Colonisation of native and exotic conifers by indigenous bark beetles (Coleoptera: Scolytinae) in France

Tree insects and pathogens display opposite tendencies to attack native vs. non-native pines

“…Consistent with this, Ips sexdentatus adults were larger when emerging from P. pinaster vs. P. radiata. Stem boring insects can also be influenced by other anatomical differences between the two pine species, especially shoot diameter (Lombardero et al, 2008) and thickness of the outer bark (Bertheau et al, 2009).…”

Arthropod species richness in the Norway Spruce (Picea abies (L.) Karst.) canopy along an elevation gradient

“…, but this classification has not yet been justified. Interactions of exotic trees and native fauna are of vital interest for ecologists in large-scale experiments of the establishment of animal-plant relationships (see, e.g., Rejmá nek, 2000;Richardson et al, 2000;Davis, 2003;Richardson and Rejmá nek, 2004;Roques et al, 2006;Adams et al, 2009;Bertheau et al, 2009). As already mentioned, the definitions of Richardson et al (2000) barely fit Norway Spruce at lower elevations in central Europe because the geographic continuity encompasses the natural and artificial distributions.…”

Abundance and pest classification of scolytid species (Coleoptera: Curculionidae, Scolytinae) follow different patterns

“…However, the degree of depletion is dependent on the presence or absence of congeneric species as well as on the chemical components of the plants, and a trend to more-generalized species on non-native plants has been observed (Degomez and Wagner, 2001;Brändle et al, 2008;Bertheau et al, 2009;Goßner et al, 2009). Of the four non-native tree genera, only on Robinia were much fewer scolytids recorded than expected from the regression of species number versus resource availability, although Robinia was introduced to Europe around 1602 (Mayer, 1977).…”