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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/19240
Title: Rare seed-predating mammals determine seed fate of Canarium euphyllum, a large-seeded tree species in a moist evergreen forest, Thailand
Authors: Shumpei Kitamura
Takakazu Yumoto
Pilai Poonswad
Shunsuke Suzuki
Prawat Wohandee
Kyoto University
Mahidol University
National Institutes for the Humanities, Research Institute for Humanity and Nature
University of Shiga Prefecture
National Park, Wildlife and Plant Conservation Department, Thailand
Rikkyo University
Keywords: Environmental Science
Issue Date: 1-Jan-2008
Citation: Ecological Research. Vol.23, No.1 (2008), 169-177
Abstract: Natural seed deposition patterns and their effects on post-dispersal seed fate are critical to tropical tree recruitment. The major dispersal agents of the large-seeded tree Canarium euphyllum in Khao Yai National Park, Thailand, are large frugivorous birds such as hornbills, which generated spatially heterogeneous seed deposition patterns because they regurgitated seeds at perching trees and conspecific and heterospecific feeding trees. We investigated the fate of seeds dispersed in this manner using seed removal experiments and automatic camera trapping. Seeds placed experimentally around conspecific feeding trees had higher removal rates than seeds placed elsewhere. These effects were likely mediated by two seed-eating rodents, the Indochinese ground squirrel (Menetes berdmorei) and the giant long-tailed rat (Leopoldamys sabanus). Consequently, the spatial patterns generated by hornbills had consequences for post-dispersal seed fates, particularly whether or not the seeds were removed by rodents. Primary dispersal by hornbills does alter seed fate by altering the probability of rodent-seed interaction, but the ultimate impact of dispersal by hornbills will depend on how important rodent scatterhoarding is to seed germination and seedlings. Given that major seed dispersers of C. euphyllum are now absent or rare in degraded forests in tropical Asia, it is becoming increasingly important to understand the roles of scatterhoarding rodents in these altered habitats in this region. © 2007 The Ecological Society of Japan.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=38149021502&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/19240
ISSN: 14401703
09123814
Appears in Collections:Scopus 2006-2010

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