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The Connecticut Surficial Materials and Quaternary Geology Quadrangle information was initially compiled at 1:24,000 scale (1 inch = 2,000 feet) then recompiled for 2 statewide 1:125,000-scale maps. (1) Surficial Materials Quadrangle Map of Connecticut by Stone, J.R., Schafer, J.P., London, E.H. and Thompson, W.B., 1992, U.S. Geological Survey, 2 sheets, scale 1:125,000. (PDF, 26 Mb). (2) Quaternary Geologic Map of Connecticut and Long Island Sound Basin by Stone, J.R., Schafer, J.P., London, E.H., DiGiacomo-Cohen, M.L., Lewis, R.L., and Thompson, W.B., 2005, U.S. Geological Survey Scientific Investigation Map 2784, 2 sheets, scale 1:125,000, and pamphlet, 71 p.(PDF, 56 Mb). These Connecticut Quaternary and Surficial...
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A hydrologic model was developed as part of the Southeast Regional Assessment Project using the Precipitation Runoff Modeling System (PRMS), a deterministic, distributed-parameter, process-based system that simulates the effects of precipitation, temperature, and land use on basin hydrology. Streamflow and other components of the hydrologic cycle simulated by PRMS were used to inform other types of simulations such as water-temperature, hydrodynamic, and ecosystem-dynamics simulations.
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The Virginia Department of Transportation (VDOT) Geologic Sections dataset consists of site-specific, large-scale geologic cross-sections (composite sheets). These sections were acquired from VDOT in order to save them from disposal. There are 5,500 geological profiles created for highway construction projects containing extensive core, auger and split-spoon logs at scales of 1:50 and 1:100 providing a unique record of subsurface geological and geotechnical data along roadways throughout Virginia. The thousands of feet of vertical subsurface data represents millions of dollars of investment in data acquisition by VDOT. The sections are useful as indicators of subsurface geology in large parts of Virginia. ...
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The Prairie Pothole Region spans parts of North and South Dakota, Minnesota, Montana, Iowa and south-central Canada and contains millions of wetlands that provide habitat for breeding and migrating birds. Because it is the continent’s most important breeding area for waterfowl, conservation and management largely focuses on protecting habitat for nesting ducks. However, other wetland-dependent birds also rely on this region, and it is important to understand the degree to which habitat conserved for ducks provides habitat for other species, and how the quality of this habitat will be affected by climate change. Project researchers tested whether waterfowl are effective representatives, or surrogates, for other wetland-dependent...
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Current national data resources for GAP include three primary data sets – land cover, protected areas, and species. Land Cover: The GAP/LANDFIRE National Terrestrial Ecosystems data, based on the NatureServe Ecological Systems Classification, are the foundation of the most detailed, consistent map of vegetation available for the United States. These data facilitate the planning and management for biological diversity on a regional and national scale. Learn more about GAP land cover data here: https://www.usgs.gov/core-science-systems/science-analytics-and-synthesis/gap/science/land-cover Protected Areas: The Protected Areas Database of the United States (PAD-US) is a national geodatabase, created by USGS GAP,...
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Cutthroat trout (CT; Oncorhynchus clarki ssp.) are extremely imperiled owing to a variety of stressors. Changing climate is adding to these stressors that have already relegated CT in the Southern Rocky Mountains to less than 35% of their native habitat. The Rio Grande CT (O. c. virginalis) occupies 12% of its native range and is currently under review for ESA listing as federally threatened. Changing thermal regimes, hydroclimate, and disturbance regimes will continue to alter the remaining habitat of Rio Grande CT. An understanding the status and trends of Rio Grande CT thermal habitats and the vulnerability of these habitats to climate driven changes in temperature and stochastic disturbance regimes would enable...
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High-latitude regions are experiencing rapid and extensive changes in ecosystem composition and function as the result of increases in average air temperature. Increasing air temperatures have led to widespread thawing and degradation of permafrost, which in turn has affected ecosystems, socioeconomics, and the carbon cycle of high latitudes. Research shows that the distribution of permafrost is heterogeneous in nature and that permafrost responds to a wide range of ecological factors. Here we overcome complex interactions between surface and subsurface conditions to map near-surface permafrost using decision-tree models, field observations, remotely sensed and derived data, and climatic indices. The resultant dataset...
