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Eurasian watermilfoil (Myriophyllum spicatum L.) has become a nuisance plant species in North America. In recent years, it has become increasingly abundant in the Upper Mississippi River System (UMRS) and at some locations has regularly colonized areas which had previously hosted wild celery (Vallisneria americana Michx.), an important waterfowl food species. In summer 1993, initial efforts were undertaken to understand the environmental requisites of Myriophyllum in the UMRS. To accomplish this, a sampling grid was established within a Myriophyllum bed in Pool 7 near La Crosse, Wisconsin. Transects were spaced at 18.3-m (60-ft) intervals, with sample sites 9.15 m (30 ft) apart on transects. In total, 164 sites...
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The 1993 Flood on the Upper Mississippi and Missouri Rivers is now considered the largest flooding event on these river basins. Not only were many miles of the rivers flooded, but there was also a significant amount of flooding to the interior of the country. More than 420 counties in all the midwestern states were declared disaster areas. Stages were exceeded many locations, hundreds of levees either failed or were overtopped, more than 500 scour holes developed, the rivers scoured their beds at numerous locations, sediments were deposited at many other locations, and the rivers attempted to create new channels and/or cutoffs during the peak periods. This paper is not intended to summarize the various factors associated...
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The effects of changing levee and water level management practices on present habitat types and amounts on the Upper Mississippi River floodplain at Pool 25 were predicted. The intent of the study was to investigate a broad range of plans that would provide coarse resolution information and the tools needed to study specific plans in the future. Two conditions were investigated for levees: the present levee system and all levees removed. Five water level management plans were studied: the present plan, two plans that would increase water levels, and two plans that would decrease water levels. The levee and water level management variables resulted in a total of ten unique management alternatives. Each was studied...
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Unionid mussels were collected by quadrat sampling at three mussel beds in Reach 15 of the Upper Mississippi River (UMR) between July 1994 and September 1995. A total of 7,107 unionids were collected representing 26 species, including the federally endangered Lampsilis higginsi, state endangered Plethobasus cyphyus and Cumberlandia monodonta, and state threatened Ellipsaria lineolata. Mean densities at our study sites ranged from 53.4 to 118.3 mussels/m2. Comparisons with data collected at these same sites in the early 1980s revealed significant declines in unionid abundance, sporadic recruitment, and extremely slow growth rates. Height-frequency histograms for commercially harvested species remain truncated at...
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The likelihood of 1- or 2-foot drawdowns, and the area affected by such alternative drawdowns, was estimated for Pool 13 on the Upper Mississippi River. Minimum water surface (elevation) requirements were compared to computed water surface profiles to determine a critical low flow that would allow a navigation channel 400 feet wide and 10.5 feet deep. An upper limit on flow was established based on the flow at which open river conditions would exist for a given drawdown. The range in flows that would allow for a drawdown was used to estimate success rates using historical daily discharge data. Success rates were determined for a variety of drawdown durations between two time periods, May 1 August 15 and June 15...
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The suspended sediment budget for Pool 13 of the Mississippi River and La Grange Pool of the Illinois River was examined over a 3-yr period (October 1995 through September 1997). Pool 13 output was between 3.07 and 3.64 million t (metric tons) of suspended sediment annually during the study period. Loads to Pool 13 were dominated by those delivered by the Mississippi River (76%, 74%, and 66% in the 1995, 1996, and 1997 water years, respectively). Pool 13 exhibited sediment export (output greater than input) in 1995, a balance in 1996, and marked sediment trapping (output less than input) in 1997. Within the three study years, Pool 13 received its highest water and sediment loads during spring (March through May)...
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Using Long Term Resource Monitoring Program data collected from impounded (Pool 26) and unimpounded (Open River) reaches of the upper Mississippi River, we investigated population dynamics of flathead catfish Pylodictis olivaris, channel catfish Ictalurus punctatus, and blue catfish I. furcatusfrom random sites located in side channel border (SCB) and main channel border (MCB) habitats. Objectives were to (1) compare trends (1993–2007) of three catfishes collected in Pool 26 and Open River reaches of the upper Mississippi River, and (2) provide needed information to managers on population dynamics through time using a binary gear approach of active (i.e., daytime electrofishing) and passive gears (hoopnetting)....
