Ecological Research

, 24:1187 | Cite as

Seed dispersal and predation in the endemic Atlantic rainforest palm Astrocaryum aculeatissimum across a gradient of seed disperser abundance

  • Camila I. Donatti
  • Paulo R. GuimarãesJr.
  • Mauro Galetti
Original Article


Tropical forests have been subject to intense hunting of medium and large frugivores that are important in dispersing large-seeded species. It has been hypothesized that in areas with extinction or low abundance of medium and large-bodied animals the density of small rodents may increase. Therefore, this increment in the density of small rodents may compensate for the absence or low abundance of medium and large frugivores on seed removal and seed dispersal. Here, we fill up this gap in the literature by determining if seed removal, seed dispersal, and seed predation by small rodents (spiny rats, Trinomys inheringi and squirrels, Sciurus ingrami) are maintained in defaunated areas. We accessed seed removal, seed dispersal, seed predation, and seedling recruitment of an endemic Atlantic rainforest palm, Astrocaryum aculeatissimum, in a gradient of abundance of agoutis. We found that seed removal, scatter hoarding, and seed predation increase with the abundance of agoutis. In contrast, the proportion of dispersed but non-cached seeds decreased with the abundance of agoutis. We did not find any effect of the abundance of agoutis on seed dispersal distance, but we did find a positive trend on the density of seedlings. We concluded that small rodents do not compensate the low abundance of agoutis on seed removal, scatter hoarding, and seed predation of this palm tree. Moreover, areas in which agoutis are already extinct did not present any seed removal or scatter hoarding, not even by small rodents. This study emphasizes both the importance of agoutis in dispersing seeds of A. aculeatissimum and the collapse in seed dispersal of this palm in areas where agoutis are already extinct.


Compensation Dasyprocta Defaunation Trinomys Sciurus 



We would like to thank Fundação O Boticário de Proteção à Natureza (056620022), FAPESP – Fundação de Amparo a Pesquisa do Estado de São Paulo (01/10300-4) and Idea Wild for financial support. We also thank Instituto Florestal for permission to work in their Protected Areas and Rodolfo Dirzo, Carol Boggs, Pierre-Michael Forget, José Fragoso, Patrick Jansen, and Roger Guevara for their valuable comments on this paper. Philip Hubbard, Connie Rylance, and Reese Rogers kindly helped us with the English. CID received a CAPES scholarship, MG receives CNPq and FAPESP fellowships, and PRGJ a FAPESP fellowship.


