BACKGROUND: The Pacific Region has the highest density of naturalised plant species worldwide, which makes it an important area for research on the ecology, evolution and biogeography of biological invasions. While different data sources on naturalised plant species exist for the Pacific, there is no taxonomically and spatially harmonised database available for different subsets of species and islands. A comprehensive, accessible database containing the distribution of naturalised vascular plant species in the Pacific will enable new basic and applied research for researchers and will be an important information source for practitioners working in the Region. NEW INFORMATION: Here, we present PacIFlora, an updated and taxonomically standardised list of naturalised species, their unified nativeness, cultivation and invasive status and their distribution across the Pacific Ocean, including harmonised location denoination. This list is based on the two largest databases on naturalised plants for the Region, specifically the Pacific Island Ecosystems at Risk (PIER) and the Global Naturalised Alien Flora (GloNAF) databases. We provide an outlook for how this database can contribute to numerous research questions and conservation efforts.

Academy of Sciences of the Czech Republic Pruhonice Czech Republic Academy of Sciences of the Czech Republic Pruhonice Czech Republic

BioInvasions Global Change Macroecology Group Department of Botany and Biodiversity Research University Vienna Vienna Austria BioInvasions Global Change Macroecology Group Department of Botany and Biodiversity Research University Vienna Vienna Austria

Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa

Czech Academy of Sciences Institute of Botany Department of Invasion Ecology Průhonice Czech Republic Czech Academy of Sciences Institute of Botany Department of Invasion Ecology Průhonice Czech Republic

Department of Biodiversity Macroecology and Biogeography Faculty of Forest Sciences University of Göttingen Göttingen Germany Department of Biodiversity Macroecology and Biogeography Faculty of Forest Sciences University of Göttingen Göttingen Germany

Durham University Durham United Kingdom Durham University Durham United Kingdom

German Centre for Integrative Biodiversity Research Halle Jena Leipzig Leipzig Germany

Hawaiian Ecosystems at Risk project Carrboro United States of America Hawaiian Ecosystems at Risk project Carrboro United States of America

Institute of Biology Martin Luther University Halle Wittenberg Halle Germany

Institute of Botany Průhonice Czech Republic Institute of Botany Průhonice Czech Republic

Martin Luther Universität Halle Wittenberg Leipzig Germany Martin Luther Universität Halle Wittenberg Leipzig Germany

Pacific Southwest Research Station USDA Forest Service Sun Lakes United States of America

Senckenberg Biodiversity and Climate Research Centre Frankfurt am Main Germany

Universidad Mayor Santiago Chile Universidad Mayor Santiago Chile

University of Konstanz Konstanz Germany University of Konstanz Konstanz Germany

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