Perhaps represented by a Burrow/Den type object, this global resource would spawn an animal (or animals) of some multiple of Q higher than that of the surrounding terrain (Starting at 1.5x perhaps, and going up as high as 2.0x? 3.0?). These animals could potentially have some rare item that they drop as well, but I suspect that the multiplier to their Q would be sufficient. Given some of the Q nodes for animals in the world I could see Prime Hunting Grounds becoming hotly contested locations, especially when one considers that even an x2 multiplier is sufficient to produce animals of over 500Q-600Q in some areas.
I personally would like to see these animals be immune to things like palisades and brick walls for some period of time after they spawned to prevent them from being blocked in.