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New and Historical Plant Introductions, and Potential Pests in the Juan Fernandez Islands, Chile

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Title:New and Historical Plant Introductions, and Potential Pests in the Juan Fernandez Islands, Chile
Authors:Swenson, Ulf
Stuessy, Tod F.
Baeza, Marcelo
Crawford, Daniel J.
Date Issued:Jul 1997
Publisher:University of Hawaii Press
Citation:Swenson U, Stuessy TF, Baeza M, Crawford DJ. 1997. New and historical plant introductions, and potential pests in the Juan Fernandez Islands, Chile. Pac Sci 51(3): 233-253.
Abstract:In 1935 the Juan Fernandez Islands in the Pacific Ocean were declared
a Chilean National Park to protect the unique flora and fauna, and later given status
as a Biosphere Reserve by IUCN. Exotic plants deliberately and inadvertently
introduced are threats to the natural vegetation. We review the introduced and/or
adventitious flora of the archipelago in this paper. We report 21 recent arrivals,
eight earlier introductions from the mid-1700s to the 1900s that have not been
recognized before in the flora, six misidentified taxa, and five taxa present earlier
but now reported from another island, resulting in a total of 227 introduced and
naturalized species. Each species is discussed briefly with its native distribution,
uses, first arrival in Chile and/or the archipelago, and comments on conservation
impact. Identities of some previously cited taxa are clarified (e.g., Cupressus macrocarpa
appears to be a misidentification for two other species of the same genus).
Other noxious weeds known worldwide have recently been deliberately introduced,
especially as garden ornamentals. Two of the most serious potential pests are the
bird-dispersed Lantana camara and Lonicera japonica. We recommend immediate
eradication of these two taxa and restriction on reintroduction. A conservation
program emphasizing strong physical and biological methods is urgently needed to
control the introduced species.
Appears in Collections: Pacific Science Volume 51, Number 3, 1997

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