Lake Christina Reclamation: Ecosystem Consequences of Biomanipulation
State Wildlife Grants Program Division of Ecological Services Minnesota Department of Natural Resources Final Report to the State Wildlife Grant Program Lake Christina Reclamation: Ecosystem Consequences of Biomanipulation Project Collaborators: Mark A. Hanson Wetland Wildlife Populations & Research Group, MNDNR Bemidji, MN Joseph Allen Department of Biological Sciences North Dakota State University, Fargo, ND Deborah Buitron Department of Biological Sciences North Dakota State University, Fargo, ND Malcolm G. Butler Department of Biological Sciences North Dakota State University, Fargo, ND Todd Call MN DNR Glenwood, MN Thomas Carlson MN DNR Fergus Falls, MN Nicole Hansel-Welch MN DNR Brainerd, MN Katie Haws MDNR Bemidji, MN Melissa Konsti Department of Biological Sciences North Dakota State University, Fargo, ND Dan McEwen Department of Biological Sciences North Dakota State University, Fargo, ND Gary Nuechterlein Department of Biological Sciences North Dakota State University, Fargo, ND Kyle D. Zimmer Department of Biology University of St. Thomas, St. Paul, MN 1 Contents I. Background and Project Description 3 II. Fall Waterfowl Survey Summaries and Trends 6 III. Post-Treatment Assessment of the Fish Community in Lake Christina 9 IV. Limnological Monitoring of lake Christina, 2004-2005 26 V. Submerged Aquatic Plants: Status and Trends 34 VI. Consequences of Biomanipulation on Use by Nongame Waterbirds 38 2 I. Background and Project Description Lake Christina, a 3949-acre shallow lake in Douglas County in west-central Minnesota, is nationally recognized as a critical staging area for migrating canvasbacks, and also is a breeding location for a number of unique nongame bird species. Since the 1950s, the lake has alternated between ecological extremes, sometimes characterized by favorable conditions, and at other times of little use as waterfowl habitat.
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