Donald Ludwig, Steve Carpenter, and W. Brock. 2003. Optimal phosphorus loading for a potentially eutrophic lake. Ecological Applications 13:1135–1152.

   FIG. I1. Percentage sensitivity in P_c for variation of -25% for fast parameter values, with discount rate = 0.05. The colors in the upper plot are restricted to the range from 0 to 50%, but the colors in the lower plot are unrestricted.