Similar compositional turnover but distinct insular environmental and geographical drivers of native and exotic ants in two oceans

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dc.cibjournalJournal of Biogeographyen_ZA
dc.cibprojectNAen_ZA
dc.contributor.authorLatombe, G.
dc.contributor.authorRoura-Pascual, N.
dc.contributor.authorHui, C.
dc.date.accessioned2020-02-12T07:05:16Z
dc.date.accessioned2021-08-26T21:27:36Z
dc.date.available2020-02-12T07:05:16Z
dc.date.available2021-08-26T21:27:36Z
dc.date.issued2019
dc.description.abstractAim This study aims to quantify the patterns in compositional turnover of native and exotic ants on small islands in two oceans, and to explore whether such patterns are driven by similar environmental, geographical and potentially biotic variables. Location Pacific and Atlantic islands. Time period Present. Major taxa studied Ants. Methods We applied Multi‐Site Generalised Dissimilarity Modelling (MS‐GDM), which relates zeta diversity, the number of species shared by a given number of islands, to differences in environmental, geographical and biotic drivers. The use of zeta diversity enabled us to differentiate the contribution of rare species (shared by few islands) from those of widespread ones (shared by multiple islands) to compositional turnover. For completion, we also related species richness of insular ants per island with the same set of explanatory variables using Generalised Additive Models (GAM). Results Pacific and Atlantic islands have similar patterns of ant species turnover and richness, albeit partly driven by different drivers. Native and exotic species turnover are mostly explained by the same set of variables in the Pacific (annual precipitation and distance to the nearest island), but not in the Atlantic (annual precipitation is a good predictor of native species turnover, but none of the variables considered in our study explained exotic species turnover). No signal of biotic interactions was detected at the insular community level. Main conclusions Successful invasion strategies may depend on a combination of factors specific to the region in question. In the Pacific, milder environments and the absence of natives on certain islands enable exotic ants to select the same types of environment as native ants. In the harsher Atlantic Ocean, however, native ant species are likely to be well adapted to local environmental conditions, making it harder for exotics to become established. Exotic ant species, therefore, potentially rely on other attributes to establish, such as a combination of tolerance to a wide range of environmental conditions and human‐mediated colonization.en_ZA
dc.identifier.citationLatombe, G., Roura-Pascual, N. and Hui, C. (2019). Similar compositional turnover but distinct insular environmental and geographical drivers of native and exotic ants in two oceans. Journal of Biogeography 46, 2299-2310.en_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/118371
dc.language.isoenen_ZA
dc.subjectantsen_ZA
dc.subjectbiodiversityen_ZA
dc.subjectbiotic interactionsen_ZA
dc.subjectenvironmental filteringen_ZA
dc.subjectisland biogeographyen_ZA
dc.subjectisolation by distanceen_ZA
dc.subjectMulti-Site Generalised Dissimilarity Modellingen_ZA
dc.subjectspecies richnessen_ZA
dc.subjectspecies turnoveren_ZA
dc.subjectzeta diversityen_ZA
dc.titleSimilar compositional turnover but distinct insular environmental and geographical drivers of native and exotic ants in two oceansen_ZA
dc.typeJournalArticlesen_ZA
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