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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...
Abstract The distribution and future fate of ectothermic organisms in a warming world will be dictated by thermalscapes across landscapes. That is particularly true for stream fishes and cold-water species like trout, salmon, and char that are already constrained to high elevations and latitudes. The extreme climates in those environments also preclude invasions by most non-native species, so identifying especially cold habitats capable of absorbing future climate change while still supporting native populations would highlight important refugia. By coupling crowd-sourced biological datasets with high-resolution stream temperature scenarios, we delineate network refugia across >250 000 stream km in the Northern...
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Stream reaches and local and network catchments and buffers (modified from Wang et al. 2011).
Tags: Figure, 2015
Lands within the watersheds of the Great Plains streams that are not used for crops are often used for cattle grazing and hay production. Northern Plains States are one of the nation’s top producers of cattle, which outnumber people almost three to one in North Dakota. Cattle can have direct habitat impacts by trampling stream banks, which destroys beneficial vegetation and increases sedimentation and nutrient loads. Hofmann and Ries (1991) found that livestock increased sediment runoff in North Dakota streams. Schepers and Francis (1982) reported that runoff from a Nebraska cattle farm increased total phosphorus levels in runoff by 37%. In addition, cattle watering ponds, often constructed by diverting streams,...
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Relative condition of fish habitat in streams of the Northern Plains States. Histogram shows percentage of total stream length in each condition class.
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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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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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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.
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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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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A. Pervasive disturbances: The most common disturbances based on total stream length in a given region. Top five overall most pervasive disturbances to all stream reaches, regardless of stream size and across all spatial scales (ranked highest first): Total excessive (anthropogenic or man caused) sediment yield Impervious surface cover Road crossing density Population density Pasture and hay land use Top three most pervasive disturbances to creeks (<100 km 2 watersheds) across all spatial scales : Total excessive sediment yield Impervious (hard) surface cover Road crossing density Top three most pervasive disturbances to rivers (>100 km 2 watersheds) across all spatial scales: Upstream dam density...
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This landing page contains peak-flow frequency analyses by the U.S. Geological Survey Wyoming - Montana Water Science Center. Sets of analyses are published as data releases which are child items to this landing page.


map background search result map search result map Cross section of basaltic next exposed by erosion in Grant Ridges, 6 miles northeast of Grant, view looking southwest. Valencia County, New Mexico. 1931. 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) Northern Plains States - Risk of Current Degradation Chart (Stream Length) Generalized Methodology for Stream Assessments of Alaska and Hawaii Most Pervasive and Severe Disturbances for the Eastern Gulf of Mexico States Summary of Scientific Findings for Southeast Atlantic States Habitat Trouble for American Eel in Northeastern States Description of Pasture as a Human Activity Affecting Fish Habitat in Northern Plains States Fish Habitat Partnership Activities for the Southeast Atlantic States Habitat Trouble for Waccamaw Silverside in Southeast Atlantic States Peak-Flow Frequency Analyses by the U.S. Geological Survey Wyoming - Montana Water Science Center Cross section of basaltic next exposed by erosion in Grant Ridges, 6 miles northeast of Grant, view looking southwest. Valencia County, New Mexico. 1931. 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 Northern Plains States - Risk of Current Degradation Chart (Stream Length) Description of Pasture as a Human Activity Affecting Fish Habitat in Northern Plains States Habitat Trouble for American Eel in Northeastern States Peak-Flow Frequency Analyses by the U.S. Geological Survey Wyoming - Montana Water Science Center Habitat Trouble for Ironcolor Shiner in Upper Midwest States Most Pervasive and Severe Disturbances for the Eastern Gulf of Mexico 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 Fish Habitat Partnerships Making a Difference in Kiholo Estuary-Fishpond Complex, Hawaii Generalized Methodology for Stream Assessments of Alaska and Hawaii