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The Asian elephant is amongst the top three frugivores of two tree species with easily edible fruit

Published online by Cambridge University Press:  29 July 2015

Nitin Sekar  and
Raman Sukumar
Nitin Sekar*
Affiliation:
Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA08540 Center for Ecological Sciences, Indian Institute of Science, Bangalore, India560012
Raman Sukumar
Affiliation:
Center for Ecological Sciences, Indian Institute of Science, Bangalore, India560012
*
1Corresponding author. Email: nitin.sekar@gmail.com
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Abstract:

Large animal species are prone to local extirpation, but ecologists cannot yet predict how the loss of megaherbivores affects ecosystem processes such as seed dispersal. Few studies have compared the quantity and quality of seed dispersal by megaherbivores versus alternative frugivores in the wild, particularly for plant species with fruit easily consumed by many frugivorous species. In a disturbed tropical moist forest in India, we examine whether megaherbivores are a major frugivore of two tree species with easily edible, mammal-dispersed fruit. We quantify the relative fruit removal rates of Artocarpus chaplasha and Careya arborea, by the Asian elephant (Elephas maximus) and alternative dispersers. Through focal watches and camera trapping, we found the elephant to be amongst the top three frugivores for each tree species. Furthermore, seed transects under A. chaplasha show that arboreal frugivores discard seeds only a short distance from the parental tree, underscoring the elephant's role as a long-distance disperser. Our data provide unprecedented support for an old notion: megaherbivores may be key dispersers for a broad set of mammal-dispersed fruiting species, and not just fruit inaccessible to smaller frugivores. As such, the elephant may be particularly important for the functional ecology of the disturbed forests it still inhabits across tropical Asia.

Keywords

Artocarpus chaplashaBuxa Tiger ReserveCareya arboreadomestic bovidsfrugivoryElephas maximusfunctional ecologyMacaca mulattarhesus macaques
Type
Research Article
Information
Journal of Tropical Ecology , Volume 31 , Issue 5 , September 2015 , pp. 385 - 394
Copyright
Copyright © Cambridge University Press 2015 

