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Testing Darwin’s naturalization hypothesis in the Azores: Predicting invasiveness in the Azores

Schaefer, Hanno, Hardy, Olivier J., Silva, Luís, Barraclough, Timothy G., Savolainen, Vincent·2011·Ecology Letters

Abstract

Invasive species are a threat for ecosystems worldwide, especially oceanic islands. Predicting the invasive potential of introduced species remains difficult, and only a few studies have found traits correlated to invasiveness. We produced a molecular phylogenetic dataset and an ecological trait database for the entire Azorean flora and find that the phylogenetic nearest neighbour distance (PNND), a measure of evolutionary relatedness, is significantly correlated with invasiveness. We show that introduced plant species are more likely to become invasive in the absence of closely related species in the native flora of the Azores, verifying Darwin's 'naturalization hypothesis'. In addition, we find that some ecological traits (especially life form and seed size) also have predictive power on invasive success in the Azores. Therefore, we suggest a combination of PNND with ecological trait values as a universal predictor of invasiveness that takes into account characteristics of both introduced species and receiving ecosystem.

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Metadata

Authors
Schaefer, H., Hardy, O. J., Silva, L., Barraclough, T. G., & Savolainen, V.
Venue
Ecology Letters
Publisher
Wiley
Published
2011-02-15
Volume
14
Issue
4
Pages
389-396
ISSN
1461-023X (ISSN-L)
OpenAlex
W2115062971
Cited by
164
References
1
FWCI
10.67
Type
journal article
Language
en
Open access
closed
Licence
doi.wiley.com/10.1002/tdm_license_1.1 (tdm, 1659 d)

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Schaefer, H., Hardy, O. J., Silva, L., Barraclough, T. G., & Savolainen, V. (2011). Testing Darwin’s naturalization hypothesis in the Azores: Predicting invasiveness in the Azores. Ecology Letters. https://doi.org/10.1111/j.1461-0248.2011.01600.x

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