5–15CrossRefGoogle Scholar
  37. Pulido FJ, Díaz M (2005) Regeneration of a Mediterranean oak: a whole-cycle approach. EcoScience 12:92–102CrossRefGoogle Scholar
  38. Purves DW, Zavala MA, Ogle K, Prieto F, Rey Benayas JM (2007) Environmental heterogeneity, bird-mediated directed dispersal, and oak woodland dynamics in Mediterranean Spain. Ecol Monogr 77:77–98CrossRefGoogle Scholar
  39. Retana J, Espelta JM, Gracia M, Riba M (1999) Seedling recruitment. In: Rodá F, Retana J, Gracia CA, Bellot J (eds) Ecology of Mediterranean evergreen oak forests. Springer, Berlin, pp 89–103Google Scholar
  40. Rey P, Alcántara JM (2000) Recruitment dynamics of a fleshy-fruited plant (Olea europaea): connecting patterns of seed dispersal to seedling establishment. J Ecol 88:622–633CrossRefGoogle Scholar
  41. Rey P, Garrido JL, Alcántara JM, Ramírez JM, Aguilera A, García L, Manzaneda AJ, Fernández R (2002) Spatial variation in ant and rodent post-dispersal predation of vertebrate-dispersed seeds. Funct Ecol 16:773–781CrossRefGoogle Scholar
  42. Roth JK, Vander Wall SB (2005) Primary and secondary seed dispersal of bush chinquapin (Fagaceae) by scatterhoarding rodents. Ecology 86:2428–2439CrossRefGoogle Scholar
  43. Santos T, Tellería JL (1997) Vertebrate predation on Holm oaks, Quercus ilex, acorns in a fragmented habitat: effects on seedling recruitment. For Ecol Manage 98:181–187CrossRefGoogle Scholar
  44. SAS Institute Inc. (2005) SAS/STAT Software: changes and enhancements through release 6.12. SAS Institute Inc., Cary, NCGoogle Scholar
  45. Schupp EW (1990) Annual variation in seedfall, post-dispersal predation and recruitment of a neotropical tree. Ecology 71:504–515CrossRefGoogle Scholar
  46. Schupp EW (1993) Quantity, quality and the effectiveness of seed dispersal by animals. Vegetatio 107/108:15–29Google Scholar
  47. Schupp EW (2007) The suitability of a site for seed dispersal is context-dependent. In: Dennis AJ, Schupp EW, Green RJ, Westcott DA (eds) Seed dispersal: theory and its application in a changing world. CABI International, Wallingford, UK, pp 445–462Google Scholar
  48. Schupp EW, Fuentes M (1995) Spatial patterns of seed dispersal and the unification of plant population ecology. Écoscience 2:267–275Google Scholar
  49. Seiwa K (2000) Effects of seed size and emergence time on tree seedling establishment: importance of developmental constraints. Oecologia 123:208–215CrossRefGoogle Scholar
  50. Seiwa K, Watanabe A, Irie K, Kannu H, Saitoh T, Akasaka S (2002a) Impact of site-induced mouse caching and transport behaviour on regeneration in Castanea crenata. J Veg Sci 13:517–526CrossRefGoogle Scholar
  51. Seiwa K, Watanabe A, Saitoh T, Kannu H, Akasaka S (2002b) Effects of burying depth and seed size on seedling establishment of Japanese chestnuts, Castanea crenata. For Ecol Manage 164:149–156CrossRefGoogle Scholar
  52. Sork VL (1984) Examination of seed dispersal and survival on red oak, Quercus rubra (Fagaceae), using metal-tagged acorns. Ecology 65:1020–1022CrossRefGoogle Scholar
  53. Stapanian MA, Smith CC (1978) A model for seed scatter-hoarding: coevolution of fox squirrels and black walnuts. Ecology 59:884–898CrossRefGoogle Scholar
  54. Stapanian MA, Smith CC (1984) Density-dependent survival of scatterhoarded nuts: an experimental approach. Ecology 65:1387–1396CrossRefGoogle Scholar
  55. Takahashi K, Sato K, Washitani I (2006) The role of the wood mouse in Quercus serrata acorn dispersal in abandoned cut-over land. For Ecol Manage 229:120–127CrossRefGoogle Scholar
  56. Tomita M, Hirabuki Y, Seiwa K (2002) Post-dispersal changes in the spatial distribution of Fagus crenata seeds. Ecology 83:1560–1565CrossRefGoogle Scholar
  57. Traveset A, Gulias J, Nieras N, Mus M (2003) Transition probabilities from pollination to establishment in a rare dioecious species (Rhamnus ludovici-salvatoris) in two habitats. J Ecol 91:427–437CrossRefGoogle Scholar
  58. Tripathi RS, Khan ML (1990) Effects of seed weight and microsite characteristics on germination and seedling fitness in two species of Quercus in a subtropical wet hill forest. Oikos 57:289–296CrossRefGoogle Scholar
  59. Tyler CM, Kuhn B, Davis FW (2006) Demography and recruitment limitations of three oak species in California. Q Rev Biol 81:127–152PubMedCrossRefGoogle Scholar
  60. Vander Wall SB (1990) Food hoarding in animals. The University of Chicago Press, Chicago, ILGoogle Scholar
  61. Vander Wall SB (2001) The evolutionary ecology of nut dispersal. Bot Rev 67:74–117CrossRefGoogle Scholar
  62. Vander Wall SB (2002) Secondary dispersal of Jeffrey pine seeds by rodent scatter-hoarding: the roles of pilfering, reaching and a variable environment. In: Levey DJ, Silva WR, Galetti M (eds) Seed dispersal and frugivory: ecology, evolution and conservation. CAB International, Wallingford, UK, pp 193–208Google Scholar
  63. Vander Wall SB, Longland WS (2004) Diplochory: are two seed dispersers better than one? Trends Ecol Evol 19:155–161PubMedCrossRefGoogle Scholar
  64. Vander Wall SB, Kuhn KM, Beck MJ (2005) Seed removal, seed predation, and secondary dispersal. Ecology 86:801–806CrossRefGoogle Scholar
  65. Wenny DG (2001) Advantages of seed dispersal: a re-evaluation of directed dispersal. Evol Ecol Res 3:51–74Google Scholar
  66. Xiao Z, Zhang Z, Wang Y (2004) Dispersal and germination of big and small nuts of Quercus serrata in a subtropical broad-leaved evergreen forest. For Ecol Manage 195:141–150CrossRefGoogle Scholar
  67. Xiao Z, Jansen PA, Zhang Z (2006a) Using seed-tagging methods for assessing post-dispersal seed fate in rodent-dispersed trees. For Ecol Manage 223:18–23CrossRefGoogle Scholar
  68. Xiao Z, Wang Y, Harris M, Zhang Z (2006b) Spatial and temporal variation of seed predation and removal of sympatric large-seeded species in relation to innate seed traits in a subtropical forest, Southwest China. For Ecol Manage 222:46–54CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • José M. Gómez
    • 1
  • Carolina Puerta-Piñero
    • 1
  • Eugene W. Schupp
    • 2
  1. 1.Dpto de EcologíaUniversidad de GranadaGranadaSpain
  2. 2.Department of Wildland Resources and the Ecology CenterUtah State UniversityLoganUSA

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