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Ecological effects of invasive alien insects
The effects caused by different insect invaders are reviewed according to their ecosystem roles, i.e. herbivores, predators, parasites, parasitoids and pollinators; the level of biological organisation at which they occur; and the direct and indirect mechanisms underlying these effects.
Temporal and interspecific variation in rates of spread for insect species invading Europe during the last 200 years
It is hypothesized that the political changes in Europe following the collapse of the Iron Curtain in 1989, and the further dismantling of customs checkpoints within an enlarged European Union (EU) have facilitated the faster spread of alien insect species.
How can alien species inventories and interception data help us prevent insect invasions?
An economic impact was found for 40% of the alien insects in Switzerland and Austria, whereas none is known to have an ecological impact, and Sternorrhyncha, Coleoptera and Psocoptera were particularly well represented in the alien fauna compared to the native fauna.
Effect of non‐lethal sampling on life‐history traits of the protected moth Graellsia isabelae (Lepidoptera: Saturniidae)
Abstract 1. Non‐lethal genetic surveys in insects usually extract DNA from a leg or a piece of wing. Although preferable to lethal sampling, little is known about the effect of leg/wing non‐lethal
A lack of native congeners may limit colonization of introduced conifers by indigenous insects in Europe.
We compared the recruitment of phytophagous arthropod pests onto exotic conifers introduced in Europe without any congeners with that of exotic conifers that have native congeners. In 130 years of ...
Planting Sentinel European Trees in Eastern Asia as a Novel Method to Identify Potential Insect Pest Invaders
Sendinel trees were planted in China during 2007-2011 as an early warning tool to identify the potential for additional Asian insect species to colonize European trees, and results are promising, although the method is not appropriate for xylophagous pests and other groups developing on larger trees.
Molecular phylogeny and evolution of host‐plant use in conifer seed chalcids in the genus Megastigmus (Hymenoptera: Torymidae)
It is hypothesized that the Megastigmus group associated with Pinaceae may have a much higher invasive potential than that related to Cupressaceae, and the presence of invasive Nearctic species in the Palaearctic is confirmed, and a cryptic species complex is demonstrated.
The rapid spread of Leptoglossus occidentalis in Europe: a bridgehead invasion
The results show that at least two independent introductions of L. occidentalis have occurred in Europe, and showed a stronger genetic similarity of European invasive populations with the eastern North American populations than with those of the native range, suggesting that invasive North American population acted as a bridgehead for European invasion.
Tentative analysis of the interceptions of non-indigenous organisms in Europe during 1995-2004
The discrepancies observed for some species between a limited number of interceptions and their effective establishment in Europe (e.g. only 1 interception for the western corn rootworm, Diabrotica virgifera) could be useful for identifying the invasion pathways.
Epidemiology of asexuality induced by the endosymbiotic Wolbachia across phytophagous wasp species: host plant specialization matters
It is demonstrated that thelytoky evolved from ancestral arrhenotoky through the horizontal transmission and the fixation of the parthenogenesis‐inducing Wolbachia, and further reinforces the hypothesis that community structure of insects is a major driver of the epidemiology of endosymbionts and that competitive interactions among closely related species may facilitate their horizontal transmission.