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References

LITERATURE CITED

BLAKE, S., DEEM, S.L., MOSSIMBO, E., MAISELS, F. & WALSH, P. 2009. Forest elephants: tree planters of the Congo. Biotropica 41:459–468.CrossRefGoogle Scholar
CAMPOS-ARCEIZ, A. & BLAKE, S. 2011. Megagardeners of the forest – the role of elephants in seed dispersal. Acta Oecologia 37:542–553.CrossRefGoogle Scholar
CAMPOS-ARCEIZ, A., LARRINAGA, A.R., WEERASINGHE, U.R., TAKATSUKI, S., PASTORINI, J., LEIMGRUBER, P., FERNANDO, P. & SANTAMARIA, L. 2008. Behavior rather than diet mediates seasonal differences in seed dispersal by Asian elephants. Ecology 89:2684–2691.CrossRefGoogle ScholarPubMed
COCHRANE, E. P. 2003. The need to be eaten: Balanites wilsoniana with and without elephant seed-dispersal. Journal of Tropical Ecology 19:579–589.CrossRefGoogle Scholar
CORLETT, R. T. 1998. Frugivory and seed dispersal by vertebrates in the Oriental (Indomalayan) region. Biological Reviews 73:413–448.CrossRefGoogle ScholarPubMed
CORLETT, R. T. 2007. The impact of hunting on the mammalian fauna of tropical Asian forests. Biotropica 39:292–303.CrossRefGoogle Scholar
CORLETT, R. T. 2009. Seed dispersal distances and plant migration potential in tropical East Asia. Biotropica 41:592–598.CrossRefGoogle Scholar
CORLETT, R. T. 2013. The shifted baseline: prehistoric defaunation in the tropics and its consequences for biodiversity conservation. Biological Conservation 163:13–21.CrossRefGoogle Scholar
CORLETT, R. & LUCAS, P. 1990. Alternative seed-handling strategies in primates: seed-spitting by long-tailed macaques (Macaca fascicularis). Oecologia 82:166–171.CrossRefGoogle ScholarPubMed
DATTA, A. & RAWAT, G. S. 2008. Dispersal modes and spatial patterns of tree species in a tropical forest in Arunachal Pradesh, northeast India. Tropical Conservation Science 1:163–185.CrossRefGoogle Scholar
DAVISON, A. C. & HINKLEY, D. V. 1997. Bootstrap methods and their application. Cambridge University Press, New York. 594 pp.CrossRefGoogle Scholar
DENNIS, A. J. & WESTCOTT, D. A. 2006. Reducing complexity when studying seed dispersal at community scales: a functional classification of vertebrate seed dispersers in tropical forests. Oecologia 149:620–634.CrossRefGoogle Scholar
DINERSTEIN, E. 2003. The return of the unicorns: the natural history and conservation of the one-horned rhinoceros. Columbia University Press, New York. 384 pp.CrossRefGoogle Scholar
GUIMARãES, P. R., GALETTI, M. & JORDANO, P. 2008. Seed dispersal anachronisms: rethinking the fruit extinct megafauna ate. PLoS ONE 3 (3): e1745.CrossRefGoogle ScholarPubMed
HANSEN, D. M. & GALETTI, M. 2009. The forgotten megafauna. Science 324:42–43.CrossRefGoogle ScholarPubMed
JANZEN, D. H. & MARTIN, P. S. 1982. Neotropical anachronisms: the fruit the gomphotheres ate. Science 215:19–27.CrossRefGoogle ScholarPubMed
JORDANO, P. & SCHUPP, E. W. 2000. Seed disperser effectiveness: the quantity component and patterns of seed rain for Prunus mahaleb. Ecological Monographs 70:591–615.CrossRefGoogle Scholar
KITAMURA, S., YUMOTO, T., POONSWAD, P., CHUAILUA, P., PLONGMAI, K., MARUHASHI, T. & NOMA, N. 2002. Interactions between fleshy fruit and frugivores in a tropical seasonal forest in Thailand. Oecologia 133:559–572.CrossRefGoogle Scholar
KITAMURA, S., SUZUKI, S., YUMOTO, T., POONSWAD, P., CHUAILUA, P., PLONGMAI, K., NOMA, N., MARUHASHI, T. & SUCKASAM, C. 2004. Dispersal of Aglaia spectabilis, a large-seeded tree species in a moist evergreen forest in Thailand. Journal of Tropical Ecology 20:421–427.CrossRefGoogle Scholar
KITAMURA, S., SUZUKI, S., YUMOTO, T., CHUAILUA, P., PLONGMAI, K., POONSWAD, P., NOMA, N., MARUHASHI, T. & SUCKASAM, C. 2005. A botanical inventory of a tropical seasonal forest in Khao Yai National Park, Thailand: implications for fruit–frugivore interactions. Biodiversity and Conservation 14:1241–1262.CrossRefGoogle Scholar
KITAMURA, S., SUZUKI, S., YUMOTO, T., POONSWAD, P., CHUAILUA, P., PLONGMAI, K., MARUHASHI, T., NOMA, N. & SUCKASAM, C. 2006. Dispersal of Canarium euphyllum (Burseraceae), a large-seeded tree species, in a moist evergreen forest in Thailand. Journal of Tropical Ecology 22:137–146.CrossRefGoogle Scholar
