Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole region

  • Published source details Reynolds R.E., Shaffer T.L., Renner R.W., Newton W.E. & Batt B.D.J. (2001) Impact of the Conservation Reserve Program on duck recruitment in the U.S. Prairie Pothole region. Journal of Wildlife Management, 65, 765-780.


This study is summarised as evidence for the following.

Action Category

Restore or create grasslands

Action Link
Bird Conservation
  1. Restore or create grasslands

    A replicated, randomised and controlled before-and-after trial study from May-July in 1992-1997 in North Dakota, South Dakota and Montana, USA (Reynolds et al. 2001), found that the nest success and reproductive rate of mallards Anas platyrhynchos, gadwalls A. strepera, blue-winged teals A. discors, northern shovelers A. clypeata and northern pintails A. acuta on 335 10.4 km2 plots increased significantly following the conversion of plots to perennial grassland by 1992. Estimated nest success and recruitment rates of the five species were 46% and 30% higher than in croplands. Mallard and blue-winged teal showed the largest (38 and 32% respectively) and gadwall showed the smallest (21%) gains in recruitment rate after restoration. Nest success was positively correlated with total planted grass cover in plots for all species except northern shoveler. Daily survival rate of duck nests in croplands from a pre-existing dataset from 1980-1984 (pre-restoration) and 1990-1994 (restoration) were used to compare treatment effects.


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