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Premise of the study: Consistent with the self-thinning law of plant population ecology, Niklas et al. in 2003 proposed that stem size-density distributions (SDDs) of multispecies forest communities should change in very predictable ways as a function of the effects of past disturbances on average tree size. To date, empirical tests of this hypothesis have not been pursued in floodplain settings. Methods: SDDs were constructed using tree stem-size and density data from forest plots positioned along a flood frequency and duration gradient in the Upper Mississippi River floodplain. Key Results: As flooding (both frequency and duration) increased, several small tree species were eliminated from forest plots and...
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Geographic patterns can change through time and/or across space, and these changes can lead to differences in the movement pattern and body condition of organisms, their interactions with each other and their environment, and ultimately lead to population and community-level changes. When quantifying landscape patterns using remotely sensed data, it is important to recognize that each pixel (i.e. picture element) has a temporal and spatial context. A pixel’s temporal context refers to its past and present classification. The spatial context of a pixel depends on the classification of neighbouring pixels, and the size of the area considered as the neighbourhood. Despite the fact that pixels are the basic unit of...
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These layers show land ownership and status of all Canadian and U.S. lands that fall within the boundaries of the Great Northern Landscae Conservation Cooperative. Layers were compiled from various sources, each with it’s own metadata reference file.
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There is a great deal of interest in whether and how Alaska’s precipitation is changing but little agreement in the existing peer-reviewed literature. To provide insight on this question, we have selected three commonly used 0.5° resolution gridded precipitation products that have long-term monthly data coverage (Climatic Research Unit TS3.10.1, Global Precipitation Climatology Centre Full Data Reanalysis version 5, and University of Delaware version 2.01) and evaluated their homogeneity and trends with multiple methods over two periods, 1950–2008 and 1980–2008. All three data sets displayed common broadscale features of Alaska’s precipitation climatology, but there were substantial differences between them in terms...
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The Healthy Beaches for People and Fish project was completed by Friends of the San Juans in partnership with Coastal Geologic Services, Salish Sea Biological and the Washington Department of Fish and Wildlife in 2014. Project approach and work was guided by a technical advisory group, which included representatives from The University of Washington, United States Geological Survey, Puget Sound Partnership, Skagit River Systems Cooperative, Samish Indian Nation, San Juan County Public Works, San Juan County Salmon Recovery Lead Entity, The Tulalip Tribes, Padilla Bay National Estuarine Research Reserve and the Washington State Departments of Ecology, Natural Resources and Fish and Wildlife. The project contained...
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We used publically available data on duck breeding distribution and recently compiled geospatialdata on upland habitat and environmental conditions to develop a spatially explicitmodel of breeding duck populations across the entire Prairie Pothole Region (PPR). Ourspatial population models were able to identify key areas for duck conservation across thePPR and predict between 62.1 – 79.1% (68.4% avg.) of the variation in duck counts by yearfrom 2002 – 2010. The median difference in observed vs. predicted duck counts at a transectsegment level was 4.6 ducks. Our models are the first seamless spatially explicit modelsof waterfowl abundance across the entire PPR and represent an initial step toward jointconservation...
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Climate change vulnerability assessments are commonly used to identify species or populations at risk from global climate change, but few translate impact assessments to climate change adaptation actions. Furthermore, most climate change adaptation efforts emphasize where to implement management actions, whereas timing remains largely overlooked. The rate of modern climate change introduces urgency in evaluating whether delaying conservation actions compromises their efficacy for reaching important conservation targets. We evaluated the importance of multiple climate change adaptation strategies including timing of actions on preventing extinctions for a threatened climate-sensitive species, the Eastern Massasauga...
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Understanding how climate change and variability will impact grassland ecosystems is crucial for successful grassland management in the 21st century. In 2020, the U.S. Geological Survey North Central Climate Adaptation Science Center (USGS NC CASC) began a project to establish a baseline of information to best serve grassland managers (that is, those who develop grassland management plans or implement those plans on the ground) at Federal, State, and Tribal agen-cies and nongovernmental organizations to help meet regional grassland management goals. This project “A Synthesis of Climate Impacts, Stakeholder Needs, and Adaptation in Northern Great Plains Grassland Ecosystems” (hereafter, the Grasslands Synthesis Project),...