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Up to 12 different prey fish species were sampled with a 12-m bottom trawl during April, July, and September along two Lake Huron transects (Thunder Bay, Hammond Bay). At each transect in each month, two replicate 10-min tows were conducted at each of three depths (18, 46, 82 m) during the day and night. Once the fish were onboard in a given tow, they were sorted to species, weighed (in aggregate), and up to 50 individuals per species were measured to the nearest total length.
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Researchers from North Carolina State University and the USGS integrated models of urbanization and vegetation dynamics with the regional climate models to predict vegetation dynamics and assess how landscape change could impact priority species, including North American land birds. This integrated ensemble of models can be used to predict locations where responses to climate change are most likely to occur, expressing results in terms of species persistence to help resource managers understand the long-term sustainability of bird populations.
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The National Fish Habitat Partnership (NFHP) Data Catalog is a centralized location for all publically released datasets, tools and documents from the National Fish Habitat Partnership (NFHP) community. To help search, visualize, and explore data products consider using the NFHP Data Catalog Viewer.
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This collection (known internally to Maryland Geological Survey as Component 4) consists of 375 22-inch by 34-inch photo-mosaic index maps dating from 1936-1980. These index maps depict flight lines and frame numbers for two components of the MGS Aerial Photograph Collection: 1) Component 1: County-Based Aerial Photographs (https://www.sciencebase.gov/catalog/item/4f4e4a94e4b07f02db658dba); and 2) Component 2: MD Barrier Island Aerial Photographs (Enlargements) (https://www.sciencebase.gov/catalog/item/4f4e4aafe4b07f02db66cf18). These index maps serve as a finding aid for these two components. All of the index maps have been scanned (most to JPG, PDF, and TIF format). Digital imagery (PDF) for the majority...
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The Gap Analysis Program's (GAP) Species Viewer allows users to explore, download, and create maps of vertebrate species ranges and models developed by GAP. The Viewer displays data on vertebrate species ranges and distribution models for the continental U.S. as well as Alaska, Hawaii, Puerto Rico, and U.S. Virgin Islands. More specifically, species distribution models based on deductive modeling of habitat associations are displayed across entire species ranges for over 2000 species. The goal is to build species range maps and distribution models with the best available data for assessing conservation status, conservation planning, and research (e.g., climate change impacts). Ranges are represented by 12-digit...
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A team of USGS and academic researchers developed a comprehensive web-based dataset of high-resolution (or ‘downscaled’) climate change projections, enabling scientists and decision-makers to better assess climate related ecosystem impacts. The research team implemented a three-part plan to provide high resolution climate data for the impact modeling community. First, a database was developed of up-to-date and state-of-the-art downscaled climate projections for the U.S., using a range of plausible future greenhouse gas emission scenarios. Second, a series of workshops were held to solicit input about climate-related data needs and to discuss best practices for accessing and using downscaled climate projections....
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The broad range of complex factors influencing coastal systems contribute to large uncertainties in predicting long-term sea level rise impacts. Researchers demonstrated the capabilities of a Bayesian network (BN) to predict long-term shoreline change associated with sea level rise and make quantitative assessments for predicting uncertainty. A BN was used to define relationships between driving forces, geologic constraints, and coastal response for the U.S. Atlantic coast that include observations of local rates of relative sea level rise, wave height, tide range, geomorphic classification, coastal slope, and shoreline change rate. The BN was used to make probabilistic predictions of shoreline retreat in response...
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Gap Analysis Project (GAP) habitat maps are predictions of the spatial distribution of suitable environmental and land cover conditions within the United States for individual species. Mapped areas represent places where the environment is suitable for the species to occur (i.e. suitable to support one or more life history requirements for breeding, resting, or foraging), while areas not included in the map are those predicted to be unsuitable for the species. While the actual distributions of many species are likely to be habitat limited, suitable habitat will not always be occupied because of population dynamics and species interactions. Furthermore, these maps correspond to midscale characterizations of landscapes,...
