Table 4 shows the results of a sensitivity analysis of the “biodiversity
rotation age” to the discount rate. The optimal rotation age and the bird
density slightly decreased with a rise in the discount rate from 1 to 5%,
and remained constant as the discount rate increased from 5 to 10%.
This was because the “biodiversity rotation age” depended on variables
such as the bird density, which were not influenced by the discount
rate. The NPV was reduced significantly by 65% and 67% as the discount
rate increased from 1 to 5%, and from 5 to 10%, respectively. In conclusion,
the selection of a discount rate did not have a substantial on the
optimal rotation age and biodiversity, but did significantly affect the
profitability of planted forests to forest owners