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Université de Fribourg

Socio-economic impact classification of alien taxa (SEICAT)

Bacher, Sven ; Blackburn, Tim M. ; Essl, Franz ; Genovesi, Piero ; Heikkilä, Jaakko ; Jeschke, Jonathan M. ; Jones, Glyn ; Keller, Reuben ; Kenis, Marc ; Kueffer, Christoph ; Martinou, Angeliki F. ; Nentwig, Wolfgang ; Pergl, Jan ; Pyšek, Petr ; Rabitsch, Wolfgang ; Richardson, David M. ; Roy, Helen E. ; Saul, Wolf-Christian ; Scalera, Riccardo ; Vilà, Montserrat ; Wilson, John R. U. ; Kumschick, Sabrina

In: Methods in Ecology and Evolution, 2017, p. -

Many alien taxa are known to cause socio-economic impacts by affecting the different constituents of human well-being (security; material and non-material assets; health; social, spiritual and cultural relations; freedom of choice and action). Attempts to quantify socio-economic impacts in monetary terms are unlikely to provide a useful basis for evaluating and comparing impacts of alien taxa...

Université de Fribourg

Still not enough taxonomists: reply to Joppa et al.

Bacher, Sven

In: Trends in Ecology and Evolution, 2012, vol. 27, no. 2, p. 65–66

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

Gaps in border controls are related to quarantine alien insect invasions in Europe

Bacon, Steven James ; Bacher, Sven ; Aebi, Alexandre

In: PLoS One, 2012, vol. 7, no. 10, p. e47689

Alien insects are increasingly being dispersed around the world through international trade, causing a multitude of negative environmental impacts and billions of dollars in economic losses annually. Border controls form the last line of defense against invasions, whereby inspectors aim to intercept and stop consignments that are contaminated with harmful alien insects. In Europe, member states...

Université de Fribourg

PRATIQUE: a research project to enhance pest risk analysis techniques in the European Union

Baker, R. H. A. ; Battisti, A. ; Bremmer, J. ; Kenis, M. ; Mumford, J. ; Petter, F. ; Schrader, G. ; Bacher, Sven ; Barro, P. De ; Hulme, P. E. ; Karadjova, O. ; Lansink, A. O. ; Pruvost, O. ; Pyšek, P. ; Roques, A. ; Baranchikov, Y. ; Sun, J.-H.

In: EPPO Bulletin, 2009, vol. 39, no. 1, p. 87 - 93

PRATIQUE is an EC-funded 7th Framework research project designed to address the major challenges for pest risk analysis (PRA) in Europe. It has three principal objectives: (a) to assemble the datasets required to construct PRAs valid for the whole of the EU, (b) to conduct multi-disciplinary research that enhances the techniques used in PRA and (c) to provide a decision support scheme for PRA...

Université de Fribourg

A unified classification of alien species based on the magnitude of their environmental impacts

Blackburn, Tim M. ; Essl, Franz ; Evans, Thomas ; Hulme, Philip E. ; Jeschke, Jonathan M. ; Kühn, Ingolf ; Kumschick, Sabrina ; Marková, Zuzana ; Mrugała, Agata ; Nentwig, Wolfgang ; Pergl, Jan ; Pyšek, Petr ; Rabitsch, Wolfgang ; Ricciardi, Anthony ; Richardson, David M. ; Sendek, Agnieszka ; Vilà, Montserrat ; Wilson, John R. U. ; Winte, Marten ; Genovesi, Piero ; Bacher, Sven

In: PLoS Biol, 2014, vol. 12, no. 5, p. e1001850

Species moved by human activities beyond the limits of their native geographic ranges into areas in which they do not naturally occur (termed aliens) can cause a broad range of significant changes to recipient ecosystems; however, their impacts vary greatly across species and the ecosystems into which they are introduced. There is therefore a critical need for a standardised method to evaluate,...

Université de Fribourg

A proposed unified framework for biological invasions

Blackburn, Tim M. ; Pyšek, Petr ; Bacher, Sven ; Carlton, James T. ; Duncan, Richard P. ; Jarošík, Vojtěch ; Wilson, John R.U. ; Richardson, David M.

In: Trends in Ecology & Evolution, 2011, vol. 26, no. 7, p. 333-339

There has been a dramatic growth in research on biological invasions over the past 20 years, but a mature understanding of the field has been hampered because invasion biologists concerned with different taxa and different environments have largely adopted different model frameworks for the invasion process, resulting in a confusing range of concepts, terms and definitions. In this review, we...

Université de Fribourg

Ineffective crypsis in a crab spider: a prey community perspective

Brechbühl, Rolf ; Casas, Jérôme ; Bacher, Sven

In: Proceedings of the Royal Society B: Biological Sciences, 2009///doi: 10.1098/rspb.2009.1632

Cryptic coloration is assumed to be beneficial to predators because of an increased encounter rate with unwary prey. This hypothesis is, however, very rarely, if ever, studied in the field. The aim of this study was to quantify the encounter rate and capture success of an ambush predator, in the field, as a function of its level of colour-matching with the background. We used the crab spider...

Université de Fribourg

Impact of flower-dwelling crab spiders on plant-pollinator mutualisms

Brechbühl, Rolf ; Kropf, Christian ; Bacher, Sven

In: Basic and Applied Ecology, 2009///10.1016/j.baae.2009.07.001

Indirect effects in interactions occur when a species influences a third species by modifying the behaviour of a second one. It has been suggested that indirect effects of crab spiders (Thomisidae) on pollinator behaviour can cascade down the food web and negatively affect plant fitness. However, it is poorly understood how different pollinator groups react to crab spiders and, thus, when a...

Université de Fribourg

Diet choice of a predator in the wild: overabundance of prey and missed opportunities along the prey capture sequence

Brechbühl, Rolf ; Casas, Jérôme ; Bacher, Sven

In: Ecosphere, 2011, vol. 2, no. 12, p. art133

Optimal diet theory (ODT) postulates that predators adjust their foraging decisions by calculating a prey value from the potential biomass gain, handling time, prey vulnerability and encounter rate. Tests of ODT have however so far mainly been restricted to laboratory settings. By video surveillance, we gathered a large data set of more than 2000 field observations of crab spider (Misumena vatia)...