Université de Fribourg

Assessing the ecological risk posed by a recently established invasive alien predator: Harmonia axyridis as a case study

Kenis, Marc ; Adriaens, Tim ; Brown, Peter M. J. ; Katsanis, Angelos ; Martin, Gilles San ; Branquart, Etienne ; Maes, Dirk ; Eschen, René ; Zindel, Renate ; Vlaenderen, Johan Van ; Babendreier, Dirk ; Roy, Helen E. ; Hautier, Louis ; Poland, Remy L.

In: BioControl, 2017, vol. 62, no. 3, p. 341–354

Invasive alien predators are a serious threat to biodiversity worldwide. However, there is no generic method for assessing which local species are most at risk following the invasion of a new predator. The harlequin ladybird, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), is an alien in Europe and many other parts of the world where it affects other species of ladybirds through...

Université de Neuchâtel

Detecting arthropod intraguild predation in the field

Aebi, Alexandre ; Brown, Peter M. J ; De Clercq, Patrick ; Hautier, Louis ; Howe, Andy ; Ingels, Brecht ; Ravn, Hans-Peter ; Sloggett, John J ; Zindel, Renate ; Thomas, Alison

In: BioControl, 2011, vol. 56, no. 4, p. 429-440

The process of biological control carries a distinct risk that an alien biological control agent (BCA) will become established as an invasive alien species with an associated threat to the local ecosystem biodiversity. It is imperative that a wide-ranging environmental risk assessment (ERA) is performed before the release of any BCA. This should include considering various potential but difficult...

Université de Neuchâtel

Molecular analysis of the gut contents of Harmonia axyridis (Coleoptera: Coccinellidae) as a method for detecting intra-guild predation by this species on aphidophagous predators other than coccinellids

Ingels, Brecht ; Aeby, Alexandre ; Hautier, Louis ; Van Leeuwen, Thomas ; De Clerc, Patrick

In: European Journal of Entomology, 2013, vol. 110, no. 4, p. 567-576

Several studies have demonstrated that the invasive ladybird Harmonia axyridis is a strong intra-guild predator of native species of ladybird. Laboratory studies have shown that H. axyridis can be an intra-guild predator of aphid predators other than coccinellids, including the hoverfly Episyrphus balteatus and lacewing Chrysoperla carnea. However, little is known about...

Université de Fribourg

Invasive alien predator causes rapid declines of native European ladybirds

Roy, Helen E. ; Adriaens, Tim ; Isaac, Nick J. B. ; Kenis, Marc ; Onkelinx, Thierry ; Martin, Gilles San ; Brown, Peter M. J. ; Hautier, Louis ; Poland, Remy ; Roy, David B. ; Comont, Richard ; Eschen, René ; Frost, Robert ; Zindel, Renate ; Vlaenderen, Johan Van ; Nedvěd, Oldrich ; Ravn, Hans Peter ; Grégoire, Jean Claude ; Biseau, Jean Christophe de ; Maes, Dirk

In: Diversity and Distributions, 2012, p. -

Aim Invasive alien species (IAS) are recognized as major drivers of biodiversity loss, but few causal relationships between IAS and species declines have been documented. In this study, we compare the distribution (Belgium and Britain) and abundance (Belgium, Britain and Switzerland) of formerly common and widespread native ladybirds before and after the arrival of Harmonia axyridis, a...