Abundance of introduced species at home predicts abundance away in herbaceous communities

Ecology Letters
By: , and 

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Abstract

Many ecosystems worldwide are dominated by introduced plant species, leading to loss of biodiversity and ecosystem function. A common but rarely tested assumption is that these plants are more abundant in introduced vs. native communities, because ecological or evolutionary-based shifts in populations underlie invasion success. Here, data for 26 herbaceous species at 39 sites, within eight countries, revealed that species abundances were similar at native (home) and introduced (away) sites - grass species were generally abundant home and away, while forbs were low in abundance, but more abundant at home. Sites with six or more of these species had similar community abundance hierarchies, suggesting that suites of introduced species are assembling similarly on different continents. Overall, we found that substantial changes to populations are not necessarily a pre-condition for invasion success and that increases in species abundance are unusual. Instead, abundance at home predicts abundance away, a potentially useful additional criterion for biosecurity programmes.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Abundance of introduced species at home predicts abundance away in herbaceous communities
Series title Ecology Letters
DOI 10.1111/j.1461-0248.2010.01584.x
Volume 14
Issue 3
Year Published 2011
Language English
Publisher Wiley-Blackwell
Publisher location Malden, MA
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description 8 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Ecology Letters
First page 274
Last page 281
Country United States