If I could interrupt as I don't have much time, and I apologize.
I vehemently disagree with your conclusion that private land, although small in area, contributes a small amount. Some of these in the southern working landscape are the most valuable and endangered landscapes in the entire country, so I think you might want to rethink that.
As to the management practices in these protected areas, what management practices are currently in place or do you envisage to protect ecological values? I'm thinking of things like burrowing owls, which require grazed lands. Do you see active management as being part of the protected areas program?