Fig. 3. Example 2 of the variation in the amount of caribou habitat (h) over 1000 yr. For the first 300 yr, the stochastic mean reverting process that allows harvesting is used to determine the supply of habitat. After 300 yr, the critical stopping threshold h* is reached, harvesting stops, and the variation in the amount of habitat then follows the stochastic mean reverting process, which bans timber harvesting.