About the Authors

Carlo Ricotta

carlo.ricotta@uniroma1.it

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

Laura Celesti-Grapow

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

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

Gillian Rapson

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

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

Frank A. La Sorte

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

Ken Thompson

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

Competing Interests

Co-author Carlo Ricotta is a PLOS ONE Editorial Board Member. This does not alter our adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: CR PP. Analyzed the data: CR. Wrote the paper: CR LC IK FL GR PP KT. Collected the data: LC IK FL GR PP KT.