I thought I'd share something cool I learned in my macroevolution class today because it relates back to some of the things we've been learning in CCS too, and it's pretty interesting. So, for those of you who haven't encountered the term before, adaptive radiation refers to the diversification of species to fill certain niches. This relates back to evolution because a HUGE amount of adaptive radiation occurs after mass extinctions (when there are tons of niches to be filled). This is how diversity recovered after such an event. The speciation with adaptive radiation occurs within a rapidly multiplying lineage. Schluter defined the four criteria for adaptive radiation to be: common ancestry, phenotype-environment correlation, trait utility and rapid speciation.
So this is cool and all...and (currently) a pretty essential concept in biology but, a specific lineage of lizards is making some scientists re-think this concept altogether. TAKE A LOOK!