The species-area curve shown predicts that doubling island area will:
- Acheck_circle
Increase species number, but less than double (S = cA^z, z<1)
- B
Reduce species number due to competition
- C
Triple the species number
- D
Double the species number exactly
Explanation
Empirical species-area relationships fit S = cA^z with z usually 0.2-0.35; species number rises with area but with diminishing returns.