Université de Fribourg

Quantifying invasion risk: the relationship between establishment probability and founding population size

Duncan, Richard P. ; Blackburn, Tim M. ; Rossinelli, Silvia ; Bacher, Sven

In: Methods in Ecology and Evolution, 2014, vol. 5, no. 11, p. 1255–1263

1. Invasive species usually start out as small colonizing populations that are prone to extinction through demographic stochasticity and Allee effects, leading to a positive relationship between establishment probability and founding population size. However, establishment success also depends on the environment to which species are introduced: for a given species, some locations will be more...

Université de Fribourg

Quarantine arthropod invasions in Europe: the role of climate, hosts and propagule pressure

Bacon, Steven J. ; Aebi, Alexandre ; Calanca, Pierluigi ; Bacher, Sven

In: Diversity and Distributions, 2014, vol. 20, no. 1, p. 84-89

Aim: To quantify the relative importance of propagule pressure, climate-matching and host availability for the invasion of agricultural pest arthropods in Europe and to forecast newly emerging pest species and European areas with the highest risk of arthropod invasion under current climate and a future climate scenario (A1F1).Location: Europe.Methods: We quantified propagule pressure,...

Université de Fribourg

Addressing a critique of the TEASI framework for invasive species risk assessment

Leung, Brian ; Roura-Pascual, Nuria ; Bacher, Sven ; Heikkilä, Jaakko ; Brotons, Lluis ; Burgman, Mark A ; Dehnen-Schmutz, Katharina ; Essl, Franz ; Hulme, Philip E ; Richardson, David M ; Sol, Daniel ; Vilà, Montserrat

In: Ecology Letters, 2013, p. -

We address criticism that the Transport, Establishment, Abundance, Spread, Impact (TEASI) framework does not facilitate objective mapping of risk assessment methods nor defines best practice. We explain why TEASI is appropriate for mapping, despite inherent challenges, and how TEASI offers considerations for best practices, rather than suggesting one best practice.

Université de Fribourg

TEASIng apart alien species risk assessments: a framework for best practices

Leung, Brian ; Roura-Pascual, Nuria ; Bacher, Sven ; Heikkilä, Jaakko ; Brotons, Lluis ; Burgman, Mark A. ; Dehnen-Schmutz, Katharina ; Essl, Franz ; Hulme, Philip E. ; Richardson, David M. ; Sol, Daniel ; Vilà, Montserrat

In: Ecology Letters, 2012, vol. 15, no. 12, p. 1475-1493

Some alien species cause substantial impacts, yet most are innocuous. Given limited resources, forecasting risks from alien species will help prioritise management. Given that risk assessment (RA) approaches vary widely, a synthesis is timely to highlight best practices. We reviewed quantitative and scoring RAs, integrating < 300 publications into arguably the most rigorous quantitative RA...