Interactions among multiple invasive animals

Show simple item record Jackson, Michelle C. 2015-08-28T08:47:30Z 2015-08-28T08:47:30Z 2015
dc.description Appendices A and B are available online: en_ZA
dc.description.abstract With accelerating rates of invasion being documented in many ecosystems, communities of interacting invasive species are becoming increasingly common. Opposing theories predict that invaders can either hinder or promote one another’s success. Additionally, evidence suggests that co-occurring invaders can interact to amplify or mitigate one another’s impacts on ecosystems. However, there has not been a quantitative review on interactions among multiple invasive animals. Here I use a meta-analysis approach to show that, across a global scale, the mean interaction among invaders was to reduce one another’s performance. This pattern was consistent when considering interactions between marine animals but interactions were neutral overall in terrestrial and freshwater ecosystems. Crucially, individual studies showed that neutral interactions were the most common interaction type. Further, I demonstrate that the combined ecological impacts of multiple invaders were frequently the sum of their independent effects (additive) but the mean effect was non-additive and less than predicted (antagonistic). In both meta-analyses, the disparity between the most frequent and mean interaction type indicates that case studies of multiple invasions commonly have different outcomes to global trends. These results will help predict how co-occurring invasive animals interact and assist in developing management strategies for problematic invaders in our changing world. en_ZA
dc.description.librarian am2015 en_ZA
dc.description.uri en_ZA
dc.identifier.citation Jackson, MC 2015, 'Interactions among multiple invasive animals', Ecology, vol. 96, no. 8, pp. 2035-2041. en_ZA
dc.identifier.issn 0012-9658 (print)
dc.identifier.issn 1939-9170 (online)
dc.identifier.other 10.1890/
dc.language.iso en en_ZA
dc.publisher Ecological Society of America en_ZA
dc.rights © 2015 by the Ecological Society of America en_ZA
dc.subject Biotic resistance en_ZA
dc.subject Invasional meltdown en_ZA
dc.subject Invasive species en_ZA
dc.subject Meta-analyses en_ZA
dc.subject Multiple invasions en_ZA
dc.subject Non-additive effects en_ZA
dc.subject Species interactions en_ZA
dc.title Interactions among multiple invasive animals en_ZA
dc.type Article en_ZA

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