Ecological Speciation by Sexual Selection on Good Genes

The below is an excerpt, and the additional highlighting is my own...

By means of a mathematical model, former postdoctoral fellow at the Santa Fe Institute and current postdoctoral fellow at the Institute of Ecology and Evolution at the University of Bern in Switzerland, Sander van Doorn and fellow colleagues demonstrate that disruptive ecological selection favors the evolution of sexual preferences for ornaments that signal local adaptation. Such preferences induce assortative mating with respect to ecological characters and enhance the strength of disruptive selection.

Sexual preference here means something more clinical then what many may use that phrase to mean. Think of it as advertising, a way to say "I'm a better mate selection if you plan on mating and raising young (if your species expects that) in a slightly warmer environment", and such. Or to make it even more accessible, think of it like dressing rich to attract people who want to marry someone rich. Only this is evolutionary, not a quick change of clothes.