Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 115, Issue 37, Pages 9270-9275Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1804179115
Keywords
island biogeography; alien species; isolation; island invasibility; naturalization
Categories
Funding
- Austrian Science Foundation FWF [I2086-B16]
- Deutsche Forschungsgemeinschaft [KL 1866/9-1, SE 1891/2-1]
- Czech Science Foundation (Centre of Excellence for Plant Diversity Analysis and Synthesis
- PLADIAS) [14-36079G]
- Czech Academy of Sciences (Long-Term Research Development Project) [RVO 67985939]
- Praemium Academiae Award from The Czech Academy of Sciences
- Fundo Europeu de Desenvolvimento Regional (FEDER) funds through the Operational Competitiveness Factors Programme COMPETE
- National Funds through the Foundation for Science and Technology (FCT) [PTDC/AAG-GLO/0463/2014-POCI-01-0145-FEDER-016583]
- Japan Society for the Promotion of Science (JSPS) KAKENHI Grant [17K15180]
- Young Investigator Award of the Faculty of Life Sciences, University of Vienna, Austria Investigator Award of the Faculty of Life Sciences, University of Vienna, Austria. Pictograms were derived from the PhyloPic website (www.phylopic.org). No changes were
- [FZT 118]
- Austrian Science Fund (FWF) [I2086] Funding Source: Austrian Science Fund (FWF)
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One of the best-known general patterns in island biogeography is the species isolation relationship (SIR), a decrease in the number of native species with increasing island isolation that is linked to lower rates of natural dispersal and colonization on remote oceanic islands. However, during recent centuries, the anthropogenic introduction of alien species has increasingly gained importance and altered the composition and richness of island species pools. We analyzed a large dataset for alien and native plants, ants, reptiles, mammals, and birds on 257 (sub) tropical islands, and showed that, except for birds, the number of naturalized alien species increases with isolation for all taxa, a pattern that is opposite to the negative SIR of native species. We argue that the reversal of the SIR for alien species is driven by an increase in island invasibility due to reduced diversity and increased ecological naivete of native biota on the more remote islands.
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