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Effects of Grazing and Burning on Densities and
Habitats of Breeding Ducks in North Dakota


We thank W. R. Clark, D. H. Johnson, K. M. Kraft, W. E. Newton, T. L. Shaffer, and D. J. Twedt for advice on statistical analyses; D. H. Johnson, R. R. Koford, K. M. Kraft, A. B. Sargeant, K. A. Smith, and M. A. Sovada for comments on the manuscript; J. L. Pichl for assistance with establishment of the field study and R. K. Murphy for assistance with its continuation; K. A. Smith, manager of Lostwood NWR, for facilitating field work; S. A. Norland for figure preparation; and B. A. Hanson and C. L. Nustad for assistance with data management. Data were collected by many field assistants, all of whom we thank. The U.S. Fish and Wildlife Service, Iowa State University, and the Iowa Cooperative Fish and Wildlife Research Unit provided support and assistance during manuscript revision.
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