PROJECT NO. F-14-4(104) MISSOURI RIVER BRIDGE AT NIOBRARA, KNOX COUNTY, NEBRASKA, AND BON HOMME COUNTY, SOUTH DAKOTA.
DAKOTA PRAIRIE GRASSLANDS LAND AND RESOURCE MANAGEMENT PLANS 1999 REVISIONS; MONTANA, NEBRASKA, NORTH DAKOTA, SOUTH DAKOTA, AND WYOMING.
Concern over the status of species associated with prairie dog colonies has increased with the recent proposed listing of black-tailed prairie dogs (Cynomys ludovicianus). We monitored burrowing owl (Athene cunicularia) populations and prairie dog densities in 17 black-tailed prairie dog colonies in the Nebraska panhandle between 1990 and 1996. All prairie dog colonies were controlled at least once during the study. We observed a 63% decline in nesting pairs of burrowing owls and significant declines in burrow densities. Results indicated a time lag in owl response to changes in active burrow densities. However, in the later years of the study when burrow densities were lowest, owl numbers were positively correlated...
We used the United States National Grid to develop a sampling grid for monitoring programs in the Great Plains Landscape Conservation Cooperative, delineated by Bird Conservation Regions 18 and 19. Landscape Conservation Cooperatives are science based partnerships with the goal to inform and guide conservation at regional landscape levels. Developing a standardized sampling grid for a LCC is a new endeavor and is designed to reduce program costs, avoid repetition in sampling, and increase efficiency in monitoring programs. This is possible because the grid’s nationwide coverage, uniform starting point, and scalability allow researchers to expand their monitoring programs from a small, local level to a regional or...
Stream fragmentation alters the structure of aquatic communities on a global scale, generally through loss of native species. Among riverscapes in the Great Plains of North America, stream fragmentation and hydrologic alteration (flow regulation and dewatering) are implicated in the decline of native fish diversity. This study documents the spatio–temporal distribution of fish reproductive guilds in the fragmented Arkansas and Ninnescah rivers of south-central Kansas using retrospective analyses involving 63 years of fish community data. Pelagic-spawning fishes declined throughout the study area during 1950–2013, including Arkansas River shiner (Notropis girardi) last reported in 1983, plains minnow (Hybognathus...
Synopsis: This article outlines how wetlands can significantly reduce flooding in the Upper Mississippi watershed. The authors first provide a historical context by estimating the original and lost wetland storage capacities of the Upper Mississippi and Missouri River Basins. Historically, about 10% of the basin would have been classified as wetland in 1780. By 1980, wetland acreage had been reduced to only 4% of the basin, representing about 26 million acres of wetlands eliminated since 1780. The area of wetland restoration required to reduce the risk of future flooding adequately was estimated based on the total amount of excess floodwater beyond bank-full discharge that passed through the City of St. Louis during...
Biodiversity in stream networks is threatened globally by interactions between habitat fragmentation and altered hydrologic regimes. In the Great Plains of North America, stream networks are fragmented by 19,000 anthropogenic barriers, and ﬂow regimes are altered by surface water retention and groundwater extraction. We documented the distribution of anthropogenic barriers and dry stream segments in ﬁve basins covering the central Great Plains to assess effects of broad-scale environmental change on stream ﬁsh community structure and distribution of reproductive guilds. We used an information-theoretic approach to rank competing models in which fragmentation, discharge magnitude, and percentage of time streams had...
PAPILLION CREEK AND TRIBUTARIES LAKES, NEBRASKA (FINAL SUPPLEMENT III TO THE FINAL ENVIRONMENTAL IMPACT STATEMENT OF NOVEMBER 1971).
SILVICULTURAL STANDARDS AND GUIDELINES, ROCKY MOUNTAIN REGIONAL GUIDE, COLORADO, SOUTH DAKOTA, NEBRASKA, KANSAS, AND WYOMING (FINAL SUPPLEMENT TO THE FINAL ENVIRONMENTAL IMPACT STATEMENT OF APRIL 1983).
KINGSLEY DAM (FERC PROJECT NO. 1417) AND NORTH PLATTE/KEYSTONE DIVERSION DAM (FERC PROJECT NO. 1835) NEAR THE CONFLUENCE OF THE NORTH AND SOUTH PLATTE RIVERS, NEBRASKA.
PROJECT NO. F-14-4(104) MISSOURI RIVER BRIDGE AT NIOBRARA, KNOX COUNTY, NEBRASKA, AND NON HOMME COUNTY, SOUTH DAKOTA.
MISSOURI, NIOBRARA, AND VERDIGRE CREEK NATIONAL RECREATIONAL RIVERS; BON HOMME, CHARLES MIX, AND GREGORY COUNTIES, SOUTH DAKOTA, AND BOYD AND KNOX COUNTIES, NEBRASKA.
Conclusions:Wetlands and riparian zones should be strategically placed in watersheds to optimize nitrogen removal, as, for example, in tile-drained farmlands prone to high concentrations of nitrateThresholds/Learnings:Restoring 10 million hectares of riparian zones and wetlands, representing 3.4% of the Mississippi River basin, would reduce nitrogen in the Mississippi River Basin and its tributaries by an average of 40%