Describe the relationship between population size and probability of extinction for island bird species.
A) It is a linear relationship; the probability of extinction is constant regardless of the number of pairs
B) There is no relationship
C) It is an exponential relationship; the probability of extinction increases much more when populations fall below 100 pairs
D) The relationship is hump-shaped; probability of extinction increases when number of pairs is high or low.

Question

Quizplus · Accepted Answer

Studies have shown that there is an inverse relationship between population size and probability of extinction for island bird species. This relationship is exponential, with a steep increase in the probability of extinction as the population size falls below 100 pairs. Populations that are too large, however, may also face extinction risks due to limited resources and competition. Therefore, the relationship is hump-shaped.

Describe the Relationship Between Population Size and Probability of Extinction