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Floods, spatially complex water flows, and organism movements all generate important fluxes of aquatic-derived materials into terrestrial habitats, counteracting the gravity-driven downhill transport of matter from terrestrial-to-aquatic ecosystems. The magnitude of these aquatic subsidies isoften smaller than terrestrial subsidies to aquatic ecosystems but higher in nutritional quality, energy density, and nutrient concentration. The lateral extent of biological aquatic subsidies is typically small, extending only a few meters into riparian habitat; however, terrestrial consumers often aggregate on shorelines to capitalize on these high-quality resources. Although the ecological effects of aquatic subsidies remain...
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How local geomorphic and hydrologic features mediate the sensitivity of stream thermal regimes to variation in climatic conditions remains a critical uncertainty in understanding aquatic ecosystem responses to climate change. We used stable isotopes of hydrogen and oxygen to estimate contributions of snow and rainfall to 80 boreal streams and show that differences in snow contribution are controlled by watershed topography. Time series analysis of stream thermal regimes revealed that streams in rain-dominated, low-elevation watersheds were 5–8 times more sensitive to variation in summer air temperature compared to streams draining steeper topography whose flows were dominated by snowmelt. This effect was more pronounced...
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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...
Categories: Data, Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CATFISHES/MINNOWS, Colorado, Colorado, FISH, Federal resource managers, All tags...


map background search result map search result map Estimated potential for sage-grouse movement Spatial surfacing of point data for Myriophyllum investigations Impacts of 1993 floods on the Upper Mississippi and Missouri River Basins in the USA Pool 25: Water level management alternatives and their effects on habitat A comprehensive evaluation of three mussel beds in Reach 15 of the Upper Mississippi River Pool 13 drawdown: Predicting success rates and affected areas A suspended sediment budget for Pool 13 and La Grange Pool of the Upper Mississippi River System Population Trends of Flathead Catfish, Channel Catfish, and Blue Catfish in Impounded and Unimpounded Reaches of the Upper Mississippi River (1993-2007) Effects of flood frequency and duration on the allometry of community-level stem size-density distributions in a floodplain forest Curve Fit: a pixel-level raster regression tool for mapping spatial patterns Sea Level Rise Vulnerability Assessment for San Juan County, Washington GNLCC Jurisdictional Boundaries A Biological Classification of Rivers and Streams in Denali National Park- A Foundation for Long-Term Ecological Monitoring (LTEM) Building the Foundation for International Conservation Planning for Breeding Ducks across the U.S. and Canadian Border Reconciling precipitation trends in Alaska: 2. Gridded data analyses Watershed geomorphology and snowmelt control stream thermal sensitivity to air temperature Subsidies of Aquatic Resources in Terrestrial Ecosystems Publication: Fragmentation and dewatering transform Great Plains stream fish communities Publication: Delaying conservation actions matters for species vulnerable to climate change Grassland Management Priorities for the North Central Region Estimated potential for sage-grouse movement A comprehensive evaluation of three mussel beds in Reach 15 of the Upper Mississippi River Spatial surfacing of point data for Myriophyllum investigations Pool 13 drawdown: Predicting success rates and affected areas Sea Level Rise Vulnerability Assessment for San Juan County, Washington A suspended sediment budget for Pool 13 and La Grange Pool of the Upper Mississippi River System A Biological Classification of Rivers and Streams in Denali National Park- A Foundation for Long-Term Ecological Monitoring (LTEM) Watershed geomorphology and snowmelt control stream thermal sensitivity to air temperature Subsidies of Aquatic Resources in Terrestrial Ecosystems Publication: Fragmentation and dewatering transform Great Plains stream fish communities Impacts of 1993 floods on the Upper Mississippi and Missouri River Basins in the USA Population Trends of Flathead Catfish, Channel Catfish, and Blue Catfish in Impounded and Unimpounded Reaches of the Upper Mississippi River (1993-2007) Effects of flood frequency and duration on the allometry of community-level stem size-density distributions in a floodplain forest Curve Fit: a pixel-level raster regression tool for mapping spatial patterns Grassland Management Priorities for the North Central Region Building the Foundation for International Conservation Planning for Breeding Ducks across the U.S. and Canadian Border Publication: Delaying conservation actions matters for species vulnerable to climate change GNLCC Jurisdictional Boundaries Reconciling precipitation trends in Alaska: 2. Gridded data analyses