KITAMURA, S., YUMOTO, T., POONSWAD, P. & WOHANDEE, P. 2007. Frugivory and seed dispersal by Asian elephants, Elephas maximus, in a moist evergreen forest of Thailand. Journal of Tropical Ecology 23:373–376.CrossRefGoogle Scholar
MABBERLEY, D. J. 1997. The plant-book: a portable dictionary of the vascular plants. Cambridge University Press, New York. 1040 pp.Google Scholar
MACNAE, W. & FOSBERG, F.R. 1981. Lecythidaceae. Pp. 195–202 in Dassanayake, M. D. (ed). A Revised Handbook to the Flora of Ceylon, Volume III. A. A. Balkeme, Rotterdam.Google Scholar
MCCONKEY, K. R. & BROCKELMAN, W. Y. 2011. Nonredundancy in the dispersal network of a generalist tropical forest tree. Ecology 92:1492–1502.CrossRefGoogle ScholarPubMed
MENON, V. 2009. Mammals of India. PrincetonUniversity Press, Princeton. 201 pp.Google Scholar
NAEEM, S. & LI, S. 1997. Biodiversity enhances ecosystem reliability. Nature 390:507–509.CrossRefGoogle Scholar
NAKASHIMA, Y., LAGAN, P. & KITAYAMA, K. 2007. A study of fruit–frugivore interactions in two species of durian (Durio, Bombacaceae) in Sabah, Malaysia. Biotropica 12:164–258.Google Scholar
OWEN-SMITH, R. N. 1988. Megaherbivores: the influence of very large body size on ecology. Cambridge University Press, New York. 388 pp.CrossRefGoogle Scholar
PLUMMER, M. 2003. JAGS: A program for analysis of Bayesian graphical models using Gibbs sampling. in Hornik, K., Leisch, F. & Zeileis, A. (ed). Proceedings of the 3rd International Workshop on Distributed Statistical Computing, March. Technische Universität Wien, Vienna pp. 20–22.Google Scholar
PRASAD, S. & SUKUMAR, R. 2010. Context-dependency of a complex fruit-frugivore mutualism: temporal variation in crop size and neighborhood effects. Oikos 119:514–523.CrossRefGoogle Scholar
PRASAD, S., PITTET, A. & SUKUMAR, R. 2010. Who really ate the fruit? A novel approach to camera trapping for quantifying frugivory by ruminants. Ecological Research 25:225–231.CrossRefGoogle Scholar
RUSSO, S. E., PORTNOV, S. & AUGSPURGER, C. K. 2006. Incorporating animal behavior into seed dispersal models: implications for seed shadows. Ecology 87:3160–3174.CrossRefGoogle ScholarPubMed
SAHNI, K. C. 1998. The book of Indian trees. USA: Oxford University Press. 260 pp.Google Scholar
SEKAR, N. & SUKUMAR, R. 2013. Waiting for Gajah: an elephant mutualist's contingency plan for an endangered megafaunal disperser. Journal of Ecology 101:1379–1388.CrossRefGoogle Scholar
SEKAR, N., LEE, C. & SUKUMAR, R. In press. In the elephant's seed shadow: the prospects of domestic bovids as replacement dispersers of three tropical Asian trees. Ecology.Google Scholar
SKARPE, C., AARRESTAD, P. A., ANDREASSEN, H. P., DHILLION, S. S., DIMAKATSO, T., DU TOIT, J. T., DUNCAN, HALLEY, J., HYTTEBORN, H., MAKHABU, S., MARI, M., MAROKANE, W., MASUNGA, G., MODISE, D., MOE, S. R., MOJAPHOKO, R., MOSUGELO, D., MOTSUMI, S., NEO-MAHUPELENG, G., RAMOTADIMA, M., RUTINA, L., SECHELE, L., SEJOE, T. B., STOKKE, S., SWENSON, J. E., TAOLO, C., VANDEWALLE, M. & WEGGE, P. 2004. The return of the giants: ecological effects of an increasing elephant population. Ambio 33:276–282.CrossRefGoogle ScholarPubMed
STEVENSON, P., PINEDA, M. & SAMPER, T. 2005. Influence of seed size on dispersal patterns of woolly monkeys (Lagothrix lagothricha) at Tinigua Park, Colombia. Oikos 3:435–440.CrossRefGoogle Scholar
SUKUMAR, R. 2003. The living elephants: evolutionary ecology, behavior, and conservation. Chennai: Oxford University Press. 478 pp.CrossRefGoogle Scholar
SUNDARAPANDIAN, S. M., CHANDRASEKARAN, S. & SWAMY, P. S. 2005. Phenological behaviour of selected tree species in tropical forests at Kodayar in the Western Ghats, Tamil Nadu, India. Current Science 88:805–810.Google Scholar
TCHAMBA, M. N. & SEME, P. M. 1993. Diet and feeding behaviour of the forest elephant in the Santchou Reserve, Cameroon. African Journal of Ecology 31:165–171.CrossRefGoogle Scholar