Q2.18. the equilibrium theory of island biogeography has been used to make predictions about how island size and distance as well as species richness affect immigration rates, extinction rates, and turnover rates. which of the following predictions does not follow from the theory of island biogeography? (note: the phrase "all else being equal" applies to each option.) immigration rates increase as an island's distance to mainland increases. extinction rates increase as the number of species on an island increases. extinction rates decrease as the size of an island increases. turnover rates decrease as the size of an island increases.