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Predicting rat presence on small islands

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We analyzed data on presence or absence of 156 vascular plant species on 14 islets of the Cabrera National Park archipelago and found a significant correlation between rat presence and floristic composition. By contrast, island area, island height, and storm exposition seem to have no effect on species composition. We chose a subset of plants favoured or depressed by rat presence for a non-linear principal component analysis and evaluated successfully the usefulness of such a subset in predicting rat presence using a randomization method. To optimally allocate resources, rat eradication campaigns should be focused in islets displaying rat-free vegetation type.
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Document Type: Research Article

Publication date: April 1, 2001

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