Marc Taïmour Jolly

TL;DR: It is argued that for marine organisms the genetic signatures of northern periglacial and southern refugia can be distinguished from one another, giving credence to recent climatic reconstructions with less extensive glaciation.

TL;DR: Signs of both persistence in small northern glacial refugia, and of northwards range expansion from regions situated closer to the Mediterranean are observed, however, whether the recolonization of the Northeast Atlantic by both species actually reflects separate interglacial periods is unclear with regards to the lack of molecular clock calibration in coastal polychaete species.

TL;DR: Channel populations exhibited bimodal match–mismatch curves due to two highly divergent haplotypes occurring at high frequencies and no overall heterozygote deficiencies at enzyme loci, suggesting respectively, a historic secondary contact between two differentiated populations followed by contemporary panmixia and a recent population expansion and recolonisation of Brittany with contemporary admixture of divergent populations.

TL;DR: Further knowledge is provided on the population dynamics of a univoltine species and its persistence in a highly dispersive environment via a shifting spatial mosaic through assessed spatial and temporal genetic structure of the populations present in the Baie de Seine.

TL;DR: To determine local levels of hybridization between these two species and to investigate the relative roles of pre- and post- zygotic isolation processes acting to decrease local hybridization patterns, mitochondrial DNA, allozymes and the Internal Transcribed Spacer 2 region of the ribosomal DNA were used.