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Université de Fribourg

Ranking alien species based on their risks of causing environmental impacts : A global assessment of alien ungulates

Volery, Lara ; Jatavallabhula, Divija ; Scillitani, Laura ; Bertolino, Sandro ; Bacher, Sven

In: Global Change Biology, 2021, vol. 27, no. 5, p. 1003-1016

For an efficient allocation of the limited resources to alien species management, the most damaging species should be prioritized. Comparing alien species based on their impacts is not straightforward, as the same species can cause different types and magnitudes of impacts when introduced to different contexts, making it difficult to summarize its overall impact. The Environmental Impact...

Université de Fribourg

Projecting the continental accumulation of alien species through to 2050

Seebens, Hanno ; Bacher, Sven ; Blackburn, Tim M. ; Capinha, César ; Dawson, Wayne ; Dullinger, Stefan ; Genovesi, Piero ; Hulme, Philip E. ; Kleunen, Mark ; Kühn, Ingolf ; Jeschke, Jonathan M. ; Lenzner, Bernd ; Liebhold, Andrew M. ; Pattison, Zarah ; Pergl, Jan ; Pyšek, Petr ; Winter, Marten ; Essl, Franz

In: Global Change Biology, 2020, p. gcb.15333

Biological invasions have steadily increased over recent centuries. However, we still lack a clear expectation about future trends in alien species numbers. In particular, we do not know whether alien species will continue to accumulate in regional floras and faunas, or whether the pace of accumulation will decrease due to the depletion of native source pools. Here, we apply a new model to...

Université de Fribourg

Independent introductions of hedgehogs to the North and South Island of New Zealand

Pipek, Pavel ; Pyšek, Petr ; Bacher, Sven ; Bolfíková, Barbora Černá ; Hulme, Philip E.

In: New Zealand Journal of Ecology, 2020, vol. 44, no. 1, p. -

According to the most recent (2005) compendium on the history of the European hedgehog (Erinaceus europaeus) in New Zealand, this small insectivorous mammal was first brought from Europe to the South Island in the 19th century. This introduction has been presumed to be the source of hedgehogs that subsequently spread to the North Island. This view was informed by the absence of hedgehogs in...

Université de Fribourg

Mechanisms of vision in the fruit fly

Andres-Bragado, Lucia de ; Sprecher, Simon G.

In: Current Opinion in Insect Science, 2019, vol. 36, p. 25–32

Vision is essential to maximize the efficiency of daily tasks such as feeding, avoiding predators or finding mating partners. An advantageous model is Drosophila melanogaster, since it offers tools that allow genetic and neuronal manipulation with high spatial and temporal resolution, which can be combined with behavioral, anatomical and physiological assays. Recent advances have expanded our...

Université de Fribourg

InvasiBES: Understanding and managing the impacts of Invasive alien species on Biodiversity and Ecosystem Services

Gallardo, Belinda ; Bacher, Sven ; Bradley, Bethany ; Comín, Francisco A. ; Gallien, Laure ; Jeschke, Jonathan M. ; Sorte, Cascade J. B. ; Vilà, Montserrat

In: NeoBiota, 2019, vol. 50, p. 109–122

Invasive Alien Species (IAS) are amongst the most significant drivers of species extinction and ecosystem degradation, causing negative impacts on ecosystem services and human well-being. InvasiBES, a project funded by BiodivERsA-Belmont Forum for 2019–2021, will use data and models across scales, habitats and species to understand and anticipate the multi-faceted impacts of IAS and to...

Université de Fribourg

Interactions of "Sarracenia purpurea" and its inquilines : comparing Europe and North America

Zander, Axel ; Bersier, Louis-Félix (Dir.)

Thèse de doctorat : Université de Fribourg, 2016 ; no. 1984.

Sarracenia purpurea ist eine fleischfressende Pflanze aus Nordamerika und gilt als Modellsystem für aquatische Lebensgemeinschaften. Nachdem die Kannenblätter sich mit Regenwasser gefüllt haben, entwickelt sich ein Nahrungsnetz in diesen auf Detritus basierenden Ökosystemen welches von Bakterien bis zu Insektenlarven reicht und den Top-Prädator Wyeomyia smithii einschliesst. Zwei Wochen nach...