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The Ironcolor Shiner (Notropis chalybaeus) is found in deep pool areas of creeks and small rivers and is often associated with aquatic vegetation. This species needs clear sandy areas for spawning. Populations of Ironcolor Shiner are in decline due to increased turbidity, siltation, and pollution.
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The Waccamaw Silverside (Menidia extensa) has a very limited distribution confined to Lake Waccamaw in North Carolina, a lake with neutral pH levels from underlying limestone formations in an area of acidic natural waters. This species is found in large schools and often over dark-colored substrates. Its limited habitat is threatened by nutrient loading caused by the runoff of organic matter and agricultural chemicals.
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Relative condition of fish habitat in streams of the Pacific Coast States. Histogram shows percentage of total stream length in each condition class.
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Partnership - Hawaii Fish Habitat Partnership Anchialine pools represent an inland waterbody type that is widespread but threatened throughout the Hawaiian Islands and is a key habitat type of concern to the Hawaii Fish Habitat Partnership. Anchialine pools, also known as fishponds in Hawaii, are near the coast and are land-locked bodies of water that have connections both to the sea, typically by high tides, as well as to local freshwater. These systems have been used for thousands of years for fish production by Native Hawaiians. The majority of remaining fishpond pools are located on the Kona coast and southern coastlines of the Big Island, the southeast coast of Maui, and on several small and widely separated...
This item provides the ScienceBase query that identifies components of the fish habitat assessments within the Central Midwest States. It also contains a link to a configuration file that pulls these pieces of information into a logical order. This information can be accessed through the ScienceBase API to display a summary of fish habitat assessment information for the Central Mississippi River States.
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State-wide data on fish populations were limited in Alaska for use in this assessment, as was a detailed spatial (mapping) framework that fully characterizes watersheds throughout the state at the time this assessment was conducted. Because of these factors, we modified our assessment methods to account for these limitations. Twenty-one landscape disturbance variables were assembled from medium-sized watersheds throughout the state (i.e., 12-digit hydrologic unit code watersheds). Variables were then assigned to one of six categories based on their disturbances to stream habitats. Categories include: urban land use, agricultural land use, point source pollution and water quality, barriers to fish movement, human...
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The habitats of the Southeast Atlantic states range from the mountains and uplands in the Blue Ridge and Piedmont areas in the western portion of this region to the Southeastern and Coastal Plains. Fish habitats in the higher elevation regions are typically fast-moving, clear, coldwater streams originating from seeps and springs, while warmwater rivers of the plains carry more organic material and sediment. This diversity of habitats along a very long period of stable geologic activity produces one of the most diverse assemblages of aquatic species in the nation. The Altamaha, Chattahoochee, Flint, Savannah, Catawba, Pee Dee, Broad, and Neuse are major rivers of the region. There are a large number of dams on waterways...
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Partnerships - Atlantic Coastal Fish Habitat Partnership, Eastern Brook Trout Joint Venture, Reservoir Fisheries Habitat Partnership, and Southeast Aquatic Resources Partnership Removed four barriers that opened access to six mile of streams and restored 21 miles of streams to improve habitat for Eastern Brook Trout and other fish species. A shoreline restoration demonstration area was constructed near the U.S. Army Corps of Engineers Visitors Center in North Carolina. Native vegetation was used to stabilize 175’ of shoreline to be used as a showcase for other lakeshore property owners. Planted 0.2 acres of tidal marsh and installed 0.1 acres of oyster reefs in Stump Sound, North Carolina. Also planted 0.15 acres...
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Available data for the American Eel (Anguilla rostrata) indicate that, overall, there have been declines in recruitment, population, and escapement during three generations (36 years). A recent report indicated that barriers to migration (dams and weirs), passage through turbines at hydropower dams, habitat degradation or loss, and overharvest were likely the greatest threats by humans across the species’ range. Although eels are able to ascend many smaller barriers, recent studies have documented a tenfold reduction in eel density above each potentially passable barrier. For example, the number of juvenile eels migrating to Lake Ontario passing over hydropower dams fell from 935,000 in 1985 to approximately 8,000...
