Island Biogeography Calculator

Apply MacArthur-Wilson equilibrium theory to predict island species richness.

Island Parameters

Island Area (km²)

Distance to Source (km)

Mainland Species Pool

Base Immigration Rate

Base Extinction Rate

Time Since Colonization (years)

Equilibrium Species

Current Species

45.0% of mainland pool

Adjusted Immigration (I)

After distance effect

0.0819

Adjusted Extinction (E)

After area effect

0.1000

Immigration at Equilibrium9.00 sp/yr

Extinction at Equilibrium9.00 sp/yr

Turnover Rate9.00 sp/yr

Time to Equilibrium (95%)16.5 years

Relaxation Remaining0.0%