Habitat niche breadth expands over centuries in Europe's alien flora — analysis code and inputs

Analysis code and hurdle-model input CSVs for the manuscript Habitat niche breadth expands over centuries in Europe's alien flora. Abstract. Across Europe, alien plants predominantly occur in disturbed, human-modified vegetation. Whether these gateway habitats confine the alien flora, or open onto more natural vegetation as residence time lengthens, is untested at continental scale. We analysed 1,023,883 European Vegetation Archive plots (1930–2023) holding 1,314 post-1492 alien plant species, grouped species into residence-time cohorts, and identified each species' overrepresented habitats relative to local availability. Given overrepresentation in at least one habitat, the probability of overrepresentation in more than one rose from 25% among recently introduced species to 71% among those present over 200 years. Ruderal habitats were the most invaded throughout (23–48%), arable land rose most steeply (6% to 35%), and alpine and nutrient-poor habitats stayed rarely overrepresented. Ruderal vegetation was most often recorded first, ahead of deciduous forests and dry grasslands. Habitat niche breadth broadens across centuries of residence, reaching into semi-natural vegetation among long-established aliens. Licence. The code is released under the MIT licence (LICENSE-CODE.txt). The data tables are released under CC BY 4.0 (LICENSE-DATA.txt), which is the licence recorded for this record.