Ed would say that in Darwin Evolution the very idea of 'creation of new species' is meaningless. In Superdeterminism, there are levels of organization that are connected. In Superdeterminism, the entire Universe is the highest level and much further down is all the life on Earth. This Earth life is further broken down into all the green plants, and all insects and all humans etc. The record of the history of life on Earth favors the Superdeterminism theory, more than the Darwin Evolution.
History of life is full of gaps and then bursts of biological new activity.
Your experiment was extremely shortsighted. It only gives a rate. If you had been at all thorough with regards to Evolution theory in question, you would have continued to see if any new species came into existence that can cope under that new environment. And in fact, your description of your experiment supports Superdeterminism more than Darwin Evolution. So, Ed, if Darwin Evolution were true, your radiation dosage should have killed the entire population.