Avian dispersal of exotic shrubs in an archipelago

Bennett, Joseph R., Young, Emily J., Giblin, David E., Dunwiddie, Peter W. and Arcese, Peter (2011) Avian dispersal of exotic shrubs in an archipelago. Ecoscience, 18 4: 369-374. doi:10.2980/18-4-3423


Author Bennett, Joseph R.
Young, Emily J.
Giblin, David E.
Dunwiddie, Peter W.
Arcese, Peter
Title Avian dispersal of exotic shrubs in an archipelago
Journal name Ecoscience   Check publisher's open access policy
ISSN 1195-6860
Publication date 2011-12-01
Sub-type Article (original research)
DOI 10.2980/18-4-3423
Volume 18
Issue 4
Start page 369
End page 374
Total pages 6
Place of publication Sainte-Foy, Canada
Publisher Universite Laval
Language eng
Formatted abstract
The distribution of exotic species bearing fruits may depend in part on their palatability to birds, because species attracting a more diverse array of dispersers should broadcast seed to a wider range of habitats, including those otherwise assumed to represent refuges from exotic species invasion, such as small islands. To test these ideas, we compared the palatability of 11 exotic shrub species to their occurrence on 91 islands of varying size and isolation in the Gulf Islands of British Columbia, Canada and the San Juan Islands of Washington, USA. The estimated palatability of fruits for 10 common frugivorous birds was positively related to the number of islands on which they occurred. Rubus armeniacus and R. laciniatus were the most widely consumed exotic species and the only such species prevalent on small islands, suggesting that they have benefited by attracting a wide array of frugivores that have, in turn, facilitated their rapid colonization of the region. Our results suggest that protecting small islands from human visitation will be insufficient to prevent exotic species establishment and the loss of native biodiversity.
Keyword Exotic species
Frugivory
Invasion success
Islands
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Tue, 17 Jul 2012, 20:32:11 EST by Joseph Bennett on behalf of School of Biological Sciences