Show simple item record

dc.contributor.authorDuncan, Richard P.en
dc.date.accessioned2008-05-27T04:49:53Z
dc.date.issued1997-05en
dc.identifier.citationDuncan, R. P. (1997). The role of competition and introduction effort in the success of passeriform birds introduced to New Zealand. The American Naturalist, 149(5), 903-915.en
dc.identifier.issn0003-0147en
dc.identifier.urihttps://hdl.handle.net/10182/507
dc.description.abstractThe finding that passeriform birds introduced to the islands of Hawaii and Saint Helena were more likely to successfully invade when fewer other introduced species were present has been interpreted as strong support for the hypothesis that interspecific competition influences invasion success. I tested whether invasions were more likely to succeed when fewer species were present using the records of passeriform birds introduced to four acclimatization districts in New Zealand. I also tested whether introduction effort, measured as the number of introductions and the total number of birds released, could predict invasion outcomes, a result previously established for all birds introduced to New Zealand. I found patterns consistent with both competition and introduction effort as explanations for invasion success. However, data supporting the two explanations were confounded such that the greater success of invaders arriving when fewer other species were present could have been due to a causal relationship between invasion success and introduction effort. Hence, without data on introduction effort, previous studies may have overestimated the degree to which the number of potential competitors could independently explain invasion outcomes and may therefore have overstated the importance of competition in structuring introduced avian assemblages. Furthermore, I suggest that a second pattern in avian invasion success previously attributed to competition, the morphological overdispersion of successful invaders, could also arise as an artifact of variation in introduction effort.en
dc.format.extent903-915en
dc.language.isoenen
dc.publisherThe University of Chicago Press for The American Society of Naturalistsen
dc.relationThe original publication is available from - The University of Chicago Press for The American Society of Naturalists - https://doi.org/10.1086/286029 - http://hdl.handle.net/10182/507en
dc.relation.urihttps://doi.org/10.1086/286029en
dc.rightsCopyright © 1997 by The University of Chicagoen
dc.subjectbiological invasionsen
dc.subjectbird introductionsen
dc.subjectNew Zealanden
dc.subjectpasseriform birdsen
dc.subjectinterspecific competitionen
dc.subjectintroduction efforten
dc.subjectEcologyen
dc.titleThe role of competition and introduction effort in the success of passeriform birds introduced to New Zealanden
dc.typeJournal Article
dc.subject.marsdenFields of Research::270000 Biological Sciences::270700 Ecology and Evolution::270703 Terrestrial ecologyen
lu.contributor.unitLincoln Universityen
lu.contributor.unitBio-Protection Research Centreen
dc.identifier.doi10.1086/286029en
dc.subject.anzsrc06 Biological Sciencesen
dc.relation.isPartOfThe American Naturalisten
pubs.issue5en
pubs.organisational-group/LU
pubs.organisational-group/LU/BPRC
pubs.publication-statusPublisheden
pubs.publisher-urlhttp://hdl.handle.net/10182/507en
pubs.volume149en


Files in this item

Default Thumbnail

This item appears in the following Collection(s)

Show simple item record