https://scholars.lib.ntu.edu.tw/handle/123456789/140976
Title: | 菊科外來歸化植物之入侵性初步探討 Potential Asteraceae Invaders in Taiwan: Insights from the Flora and Herbarium Records of Casual and Naturalized Alien Species |
Authors: | 吳姍樺 王相華 |
Keywords: | Invasion;Taiwan;Asteraceae;alien species;casual and naturalized species;herbarium records | Issue Date: | 2005 | Publisher: | 臺北市:國立台灣大學生態學與演化生物學研究所 | Journal Volume: | 50 | Journal Issue: | 一 | Start page/Pages: | - | Source: | Taiwania | 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. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006121215550977 | Other Identifiers: | 246246/2006121215550977 |
Appears in Collections: | 生態學與演化生物學研究所 |
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