Geographical Constraints Are Stronger than Invasion Patterns for European Urban Floras

• Carlo Ricotta ,

  * E-mail: carlo.ricotta@uniroma1.it

  Affiliation Department of Environmental Biology, University of Rome ‘La Sapienza’, Rome, Italy

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• Laura Celesti-Grapow,

  Affiliation Department of Environmental Biology, University of Rome ‘La Sapienza’, Rome, Italy

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• Ingolf Kühn,

  Affiliations UFZ, Helmholtz Centre for Environmental Research, Department of Community Ecology, Halle, Germany, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany

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• Gillian Rapson,

  Affiliation Ecology Group, Institute of Agriculture and Environment, Massey University, Palmerston North, New Zealand

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• Petr Pyšek,

  Affiliations Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice, Czech Republic, Department of Ecology, Faculty of Science, Charles University, Prague, Czech Republic

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• Frank A. La Sorte,

  Affiliation Cornell Lab of Ornithology, Ithaca, New York, United States of America

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• Ken Thompson

  Affiliation Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom

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