USDA’s Conservation Assessment Effects Project has just released two extensive reviews of the effects of agricultural conservation practices – like those used in CRP and other conservation programs (public announcement here). Part A addresses terrestrial habitats and Part B addresses aquatic habitats. Even better is the dynamic bibliography.
Here is a good summary about the effects of European conservation programs on mammals. The applications to North American programs are easy to see. Good thing, too, because N. American research on mammals in CRP and other programs is sorely lacking.
McDonald, D.W., F.H. Tattersall, K.M. Service, L.G.Firbank, and R. E. Feber. 2007. Mammals, agric-environment schemes and set-aside – what are the putative benefits. Mammal Review 37:259-277.