Please use this identifier to cite or link to this item: http://hdl.handle.net/10125/23217

Plant Dispersal, Introduced Species, and Vegetation Change in the South Pacific Kingdom of Tonga.

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Title: Plant Dispersal, Introduced Species, and Vegetation Change in the South Pacific Kingdom of Tonga.
Authors: Fall, Patricia L.
Drezner,Taly Dawn
LC Subject Headings: Natural history--Periodicals.
Science--Periodicals
Natural history--Pacific Area--Periodicals.
Issue Date: Apr 2011
Publisher: Honolulu, University of Hawaii
Citation: Fall PL, Drezner TD. Plant Dispersal, Introduced Species, and Vegetation Change in the South Pacific Kingdom of Tonga. Pac Sci 65(2): 143-156.
Series/Report no.: vol. 65, no. 2
Abstract: Dispersal guilds hold key ecological implications for the vegetation history of islands. This study considers dispersal vectors in conjunction with species origin and growth form to characterize vegetation dynamics on the islands of Tonga in the South Pacific. Data for over 700 species compiled from published literature on the plants of Tonga support a comparative study of dispersal mechanisms and growth forms for native flora, species brought by Polynesian settlers, and taxa introduced since European contact. The indigenous flora, predominantly trees, is characterized primarily by endozoochorous (internal) dispersal through birds and bats. European introductions, primarily herbs, disperse commonly through epizoochorous (external) animal dispersal. Bat dispersal is most important for overstory indigenous and Polynesian trees and vines. In addition, rodents commonly eat seeds of native rain forest trees. The understory, which is overwhelmingly introduced, consists of wind-dispersed and externally animal-dispersed species, which are often early successional. Rain forest thinning encourages establishment of wind-dispersed species and nonnatives. Thus, the prospect of sustained native flora in Tonga would be enhanced by the preservation of bats, a particularly important dispersal vector for indigenous and endemic species, and by the eradication of introduced rats.
Description: v. ill. 23 cm.
Quarterly
Pages/Duration: 14 p.
URI/DOI: http://hdl.handle.net/10125/23217
ISSN: 0030-8870
Appears in Collections:Pacific Science, Volume 65, Number 2, 2011



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