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Dataset consists of individual rasters, each describing a separate geochemical or geophysical attribute. See "Child Items" to browse and select desired rasters, download associated service definition file, and unzip to access rasters formatted as geoTiffs.
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The Southeastern United States spans a broad range of physiographic settings and maintains exceptionally high levels of faunal diversity. Unfortunately, many of these ecosystems are increasingly under threat due to rapid human development, and management agencies are increasingly aware of the potential effects that climate change will have on these ecosystems. Natural resource managers and conservation planners can be effective at preserving ecosystems in the face of these stressors only if they can adapt current conservation efforts to increase the overall resilience of the system. Climate change, in particular, challenges many of the basic assumptions used by conservation planners and managers. Previous conservation...
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USGS researchers assessed how climate change can affect land cover and flow in river systems, examining a variety of resolutions for detecting and projecting the conditions of aquatic habitats and species.
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The USGS and South Atlantic LCC worked with stakeholders and managers across the Southeast to identify and assess landscape-level strategies for conserving multiple species. These strategies incorporated predictions from downscaled climate models, sea level rise, and changes to aquatic and terrestrial habitats.


map background search result map search result map County Aerial Photograph Index Maps, 1936-1980 NFHP Data Catalog GAP Species Viewer Understanding How Climate and Land Use Change Will Impact Wetland-Dependent Birds: Are Waterfowl Effective Surrogates for Other Species? Connecticut Quaternary and Surficial Geology Quadrangle Current National Data Resources for the Gap Analysis Project U.S. Geological Survey - Gap Analysis Project Species Habitat Maps CONUS_2001 Geochemical and Geophysical Characteristics of the Conterminous United States Seasonal benthic prey fish densities in Lake Huron, offshore of Hammond Bay and Alpena, Michigan (2012) Sites and Basin Shapefiles for GLRI Toxic Contaminant Loading Project SERAP:  The Effects of Climate Change on Aquatic Species and Habitat in the Southeast SERAP: Decision Support for Stakeholders and Managers SERAP:  Comprehensive Web-based Climate Change Projections: Downscaled Maps and Data SERAP:  Modeling of Hydrologic Systems SERAP:  Assessment of Shoreline Retreat in Response to Sea Level Rise Southeast Regional Assessment Project (SERAP): Assessing Global Change Impacts on Natural and Human Systems in the Southeast SERAP:  Assessment of Climate and Land Use Change Impacts on Terrestrial Species Identifying refuge streams and lakes for Rio Grande cutthroat trout in a changing climate Geologic Sections Collection VDOT (Virginia) Probabilistic estimates of the distribution of near-surface permafrost in Alaska Seasonal benthic prey fish densities in Lake Huron, offshore of Hammond Bay and Alpena, Michigan (2012) Connecticut Quaternary and Surficial Geology Quadrangle Identifying refuge streams and lakes for Rio Grande cutthroat trout in a changing climate SERAP:  Assessment of Shoreline Retreat in Response to Sea Level Rise County Aerial Photograph Index Maps, 1936-1980 SERAP:  The Effects of Climate Change on Aquatic Species and Habitat in the Southeast SERAP:  Modeling of Hydrologic Systems Geologic Sections Collection VDOT (Virginia) SERAP: Decision Support for Stakeholders and Managers Understanding How Climate and Land Use Change Will Impact Wetland-Dependent Birds: Are Waterfowl Effective Surrogates for Other Species? Sites and Basin Shapefiles for GLRI Toxic Contaminant Loading Project Southeast Regional Assessment Project (SERAP): Assessing Global Change Impacts on Natural and Human Systems in the Southeast SERAP:  Assessment of Climate and Land Use Change Impacts on Terrestrial Species Probabilistic estimates of the distribution of near-surface permafrost in Alaska Geochemical and Geophysical Characteristics of the Conterminous United States U.S. Geological Survey - Gap Analysis Project Species Habitat Maps CONUS_2001 Current National Data Resources for the Gap Analysis Project SERAP:  Comprehensive Web-based Climate Change Projections: Downscaled Maps and Data NFHP Data Catalog GAP Species Viewer