Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 432145
Title Directed seed dispersal towards areas with low conspecific tree density by a scatter-hoarding rodent
Author(s) Hirsch, B.T.; Kays, R.; Pereira, V.E.; Jansen, P.A.
Source Ecology Letters 15 (2012)12. - ISSN 1461-023X - p. 1423 - 1429.
Department(s) Forest Ecology and Forest Management
Resource Ecology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) chipmunks tamias-amoenus - tropical forests - spatial-patterns - dependent survival - cache protection - fox squirrels - recruitment - pilferage - abundance - ecology
Abstract Scatter-hoarding animals spread out cached seeds to reduce density-dependent theft of their food reserves. This behaviour could lead to directed dispersal into areas with lower densities of conspecific trees, where seed and seedling survival are higher, and could profoundly affect the spatial structure of plant communities. We tested this hypothesis with Central American agoutis and Astrocaryum standleyanum palm seeds on Barro Colorado Island, Panama. We radio-tracked seeds as they were cached and re-cached by agoutis, calculated the density of adult Astrocaryum trees surrounding each cache, and tested whether the observed number of trees around seed caches declined more than expected under random dispersal. Seedling establishment success was negatively dependent on seed density, and agoutis carried seeds towards locations with lower conspecific tree densities, thus facilitating the escape of seeds from natural enemies. This behaviour may be a widespread mechanism leading to highly effective seed dispersal by scatter-hoarding animals.
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