Recent phylogeographic studies have overturned three paradigms for the origins of marine
biodiversity.(i) Physical (allopatric) isolation is not the sole avenue for marine speciation …

The most common classification of modes of speciation begins with the spatial context in
which divergence occurs: sympatric, parapatric or allopatric. This classification is …

The origin of biological diversity, via the formation of new species, can be inextricably linked
to adaptation to the ecological environment. Specifically, ecological processes are central to …

Speciation is a key evolutionary process that is not yet fully understood. Combining
population genomic and ecological data from multiple diverging pairs of marine snails …

Parallel evolution of similar phenotypes provides strong evidence for the operation of natural
selection. Where these phenotypes contribute to reproductive isolation, they further support …

Cave organisms occupy a special place in evolutionary biology because convergent
morphologies of many species demonstrate repeatability in evolution even as they obscure …

Ecological speciation occurs when adaptation to different environments or resources causes
the evolution of reproductive isolation. This process is now thought to be very important in …

Distinct ecotypes of the snail Littorina saxatilis, each linked to a specific shore microhabitat,
form a mosaic-like pattern with narrow hybrid zones in between, over which gene flow is 10 …

Divergent selection between contrasting habitats can sometimes drive adaptive divergence
and the evolution of reproductive isolation in the face of initially high gene flow.“Progress” …

When incompletely isolated taxa coexist in a patchy environment (eg mosaic hybrid zones,
host-race complexes), patterns of variation may differ between selected traits/genes and …