I would just add to Mark's comments to say that the influence of habitat and predation are kind of two sides of the same coin. You take the case of ducks that nest, for example. Most of those species nest in the upland areas, the grass areas of the prairies. When there are fewer of those undisturbed grass areas for them to nest in, their nest success is reduced. It's easier for a skunk or a racoon or a fox to find those nests, and those predator populations are much larger because we've basically managed the prairie landscape to their advantage, as opposed to the nesting birds'.
In addition to the comments Mark made, I would add the fact that the support for management of that landscape through use and through conservation is the way to go. We are an agricultural community. We're going to be growing grain. We're going to be growing food, fibre. We can also grow ducks and grow big game on that landscape, but it has to be actively managed. One of the things I think that's unique about the hunting, fishing, and trapping perspective is that they understand the need to manage. It's not a matter of setting up little parks; that's impractical. You can't sustain an ecosystem on that basis in most cases. That support for active management is a very important core belief that exists within the sustainable use community.