  1. Almeida LB, Galetti M (2007) Seed dispersal and spatial distribution of Attalea geraensis (Arecaceae) in two remnants of Cerrado in southeastern Brazil. Acta Oecol 32:180–187. doi:10.1016/j.actao.2007.04.001 CrossRefGoogle Scholar
  2. Asquith NM, Mejia-Chang M (2005) Mammals, edge effects, and the loss of tropical forest diversity. Ecology 86:379–390. doi:10.1890/03-0575 CrossRefGoogle Scholar
  3. Asquith NM, Terborgh J, Arnold AE, Mailén Riveros C (1999) The fruits the agouti ate: Hymenaea courbaril seed fate when its disperser is absent. J Trop Ecol 15:229–235. doi:10.1017/S0266467499000772 CrossRefGoogle Scholar
  4. Beck-King H, Von Helversen O, Beck-King R (1999) Home range, population density, and food resources of Agouti paca (Rodentia: Agoutidae) in Costa Rica: a study using alternative methods. Biotropica 31:675–685. doi:10.1111/j.1744-7429.1999.tb00417.x CrossRefGoogle Scholar
  5. Blate GM, Peart DR, Leighton M (1998) Post-dispersal predation on isolated seeds: a comparative study of 40 tree species in a Southeast Asian rainforest. Oikos 82:522–538. doi:10.2307/3546373 CrossRefGoogle Scholar
  6. Brewer SW, Rejmanek M (1999) Small rodents as significant dispersers of tree seeds in a Neotropical forest. J Veg Sci 10:165–174. doi:10.2307/3237138 CrossRefGoogle Scholar
  7. Cullen L Jr, Bodmer RE, Padua CV (2000) Effects of hunting in habitat fragments of the Atlantic forests, Brazil. Biol Conserv 95:49–56. doi:10.1016/S0006-3207(00)00011-2 CrossRefGoogle Scholar
  8. Dirzo R, Mendoza E, Ortiz P (2007) Size differential seed predation in a heavily defaunated Neotropical rain forest. Biotropica 39:355–362. doi:10.1111/j.1744-7429.2007.00274.x CrossRefGoogle Scholar
  9. Emmons LH, Feer E (1997) Neotropical rainforest mammals: a field guide. University of Chicago Press, ChicagoGoogle Scholar
  10. Forget P-M (1990) Seed dispersal of Vouacaporia americana by caviomorph rodents in French Guiana. J Trop Ecol 6:459–468CrossRefGoogle Scholar
  11. Forget P-M (1991) Scatterhoarding by Astrocaryum paramaca by Proechymis in French Guiana: comparison with Myoprocta exilis. J Trop Ecol 32:155–167Google Scholar
  12. Forget P-M, Wenny DG (2005) How to elucidate seed fate? A review of methods used to study seed removal and secondary seed dispersal. In: Forget P-M, Lambert JE, Hulme PE, VanderWall SB (eds) Seed fate: predation, dispersal and seedling establishment. CAB International, Wallingford, pp 379–394Google Scholar
  13. Forget P-M, Merona JMR, Julliot C (2001) The effects of forest type, harvesting and stand refinement in a tropical rain forest. J Trop Ecol 17:593–609. doi:10.1017/S0266467401001444 CrossRefGoogle Scholar
  14. Fragoso JMV, Huffman JM (2000) Seed-dispersal and seedling recruitment patterns by the last Neotropical megafaunal element in Amazonia, the tapir. J Trop Ecol 16:369–385. doi:10.1017/S0266467400001462 CrossRefGoogle Scholar
  15. Galetti M, Bueno RS, Bernardo CSS, Bovendorp RS, Steffler CE, Rubim P, Gobbo SK, Marques RM, Nobre RA, Donatti CI, Begotti RA, Meirelles F, Giacomini H, Chiarello A, Peres CA (2009) Conservation priorities and regional scale determinants of medium and large mammal abundance across the Atlantic forest biome. Biol Conserv (in press)Google Scholar
  16. Galetti M, Ziparro VB, Morellato PC (1999) Fruiting phenology and frugivory on the palm Euterpe edulis in a lowland Atlantic forest of Brazil. Ecotropica 5:115–122Google Scholar
  17. Galetti M, Keuroghlian A, Hanada L, Morato MI (2001) Frugivory and seed dispersal by the lowland tapir (Tapirus terrestris) in southeast Brazil. Biotropica 33:723–726Google Scholar
  18. Galetti M, Donatti CI, Pires AS, Guimarães PR Jr, Jordano P (2006) Seed survival and dispersal of an endemic Atlantic forest palm: the combined effects of defaunation and forest fragmentation. Bot J Linn Soc 151:141–149. doi:10.1111/j.1095-8339.2006.00529.x CrossRefGoogle Scholar
  19. Guariguata MR, Claire HA, Jones G (2002) Tree seed fate in a logged and fragmented forest landscape, northeastern Costa Rica. Biotropica 34:405–415Google Scholar
  20. Guimarães PR Jr, Kubota U, Gomes BZ, Fonseca RL, Bottcher C, Galetti M (2006) Testing the quick meal hypothesis: the effect of pulp on hoarding and seed predation of Hymenaea courbaril by red-rumped agoutis (Dasyprocta leporina). Austral Ecol 31:95–98. doi:10.1111/j.1442-9993.2006.01554.x CrossRefGoogle Scholar
