A major goal of phylogeographic analysis using molecular markers is to understand the ecological and historical variables that influence genetic diversity within a species. Here, we used sequences of the mitochondrial Cox 1 gene and nuclear internal transcribed spacer to reconstruct its phylogeography and demographic history of the intertidal red seaweed Chondrus ocellatus over most of its geographical range in the Northwest P...

Aim We examined the biogeographical divergence, population‐level genetic differentiation and historical genetic exchange of the red macroalga Palmaria palmata in order to test whether populations on opposite sides of the North Atlantic underwent different demographic histories. Location North Atlantic rocky intertidal zones between c . 42 and 65° N. Methods We compiled mitochondrial (mt DNA ) cox 2–3 and plastid rpl 12– rps 31...