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Université de Fribourg

A local risk map using field observations of the Asian longhorned beetle to optimize monitoring activities

Fragnière, Yann ; Forster, B. ; Hölling, D. ; Wermelinger, B. ; Bacher, Sven

In: Journal of Applied Entomology, 2018, vol. 142, no. 6, p. 578–588

The Asian longhorned beetle Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae) is one of the most dangerous xylophagous pests affecting broadleaf trees in the world. Eradication programmes are undertaken in non-native regions, requiring extensive resources and involving high costs. An adapted strategy must be set up to optimize the ratio cost/probability of success. We...

Université de Fribourg

Developing a framework of minimum standards for the risk assessment of alien species

Roy, Helen E. ; Rabitsch, Wolfgang ; Scalera, Riccardo ; Stewart, Alan ; Gallardo, Belinda ; Genovesi, Piero ; Essl, Franz ; Adriaens, Tim ; Bacher, Sven ; Booy, Olaf ; Branquart, Etienne ; Brunel, Sarah ; Copp, Gordon Howard ; Dean, Hannah ; D?hondt, Bram ; Josefsson, Melanie ; Kenis, Marc ; Kettunen, Marianne ; Linnamagi, Merike ; Lucy, Frances ; Martinou, Angeliki ; Moore, Niall ; Nentwig, Wolfgang ; Nieto, Ana ; Pergl, Jan ; Peyton, Jodey ; Roques, Alain ; Schindler, Stefan ; Schönrogge, Karsten ; Solarz, Wojciech ; Stebbing, Paul D. ; Trichkova, Teodora ; Vanderhoeven, Sonia ; Valkenburg, Johan van ; Zenetos, Argyro

In: Journal of Applied Ecology, 2018, vol. 55, no. 2, p. 526–538

Biological invasions are a threat to biodiversity, society and the economy. There is an urgent need to provide evidence-based assessments of the risks posed by invasive alien species (IAS) to prioritize action. Risk assessments underpin IAS policies in many ways: informing legislation; providing justification of restrictions in trade or consumer activities; prioritizing surveillance and rapid...

Université de Fribourg

Troubling travellers: are ecologically harmful alien species associated with particular introduction pathways?

Pergl, Jan ; Pyšek, Petr ; Bacher, Sven ; Essl, Franz ; Genovesi, Piero ; Harrower, Colin A. ; Hulme, Philip E. ; Jeschke, Jonathan M. ; Kenis, Marc ; Kühn, Ingolf ; Perglová, Irena ; Rabitsch, Wolfgang ; Roques, Alain ; Roy, David B. ; Roy, Helen E. ; Vilà, Montserrat ; Winter, Marten ; Nentwig, Wolfgang

In: NeoBiota, 2017, vol. 32, p. 1–20

Prioritization of introduction pathways is seen as an important component of the management of biological invasions. We address whether established alien plants, mammals, freshwater fish and terrestrial invertebrates with known ecological impacts are associated with particular introduction pathways (release, escape, contaminant, stowaway, corridor and unaided). We used the information from...

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

Species richness-environment relationships of european arthropods at two spatial grains: habitats and countries

Entling, Martin H. ; Schweiger, Oliver ; Bacher, Sven ; Espadaler, Xavier ; Hickler, Thomas ; Kumschick, Sabrina ; Woodcock, Ben A. ; Nentwig, Wolfgang

In: PLoS ONE, 2012, vol. 7, no. 9, p. e45875

We study how species richness of arthropods relates to theories concerning net primary productivity, ambient energy, water-energy dynamics and spatial environmental heterogeneity. We use two datasets of arthropod richness with similar spatial extents (Scandinavia to Mediterranean), but contrasting spatial grain (local habitat and country). Samples of ground-dwelling spiders, beetles, bugs and...

Université de Fribourg

When are eradication campaigns successful? A test of common assumptions

Pluess, Therese ; Cannon, Ray ; Jarošík, Vojtěch ; Pergl, Jan ; Pyšek, Petr ; Bacher, Sven

In: Biological Invasions, 2012, p. -

Eradication aims at eliminating populations of alien organisms from an area. Since not all eradications are successful, several factors have been proposed in the literature (mainly by referring to case studies) to be crucial for eradication success, such as infestation size or reaction time. To our knowledge, however, no study has statistically evaluated which factors affect eradication success...

Université de Fribourg

Temporal and spatial variations in the parasitoid complex of the horse chestnut leafminer during its invasion of Europe

Grabenweger, Giselher ; Kehrli, Patrik ; Zweimüller, Irene ; Augustin, Sylvie ; Avtzis, Nikolaos ; Bacher, Sven ; Freise, Jona ; Girardoz, Sandrine ; Guichard, Sylvain ; Heitland, Werner ; Lethmayer, Christa ; Stolz, Michaela ; Tomov, Rumen ; Volter, Lubomir ; Kenis, Marc

In: Biological Invasions, 2010, vol. 12, no. 8, p. 2797-2813

The enemy release hypothesis posits that the initial success of invasive species depends on the scarcity and poor adaptation of native natural enemies such as predators and parasitoids. As for parasitoids, invading hosts are first attacked at low rates by a species-poor complex of mainly generalist species. Over the years, however, parasitoid richness may increase either because the invading host...

Université de Fribourg

Disentangling the role of environmental and human pressures on biological invasions across Europe

Pyšek, Petr ; Jarošík, Vojtěch ; Hulme, Philip E. ; Kühn, Ingolf ; Wild, Jan ; Arianoutsou, Margarita ; Bacher, Sven ; Chiron, Francois ; Didžiulis, Viktoras ; Essl, Franz ; Genovesi, Piero ; Gherardi, Francesca ; Hejda, Martin ; Kark, Salit ; Lambdon, Philip W. ; Desprez-Loustau, Marie-Laure ; Nentwig, Wolfgang ; Pergl, Jan ; Poboljšaj, Katja ; Rabitsch, Wolfgang ; Roques, Alain ; Roy, David B. ; Shirley, Susan ; Solarz, Wojciech ; Vilà, Montserrat ; Winter, Marten

In: Proceedings of the National Academy of Sciences of the United States of America, 2010, vol. 107, no. 27, p. 12157-12162

The accelerating rates of international trade, travel, and transport in the latter half of the twentieth century have led to the progressive mixing of biota from across the world and the number of species introduced to new regions continues to increase. The importance of biogeographic, climatic, economic, and demographic factors as drivers of this trend is increasingly being realized but as yet...