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Habitat affiliation of non-native plant species across their introduced ranges on Caribbean islands

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Abstract

Investigating the ability of non-native species to establish and invade different habitats is one of the most important approaches in the analysis of biological invasion mechanisms. In this study, we used a regional dataset of non-native plant species compiled for Caribbean islands to estimate the level of invasion of major habitat types in this region. Our results show that although non-native species are successfully invading all habitat types evaluated, they are exhibiting considerably higher affinity toward human-made habitats. Across these islands, highly anthropogenically altered habitats such as ruderal sites, pastures, and cultivated lands are the habitats showing higher levels of invasion compared to natural habitats with low levels of disturbance. We found a significant association between geographical origin and habitat invaded, with species originating from Asia, South America, and Africa overrepresented as invaders in the Caribbean. Additionally, a significant association between life-form and habitat invaded was detected, with more trees and herbaceous species than expected successfully invading ruderal habitats, and more trees and vines than expected invading natural forests. In general, non-native species invading habitats across Caribbean islands seem to be adapted to a broad range of successional stages ranging from highly disturbed human-made habitats to least disturbed natural forests. Our results highlight how complex interactions among human activity, geographical origin, plant life-form, and habitat affinity can determine patterns of invasions across broad landscapes.

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Data availability

All data used in this study are publicly available at the CABI Invasive Species Compendium at https://www.cabidigitallibrary.org/product/QI. The dataset generated and analyzed in this study, R codes, and test results are available in the Supplementary Materials.

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Acknowledgements

This research was funded by the U.S. Department of Agriculture through the Cooperative Agreement number AP21OA00000C008. We thank Anna Page and IT personnel at CABI for technical support preparing and handling the dataset. Logistic support for this research was provided by Eduardo Ventosa at Effective Environmental Restoration Inc., the Institute of the Environment, and the University of Connecticut.

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JRS conceived the study and compiled the data. JRS designed and performed the analyses with inputs from JDA. JRS led the writing and all authors contributed critically to the manuscript and gave final approval for publication.

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Correspondence to Julissa Rojas-Sandoval.

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The authors have no relevant financial or non-financial interests to disclose.

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Rojas-Sandoval, J., Ackerman, J.D., Dueñas, MA. et al. Habitat affiliation of non-native plant species across their introduced ranges on Caribbean islands. Biol Invasions (2024). https://doi.org/10.1007/s10530-024-03307-4

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  • DOI: https://doi.org/10.1007/s10530-024-03307-4

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