Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Propagule pressure as a driver of establishment success in deliberately introduced exotic species: fact or artefact?
Author: Blackburn, T.
Prowse, T.
Lockwood, J.
Cassey, P.
Citation: Biological Invasions, 2013; 15(7):1459-1469
Publisher: Springer Netherlands
Issue Date: 2013
ISSN: 1387-3547
Statement of
Tim M. Blackburn, Thomas A.A. Prowse, Julie L. Lockwood and Phillip Casey
Abstract: A central paradigm in invasion biology is that more releases of higher numbers of individuals increase the likelihood that an exotic population successfully establishes and persists. Recently, however, it has been suggested that, in cases where the data are sourced from historical records of purposefully released species, the direction of causality is reversed, and that initial success leads to higher numbers being released. Here, we explore the implications of this alternative hypothesis, and derive six a priori predictions from it. We test these predictions using data on Acclimatization Society introductions of passerine bird species to New Zealand, which have previously been used to support both hypotheses for the direction of causality. All our predictions are falsified. This study reaffirms that the conventional paradigm in invasion biology is indeed the correct one for New Zealand passerine bird introductions, for which numbers released determine establishment success. Our predictions are not restricted to this fauna, however, and we keenly anticipate their application to other suitable datasets.
Keywords: Acclimatization Society
establishment success
New Zealand
Passerine birds
propagule pressure
Rights: © Springer Science+Business Media Dordrecht 2013
DOI: 10.1007/s10530-013-0451-x
Appears in Collections:Aurora harvest 4
Earth and Environmental Sciences publications
Environment Institute publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.