This ScienceBase item provides the queries and code that identifies components and organization of the detailed methodology for the National Fish Habitat Partnership's regional estuary assessment for the Northern Gulf of Mexico.
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A Vision for the Chihuahuan Desert The Chihuahuan Desert, shared by two nations, is one of the most biologically rich desert ecoregions in the world, alive with large mammals, birds, reptiles and an unmatched diversity of cactus species. The desert’s rivers, streams and springs are considered to be of global significance, home to fish species found nowhere else on earth. Our vision is a Chihuahuan Desert where governments, local communities, non-governmental organizations, academic institutions, landowners, and other stakeholders are working together to ensure that the richness and diversity of wildlife, habitats, natural communities, and ecological processes of the Chihuahuan Desert are conserved and, where necessary,...
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Cross section of basaltic next exposed by erosion in Grant Ridges, 6 miles northeast of Grant, view looking southwest in sec. 3, T. 11 S., R. 9 W. Basalt in core is jointed in vertical columns and surrounded by a thin zone of platy jointing developed along the contact with white tuff. Bedded breccia overlies the tuff, and basaltic lava overlies the breccia on the far side of the cone. The tuff, chiefly rhyolitic, was erupted from Mount Taylor. Valencia County, New Mexico. 1931. Plate 11-A, U.S.Geological Survey Professional paper 189-B. 1938. Album: Hunt #62, Valencia County, New Mexcio, 1931. T. 11 S., R. 9 W, Sec. 3 View NW. at natural cross-section of a cinder cone 6 miles northeast of Grant. Columnar jointed...
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Album caption: Vasey's Paradise. Photo by E. C. Kolb. Handwritten notes in album caption: Coconino County, Arizona; Grand Canyon 35. Index card: Grand Canyon no. 35: Vaseys Paradise. Coconino County, Arizona, 1923. Photo by E. E. Kolb.
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Album caption: Loggerhead Key, dwelling of lighthouse keeper seen from end of whaf, southeast side of key. Handwritten notes on album caption: None Original index card: Vaughan, T. W. 834: Dwelling of lighthouse keeper, Monroe County, Florida. 1913.
Heavy rainfall occurred across Louisiana, Texas, Arkansas, and Mississippi in March 2016 as a result of a slow-moving southward dip in the jetstream, funneling tropical moisture into parts of the Gulf Coastal States and the Mississippi River Valley. The storm caused major flooding in the north and southeastern parts of Louisiana and in eastern Texas. Flooding also occurred in the Mississippi River Valley in Arkansas and Mississippi. Over 26 inches of rain were reported near Monroe, Louisiana over the duration of the storm event. In March 2016, U.S. Geological Survey (USGS) personnel made over 490 streamflow measurements at over 375 locations in Louisiana, Texas, Arkansas, and Mississippi. Many of those streamflow...
The Bering Cisco (Coregonus laurettae) is endemic to Alaska and is present primarily along the State’s west and north coasts. It is known to spawn in only three river systems – the Yukon, Kuskokwim, and Susitna Rivers. Genetic research indicates that each of these populations is distinct. The Bering Cisco has been observed to migrate more than 1,200 miles into freshwater streams to spawn. Unlike salmon, some of these fish survive spawning runs. Since this species is slow-growing but short-lived, it is highly vulnerable to alterations in stream flow or water quality and large-scale environmental disasters.
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In the mostly arid Southwestern United States, water availability (hydrology – a key fish habitat process), wildfires, and grazing intensity are important disturbances that are known to have major, negative effects on fish habitats. While this assessment indicated that many of the streams in this region are in good condition, a number of key habitat variables (i.e. water availability, wildlife frequency and intensity, and grazing intensity) could not be directly included in this assessment because national datasets of these disturbances and their measured variable are unavailable. Their absence from this assessment, along with absences of other disturbances, has likely produced an overestimation of habitat condition...