  21. Hallwacks W (1986) Agoutis (Dasyprocta punctata), the inheritors of guapinol (Hymenaea courbaril: Leguminosae). In: Estrada A, Fleming JH (eds) Frugivores and seed dispersal. Dr. W. Junk Publishers, Boston, pp 285–304Google Scholar
  22. Hammond DS, Brown VK, Zagt R (1999) Spatial and temporal patterns of seed attack and germination in a large-seeded Neotropical tree species. Oecologia 119:208–218. doi:10.1007/s004420050778 CrossRefGoogle Scholar
  23. Henderson A, Galeano G, Bernal R (1995) Field guide to the palms of the Americas. Princeton University Press, PrincetonGoogle Scholar
  24. Jansen PA, Bongers F, Hemerik L (2004) Seed mass and mast seeding enhance dispersal by a Neotropical scatter-hoarding rodent. Ecol Monogr 74:569–589. doi:10.1890/03-4042 CrossRefGoogle Scholar
  25. Lorenzi H, Souza HM, Medeiros-Costa JT, Cerqueira LSC, Von Behr N (1996) Palmeiras no Brasil–Nativas e Exóticas. Ed. Plantarum, Nova Odessa, BrazilGoogle Scholar
  26. Losos E (1995) Habitat specificity of two palms species: experimental transplantation in Amazon successional forest. Ecology 76:2595–2606. doi:10.2307/2265830 CrossRefGoogle Scholar
  27. Oliveira-Filho AT, Fontes MAL (2000) Patterns of floristic differentiation among Atlantic forests in southeastern Brazil and the influence of climate. Biotropica 32(4b):793–810CrossRefGoogle Scholar
  28. Peres CA (2000) Effects of subsistence hunting on vertebrate community structure in Amazonian forests. Conserv Biol 14:240–253. doi:10.1046/j.1523-1739.2000.98485.x CrossRefGoogle Scholar
  29. Peres CA, Van Roosmalen M (2002) Primate frugivory in two species-rich Neotropical forests: implications for the demography of large-seeded plants in overhunted areas. In: Levey DJ, Silva WR, Galetti M (eds) Seed dispersal and frugivory: ecology. evolution and conservation. CABI Publishing, Wallingford, pp 407–422Google Scholar
  30. Peres CA, Schiesdari LC, Dias-Leme CL (1997) Vertebrate predation of Brazil-nuts (Bertholletia excelsa, Lecythidaceae), an agouti-dispersed Amazonian seed crop: a test of the escape hypothesis. J Trop Ecol 13:69–79CrossRefGoogle Scholar
  31. Pimentel DS, Tabarelli M (2004) Seed dispersal of the palm Attalea oleifera in a remnant of the Brazilian Atlantic Forest. Biotropica 36(1):74–84. doi:10.1111/j.1744-7429.2004.tb00298.x CrossRefGoogle Scholar
  32. Roldán AI, Simonetti JA (2001) Plant-animal interactions in tropical Bolivian forests with different hunting pressures. Conserv Biol 15(3):617–623. doi:10.1046/j.1523-1739.2001.015003617.x CrossRefGoogle Scholar
  33. Sanchez-Cordero V, Martinez-Gallardo R (1998) Postdispersal fruit and seed removal by forest-dwelling rodents in a lowland rainforest in Mexico. J Trop Ecol 14:139–151. doi:10.1017/S0266467498000121 CrossRefGoogle Scholar
  34. Silvius KM, Fragoso JMV (2003) Red-rumped Agouti (Dasyprocta leporina) home range use in an Amazonian forest: implications for the aggregate distribution of the forest trees. Biotropica 35:74–83Google Scholar
  35. VanderWall SB (1990) Food hoarding by animals. The Chicago University Press, ChicagoGoogle Scholar
  36. Vormisto J (2002) Palms as rainforest resources: how evenly are they distributed in Peruvian Amazonia? Biodivers Conserv 11:1025–1045. doi:10.1023/A:1015873223350 CrossRefGoogle Scholar
  37. Wheelwright NT (1985) Fruit size, gape width, and the diets of fruit-eating birds. Ecology 66:808–818. doi:10.2307/1940542 CrossRefGoogle Scholar
  38. Wright SJ (2003) The myriad consequences of hunting for vertebrates and plants in tropical forests. Perspect Plant Ecol Evol Syst 6:73–86. doi:10.1078/1433-8319-00043 CrossRefGoogle Scholar

Copyright information

© The Ecological Society of Japan 2009

Authors and Affiliations

  • Camila I. Donatti
    • 1
  • Paulo R. GuimarãesJr.
    • 2
  • Mauro Galetti
    • 3
  1. 1.Department of BiologyStanford UniversityStanfordUSA
  2. 2.Departamento de Ecologia, Instituto de BiociênciasCP 11294 Universidade de São PauloSão PauloBrazil
  3. 3.Laboratório de Biologia da Conservação, Departamento de EcologiaUniversidade Estadual Paulista (UNESP)Rio ClaroBrazil

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