Which of the following statements concerning the application of island biogeography theory is correct?
1
On a relatively large island close to the mainland, the species richness is expected to be low due to high extinction rates, despite high immigration rates.
2
For two islands of the same size but different distances from the mainland, the island closer to the mainland is predicted to have a higher species richness because of lower immigration rates.
3
In an archipelago, smaller islands will tend to have a higher rate of species turnover compared to larger islands, given that smaller islands have lower immigration and higher extinction rates.
4
An isolated island far from the mainland and another island of the same size but closer to the mainland are expected to have the same species richness if they are both equally old, according to the theory of island biogeography.