Skip to Main Content
Counting “exotics”Author(s): Qinfeng Guo
Source: NeoBiota 9:71-73
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
PDF: View PDF (783.6 KB)
DescriptionAn introduced or exotic species is commonly defined as an organism accidentally or intentionally introduced to a new location by human activity (Williamson 1996; Richardson et al. 2000; Guo and Ricklefs 2010). However, the counting of exotics is often inconsistent. For example, in the US, previously published plant richness data for each state are only those either native or exotic to the US (USDA and NRCS 2004), not actually to the state. Yet, within-country (e.g., among states, counties) species introductions which form “homegrown exotics” (Cox 1999) or “native invaders” (Simberloff 2011) are undoubtedly numerous. The growing human population and associated activity increase species introductions at all levels, both international and internal but to date intercontinental species introductions have always been the focus. Those species introduced among neighboring areas are often unnoticed but they are actually far more frequent due to the proximity and environmental similarities. Many domestic exotic plant species exhibit high invasiveness such as Spartina alterniflora (smooth cordgrass; introduced from the east coast to California) and Molothrus ater (brown-headed cowbird; introduced from the Great Plains to California).
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGuo, Q.F. 2011. Counting "exotics". NeoBiota 9:71-73.
- Sonneratia apetala Buch. Ham in the mangrove ecosystems of China: An invasive species or restoration species?
- Mangrove expansion into salt marshes alters associated faunal communities
- Community structure and abundance of benthic infaunal invertebrates in Maine fringing marsh ecosystems
XML: View XML