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Post-dispersal seed removal by rodents in Ranomafana rain forest, Madagascar

Published online by Cambridge University Press:  24 April 2017

Onja H. Razafindratsima
Onja H. Razafindratsima*
Affiliation:
Department of BioSciences, Rice University, 6100 Main St, Houston, TX 77005, USA
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Abstract:

Seed-consuming rodents are increasingly recognized for their roles in the maintenance of tree species diversity, by acting on crucial post seed-dispersal processes. Yet, studies examining the extent to which rodents may act as secondary seed dispersers and/or predators in Madagascar's forests are limited. Thread-marking seed experiments were run to address this, using the seeds of two native large-seeded, frugivore-dispersed tree species (Abrahamia thouvenotii and Cryptocarya crassifolia), in disturbed and less-disturbed habitats in the rain forests of Ranomafana National Park, during the dry season. Data show that post-dispersal handling of seeds by rodents (predation and removal) was significantly lower in disturbed than in less-disturbed habitats (1.31–3.78 times lower; n = 2200). Also, seeds were more likely to be predated or left on the forest ground after removal than being larder- or scatter-hoarded: 27–78% of the removed seeds were found on the ground, <12% found in burrows and there was no evidence of scatter-hoarding (n = 132). Based on pictures from camera traps, the native rodent species, Nesomys rufus, was potentially responsible for seed predation and/or removal in the less-disturbed habitat; but no indication of the rodent species active in the disturbed habitat was obtained. The lack of scatter-hoarding suggests a limited role of rodents in secondary seed dispersal in this system. These findings form a preliminary account of the potential roles of rodents in post seed-dispersal processes in Madagascar's forests, but this warrants further study.

Keywords

Abrahamia thouvenotiiCryptocarya crassifoliaforest regenerationfrugivoresNesomys rufuspost-dispersal processessecondary seed dispersalseed predationtropical forest
Type
Short Communication
Information
Journal of Tropical Ecology , Volume 33 , Issue 3 , May 2017 , pp. 232 - 236
Copyright
Copyright © Cambridge University Press 2017 

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References

LITERATURE CITED

BLACKHAM, G. V. & CORLETT, R. T. 2015. Post-dispersal seed removal by ground-feeding rodents in tropical peatlands, Central Kalimantan, Indonesia. Scientific Reports 5:14152.Google Scholar
CARVAJAL, A. & ADLER, G. H. 2008. Seed dispersal and predation by Proechimys semispinosus and Sciurus granatensis in gaps and understorey in central Panama. Journal of Tropical Ecology 24:485–492.CrossRefGoogle Scholar
DITTEL, J. W., LAMBERT, T. D. & ADLER, G. H. 2015. Seed dispersal by rodents in a lowland forest in central Panama. Journal of Tropical Ecology 31:403–412.Google Scholar
DUNHAM, A. E. 2011. Soil disturbance by vertebrates alters seed predation, movement and germination in an African rain forest. Journal of Tropical Ecology 27:581–589.Google Scholar
DUNHAM, A. E., ERHART, E. M. & WRIGHT, P. C. 2011. Global climate cycles and cyclones: consequences for rainfall patterns and lemur reproduction in southeastern Madagascar. Global Change Biology 17:219–227.Google Scholar
FORGET, P.-M. 1990. Seed-dispersal of Vouacapoua americana (Caesalpiniaceae) by caviomorph rodents in French Guiana. Journal of Tropical Ecology 6:459–468.Google Scholar
FORGET, P. & CUIJPERS, L. 2008. Survival and scatterhoarding of frugivore-dispersed seeds as a function of forest disturbance. Biotropica 40:380–385.Google Scholar
FORGET, P.-M., HAMMOND, D. S., MILLERON, T. & THOMAS, R. 2002. Seasonality of fruiting and food hoarding by rodents in Neotropical forests: consequences for seed dispersal and seedling recruitment. Pp. 241–256 in Levey, D. J., Silva, W. R. & Galetti, M. (eds), Seed dispersal and frugivory: ecology, evolution, and conservation. CABI, Wallingford.Google Scholar
GARBUTT, N. 2007. Mammals of Madagascar: a complete guide. Yale University Press, New Haven. 304 pp.Google Scholar
GERBER, B., KARPANTY, S. M., CRAWFORD, C., KOTSCHWAR, M. & RANDRIANANTENAINA, J. 2010. An assessment of carnivore relative abundance and density in the eastern rainforests of Madagascar using remotely-triggered camera traps. Oryx 44:219–222.CrossRefGoogle Scholar
GOODMAN, S. M. 1994. A description of the ground burrow of Eliurus webbi (Nesomyinae) and case of cohabitation with an endemic bird (Brachypteraciidae, Brachypteracias). Mammalia 58:670–672.Google Scholar
GOODMAN, S. M. & STERLING, E. J. 1996. The utilisation of Canarium (Burseraceae) seeds by vertebrates in the Reserve Naturelle Integrale d'Andringitra, Madagascar. Fieldiana Zoology 85:83–89.Google Scholar
HULME, P. E. & BENKMAN, C. W. 2002. Granivory. Pp. 132–54 in Herrera, C. M. & Pellmyr, O. (eds), Plant–animal interactions: an evolutionary approach. Blackwell Science, Oxford.Google Scholar
JANSEN, P. A., BARTHOLOMEUS, M., BONGERS, F., ELZINGA, J. A., DEN OUDEN, J. & VAN WIEREN, S. E. 2002. The role of seed size in dispersal by a scatter-hoarding rodent. Pp. 209–226 in Levey, D. J., Silva, W. R. & Galetti, M. (eds), Seed dispersal and frugivory: ecology, evolution, and conservation. CAB International, New York.Google Scholar
LEHTONEN, J. T., MUSTONEN, O., RAMIARINJANAHARY, H., NIEMELÄ, J. & RITA, H. 2001. Habitat use by endemic and introduced rodents along a gradient of forest disturbance in Madagascar. Biodiversity and Conservation 10:1185–1202.Google Scholar
RAZAFINDRATSIMA, O. H. & DUNHAM, A. E. 2016. Co-fruiting plant species share similar fruit and seed traits while phylogenetic patterns vary through time. Journal of Ecology 104:1789.CrossRefGoogle Scholar
RAZAFINDRATSIMA, O. H., JONES, T. A. & DUNHAM, A. E. 2014. Patterns of movement and seed dispersal by three lemur species. American Journal of Primatology 76:84–96.Google Scholar
VALLEJO-MARÍN, M., DOMÍNGUEZ, C. A. & DIRZO, R. 2006. Simulated seed predation reveals a variety of germination responses of neotropical rain forest species. American Journal of Botany 93:369–376.Google Scholar
WENNY, D. G. 2000. Seed dispersal, seed predation, and seedling recruitment of a neotropical montane tree. Ecological Monographs 70:331–351.Google Scholar
WILSON, D. J., WRIGHT, E. F., CANHAM, C. D. & RUSCOE, W. A. 2007. Neighbourhood analyses of tree seed predation by introduced rodents in a New Zealand temperate rainforest. Ecography 30:105–119.Google Scholar