Potential Asteraceae Invaders in Taiwan: Insights from the Flora and Herbarium Records of Casual and Naturalized Alien Species
Resource
Taiwania,50(一)
Journal
Taiwania
Journal Volume
50
Journal Issue
一
Pages
-
Date Issued
2005
Date
2005
Author(s)
吳姍樺
王相華
DOI
246246/2006121215550977
Abstract
Naturalization has been shown to be one of the primary stages of plant invasions;
therefore, studies on naturalized plant species may generate valuable insights of possible invaders and
invasions. Background information of casual and naturalized Asteraceae species provided by a
comprehensive list of casual and naturalized species in Taiwan was examined to estimate the basic
biological traits and geological origins of potential invasive species in this study. Besides, herbarium
records were collected and analyzed to predict the invasiveness of casual and naturalized Asteraceae
species. Our results showed that 44.0% out of the 51 casual and naturalized Asteraceae species were
classified as invasive in the field, and a notable portion of these species were probably introduced
accidently. Tropical Americas were the most important origins of casual and naturalized Asteraceae
species, followed by Europe and temperate Americas. Most of the casual and naturalized Asteraceae
species were annual herbs, and a few perennial species categorized as invasive may cause profound
environmental problems. The herbarium record showed that species possessed different numbers of
localities within the same time frame. We suggested that casual and naturalized Asteraceae species
collected in more localities are more invasive than those species found in fewer localities within the
same period of time.
Subjects
Invasion
Taiwan
Asteraceae
alien species
casual and naturalized species
herbarium records
Publisher
臺北市：國立台灣大學生態學與演化生物學研究所
Type
other
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