For a given species an increased evolutionary rate would cause a decrease in

For a given species an increased evolutionary rate would cause a decrease in mutation rate.
>Three factors that would increase the rate of evolution would be the intensity of directional selection, an increase in the birth rate, hence an increase in the number of possible beneficial mutations, and an increase in the population size.>There are many limiting factors that might control the evolutionary rate of change. Physical or biological changes influencing the environment can play a major role in the rate of evolutionary change.