Article impact statement: In an era of profound biodiversity crisis, invasion costs, invader impacts, and human agency should not be dismissed.

Centre for Biodiversity and Environment Research University College London Gower Street London WC1E 6BT U K

Centre for Invasion Biology Department of Botany and Zoology Stellenbosch University Stellenbosch South Africa

CNRS AgroParisTech Ecologie Systématique Evolution Université Paris Saclay Orsay 91405 France

Department of Biology University of Fribourg Chemin du Musée 10 Fribourg 1700 Switzerland

Department of Botany and Biodiversity Research University of Vienna Vienna 1030 Austria

Department of Ecology and Evolutionary Biology University of Tennessee 569 Dabney Hall 1416 Circle Dr Knoxville TN 37996 U S A

Department of Ecology Faculty of Science Charles University Viničná 7 Prague CZ 128 44 Czech Republic

Department of Invasion Ecology Institute of Botany Czech Academy of Sciences Průhonice CZ 252 43 Czech Republic

Department of River Ecology and Conservation Senckenberg Research Institute and Natural History Museum Frankfurt Gelnhausen 60325 Germany

Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses University of South Bohemia in České Budějovice Zátiší 728 2 Vodňany 389 25 Czech Republic

GEOMAR Helmholtz Zentrum für Ozeanforschung Kiel Kiel 24105 Germany

Institute for Environmental Protection and Research ISPRA and Chair IUCN SSC Invasive Species Specialist Group Rome Italy

Institute of Zoology Zoological Society of London Regent's Park London NW1 4RY U K

Instituto de Ecología y Biodiversidad Santiago Chile

Laboratorio de Invasiones Biológicas Facultad de Ciencias Forestales Universidad de Concepción Casilla 160 C Concepción Chile

Paris Sciences et Lettres Research University Université Paris Dauphine CNRS UMR [7243] Lamcade Place Lattre de Tassigny Paris 75016 France

Redpath Museum McGill University Montreal Quebec H3A 0C4 Canada

School of Biological Sciences Queen's University Belfast Belfast BT9 5DL U K

School of Biological Sciences University of Auckland Private Bag 92019 Auckland 1142 New Zealand

Conserv Biol. 2020 Jun;34(3):581-588. doi: 10.1111/cobi.13440. PubMed

Conserv Biol. 2020 Dec;34(6):1583-1585. doi: 10.1111/cobi.13594. PubMed

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