| differential success in northwards range expansion between ecotypes of the marble gallwasp andricus kollari: a tale of two lifecycles. | the marble gallwasp andricus kollari has a native range divided into two geographically separated lifecycles. in eastern europe and turkey, the lifecycle involves a sexual generation on turkey oak, quercus cerris, while in iberia and north africa the sexual generation host is cork oak, q. suber. over the last 500 years, a. kollari has expanded its range into northern europe, following human planting of q. cerris from italy and the balkans. we ask: (i) what is the genetic relationship between eas ... | 2001 | 11298986 |
| comparative phylogeography across two trophic levels: the oak gall wasp andricus kollari and its chalcid parasitoid megastigmus stigmatizans. | insect parasitoids are important components of many terrestrial ecosystems. however, relatively little is known about the mechanisms responsible for structuring their populations. here we investigate the ability of megastigmus stigmatizans, an oak gall wasp parasitoid, to track its host andricus kollari over two different timescales, and examine its current population structure across a divide in host population structure. the divide represents a transition in gall wasp host-plant species and of ... | 2006 | 16448414 |
| the phylogeographical clade trade: tracing the impact of human-mediated dispersal on the colonization of northern europe by the oak gallwasp andricus kollari. | human dispersal of organisms is an important process modifying natural patterns of biodiversity. such dispersal generates new patterns of genetic diversity that overlie natural phylogeographical signatures, allowing discrimination between alternative dispersal mechanisms. here we use allele frequency and dna sequence data to distinguish between alternative scenarios (unassisted range expansion and long range introduction) for the colonization of northern europe by an oak-feeding gallwasp, andric ... | 2007 | 17594446 |