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

Firn, Jennifer; Moore, Joslin L.; MacDougall, Andrew S.; Borer, Elizabeth T.; Seabloom, Eric W.; HilleRisLambers, Janneke; Harpole, W. Stanley; Cleland, Elsa E.; Brown, Cynthia S.; Knops, Johannes M. H.; Prober, Suzanne M.; Pyke, David A.; Farrell, Kelly A.; Bakker, John D.; O’Halloran, Lydia R.; Adler, Peter B.; Collins, Scott L.; D’Antonio, Carla M.; Crawley, Michael J.; Wolkovich, Elizabeth M.; La Pierre, Kimberly J.; Melbourne, Brett A.; Hautier, Yann; Morgan, John W.; Leakey, Andrew D. B.; Kay, Adam; McCulley, Rebecca; Davies, Kendi F.; Stevens, Carly J.; Chu, Cheng-Jin; Holl, Karen D.; Klein, Julia A.; Fay, Philip A.; Hagenah, Nicole; Kirkman, Kevin P. and Buckley, Yvonne M. (2011). Abundance of introduced species at home predicts abundance away in herbaceous communities. Ecology Letters, 14(3) pp. 274–281.

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URL: http://dx.doi.org/10.1111/j.1461-0248.2010.01584.x
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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.

Item Type: Journal Article
Copyright Holders: 2011 Blackwell Publishing Ltd/CNRS
ISSN: 1461-0248
Keywords: biogeography; biosecurity; disturbance; global meta-study; homogenization of communities; invasion paradox; mechanisms of invasion; Nutrient Network; plant invasion; propagule pressure
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Item ID: 28872
Depositing User: Mairi Harding
Date Deposited: 01 Jun 2011 16:09
Last Modified: 27 Oct 2012 14:28
URI: http://oro.open.ac.uk/id/eprint/28872
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