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In large river ecosystems, the timing, extent, duration and frequency of floodplain inundation greatly affect the quality of fish and wildlife habitat and the supply of important ecosystem goods and services. Seasonal high flows provide connectivity from the river to the floodplain, and seasonal inundation of the floodplain governs ecosystem structure and function. River regulation and other forms of hydrologic alteration have altered the connectivity of many rivers with their adjacent floodplain – impacting the function of wetlands on the floodplain and in turn, impacting the mainstem river function. Conservation and management of remaining floodplain resources can be improved through a better understanding of...
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Climate grids for the extent of the GNLCC study area saved as asciis with a 2km resolution. These grids are saved in in the Albers Equal Area Conic projection. Summer is defined as months 7-9, while winter is defined as months 1-3. All grids with the exception of cmi.asc, dd5.asc, & growingsl.asc were produced in the program ClimateWNA, which downscales PRISM climate grids using a digital elevation model. Mean annual precipitation (mm) - aprec.asc Annual Climate moisture index (cm/year) - cmi.asc Degree-days > 5°C - dd5.asc Growing season length - growingsl.asc Isothermality (°C) - isotherm.asc Mean annual temperature (°C) - mat.asc Maximum temperature warmest month (°C) - maxtw.asc Minimum temperature coldest...
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Most severe disturbances in the Northeastern States associated with stream reaches being scored as having high or very high risk of habitat degradation. Disturbances are grouped into super categories (fragmentation by dams; nutrient and sediment pollution; human population; road length and crossings; water withdrawals; urban land use; agricultural land use; mines and impervious surface cover) within the four spatial scales (local catchment, network catchment, local buffer, and network buffer). Only disturbance groups that have greater than 5% of stream length in a given category are represented in this figure. Note that not all disturbance categories are available for each spatial scale; buffers have only urban...


map background search result map search result map Vasey's Paradise, Grand Canyon National Park, 1923. Cross section of basaltic next exposed by erosion in Grant Ridges, 6 miles northeast of Grant, view looking southwest. Valencia County, New Mexico. 1931. Lighthouse keeper's dwelling, Loggerhead Key. Dry Tortugas National Park. 1913. Great northern landscape conservation cooperative climate grids GCPO Inundation Frequency Mosaic Ecoregion-Based Conservation in the Chihuahuan Desert Fish Habitat Partnerships Making a Difference in Kiholo Estuary-Fishpond Complex, Hawaii Summary of Scientific Findings for Southwestern States Habitat Trouble for Ironcolor Shiner in Upper Midwest States Pacific Coast States - Risk of Current Degradation Chart (Stream Length) Generalized Methodology for Stream Assessments of Alaska and Hawaii Northeastern States Most Pervasive and Severe Disturbances Figure Summary of Scientific Findings for Southeast Atlantic States Habitat Trouble for American Eel in Northeastern States Fish Habitat Partnership Activities for the Southeast Atlantic States Habitat Trouble for Waccamaw Silverside in Southeast Atlantic States Lighthouse keeper's dwelling, Loggerhead Key. Dry Tortugas National Park. 1913. Cross section of basaltic next exposed by erosion in Grant Ridges, 6 miles northeast of Grant, view looking southwest. Valencia County, New Mexico. 1931. Vasey's Paradise, Grand Canyon National Park, 1923. Summary of Scientific Findings for Southeast Atlantic States Fish Habitat Partnership Activities for the Southeast Atlantic States Habitat Trouble for Waccamaw Silverside in Southeast Atlantic States Northeastern States Most Pervasive and Severe Disturbances Figure Habitat Trouble for American Eel in Northeastern States Habitat Trouble for Ironcolor Shiner in Upper Midwest States Ecoregion-Based Conservation in the Chihuahuan Desert Pacific Coast States - Risk of Current Degradation Chart (Stream Length) Summary of Scientific Findings for Southwestern States GCPO Inundation Frequency Mosaic Fish Habitat Partnerships Making a Difference in Kiholo Estuary-Fishpond Complex, Hawaii Great northern landscape conservation cooperative climate grids Generalized Methodology for Stream Assessments of Alaska and Hawaii