Estimated number of breeding pairs of Savannah sparrow based on the amount of grass, trees, and/or hay in the landscape. Landscape scale varied from 1/4- to 2-mile radius depending on the species. Pair estimates were calculated for grass patches >=1 ha, extrapolated to 40-ac cells, then smoothed by averaging over a 1-mile radius. Models were based on point count surveys conducted in 2003-2005 throughout the Tallgrass Prairie Pothole Region. Point count locations were stratified by cover type, the amount of grass in the landscape, and USFWS Wetland Management District boundaries. Landcover data were derived from 2000 Thematic Mapper imagery. Grid values = number of breeding pairs per 30-m pixel.
Reaches on the USEPA 303d list of impaired waterways where causes and sources are from agriculture nutrients within the Mississippi River Basin. Source: http://www.epa.gov/waters/data/rad_303d_20140804_fgdb.zip. Downloaded May 2015.
The purpose of this map is to provide a georeferenced characterization of vegetation in the early stages of Euro-American settlement. One of the research uses for the surveys nationally is for presettlement vegetation. This data can be used to analyze presettlement vegetation patterns for the purpose of determining natural community potential, productivity indexes, and patterns of natural disturbance. The area of the original plat maps were townships; use of the data at a larger scale would not be appropriate.In Illinois, the surveys began in 1804 and were largely completed by 1843. The surveyors moved across the state laying out a rectangular grid system, known as the Public Land Survey System (PLS or PLSS). They...
This dataset displays polygon data for Critical Bird Habitat (Endangered Species Act-Listed) in the United States.
Percent of cropland (CDL 2013) within Mississippi River Basin HUC-8 basins (excludes hay, pasture, orchards, and vineyards).
The Virginia Natural Landscape Assessment (VaNLA) was a landscape-scale GIS analysis that identified, prioritized, and linked important lands to form natural land networks throughout Virginia. Using land cover data derived from satellite imagery, the VaNLA identified large, unfragmented cores, patches of natural land with at least 100 acres of interior cover. Cores provide habitat for a wide range of species, from interior-dependent forest species to habitat generalists, as well as for species that utilize marsh and maritime habitats. The most ecologically significant cores were linked by landscape corridors. Lower-ranked cores and fragments of natural land that intersected landscape corridors were added as corridor...
Estimated number of breeding pairs of Dickcissel based on the amount of grass, trees, and/or hay in the landscape. Landscape scale varied from 1/4- to 2-mile radius depending on the species. Pair estimates were calculated for grass patches >=1 ha, extrapolated to 40-ac cells, then smoothed by averaging over a 1-mile radius. Models were based on point count surveys conducted in 2003-2005 throughout the Tallgrass Prairie Pothole Region. Point count locations were stratified by cover type, the amount of grass in the landscape, and USFWS Wetland Management District boundaries. Landcover data were derived from 2000 Thematic Mapper imagery. Grid values = number of breeding pairs per 30-m pixel.
Conservation priorities have been identified for each river basin at the cataloging unit or stream reach scale and were categorized using two tiers to indicate relative importance when considering the limited resources available for conservation initiatives. The recommendations were developed by Commission biologists through review of their field data as well as data from several agencies and research organizations. The review considered a combination of factors such as the presence of federal- or state-listed species; distribution of priority species; high species diversity; unique habitats, or high-quality habitats in the subbasin; and the importance of the watershed to downstream populations. Priority areas identified...
These datasets represent model results from Rabotyagov et. al. 2014. Cost-effective targeting of conservation investments to reduce the northern Gulf of Mexico hypoxic zone. Proceedings of the National Academy of Sciences. 111 (52): 18530-18535. The authors developed an integrated assessment model linking the water quality effects of cropland conservation investment decisions on the more than 550 agricultural subwatersheds that deliver nutrients into the Gulf of Mexico with a hypoxic zone model. The model was used to identify the most cost-effective subwatersheds to target for cropland conservation investments. The 60% reduction [60PCT] model could cost-effectively reduce the area of the hypoxic zone to 5,000 km2,...
Grassland bird habitat spatial data from the Upper Mississippi River and Great Lakes Region Joint Venture (UMRGL JV) 2007 Implementation Plan.
Mississippi River Basin Gridded SSURGO mapunits where "pwsl1pomu" (wetland potential) is at least 60 or at least 50 and "drclassdcd" (Drainage Class - Dominant Condition) is poorly or very poorly drained. These mapunits represent those with the highest wetland potential based on these criteria.
Value for woodland breeding birds based on woodland breeding bird abundances and habitat models.
Potential yields and harvested area, by county, within the Mississippi River Basin, of switchgrass planted for biofuel in the year 2030 from the USDOE Billion Ton Update baseline scenario at a farmgate price of $60/dry ton or less. Source: USDOE Billion Ton Update, Scenario: BLY+EC1_BLT (Baseline Yield with 1% Increase in Energy Crops); Year: 2030.
Historic land cover datasets from Illinois, Iowa, Minnesota, Missouri, Ohio, and Wisconsin.
Areas identified in the Minnesota Pheasant Action Plan to target habitat enhancement and protection in complexes at least 9 square miles in size where a goal of 40 percent permanent protection can be met within the timeframe of the plan. The complexes identify the best places for pheasant production and focused protection efforts on those areas to create permanent habitat complexes. Ranking of the complexes was based on current conditions. For instance, if a complex is at 38% permanent protection, it scores very high since with only a little effort 40% protection can be achieved, conversely. A place that was 20% scored low. The complexes identify the best places for pheasant production and focused protection efforts...
This dataset is made up of features aggregated from Ecoregional Assessments as well as other planning methodologies used across The Nature Conservancy to identify areas of biodiversity significance and prioritize conservation action. More information about ecoregional assesments and other conservation planning methodologies is available at The Nature Conservancy's Conservation Gateway, the Ecoregional Assessment Status Tool (EAST), and at http://maps.tnc.org. This dataset provides a vision for conservation success for ecological systems, natural communities and species representative of an ecoregion by showing the boundaries of areas that The Nature Conservancy has prioritized for conservation within the Mississippi...