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Arctic Grayling (Thymallus arcticus) now inhabits less than 5 percent of its historic river range in the Mountain States. This species requires high-quality coldwater habitat with long, un-fragmented reaches. Historically, glacial relict river populations were found in the Upper Missouri River Basin with another now extinct population in the Midwest (Michigan). The Arctic Grayling has been affected by water withdrawals, barriers to movement, and habitat degradation. One of the last strongholds, the Big Hole River in Montana, was reduced to a trickle in the summers of the 1990s as a result of irrigation withdrawals. Recent cooperative efforts, which include better water management, have improved populations of Arctic...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
FishWithHabitatTrouble,
MountainRegion,
MountainStates
Map of the risk of current fish habitat degradation of inland streams of the Southwestern States.
A total of 15 large dams have been constructed along the 1,040-mile (1,674-kilometer) Snake River from its headwaters in the Rocky Mountains to its mouth on Lake Wallula, a reservoir formed behind McNary Dam on the Columbia River. Compared to the lower Snake River, the rest of the Columbia River watershed, and most of the Rocky Mountain West, the Upper Snake ecoregion has a high level of unique organisms (endemism), especially among freshwater mollusks, such as snails and clams. There are at least 21 snail and clam species of special concern, including 15 that appear to exist only in single clusters. There are 14 fish species found in the Upper Snake region that are not present elsewhere in the Columbia River watershed,...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
Facts,
MountainRegion,
MountainStates
Map of the risk of current fish habitat degradation of inland streams of the Upper Midwest States.
The Woundfin (Plagopterus argentissimus) once ranged from southwest Utah to southern Arizona in the Colorado and Gila River basins, but now only occur in 12 percent of its historical range, and is classified as critically endangered. It prefers quiet water adjacent to riffles of swift, warm, turbid small to medium rivers, but spawns in swifter flowing water over gravel. Populations have been affected by habitat loss, fragmentation, and degradation caused by dams and water diversions. Woundfin populations have also shown declines in areas where the non-native Red Shiner has proliferated due to changes in water flow patterns caused by dams and diversions. The Red Shiner is both a predator of and a competitor with...
Map of the risk of current fish habitat degradation of inland streams of the Pacific Coast States.
The Gulf Sturgeon (Acipenser oxyrinchus ssp. desotoi) as the name implies lives in the estuaries of the Gulf of Mexico but migrates up coastal rivers to spawn (anadromous). It is found in rivers from spring until fall and in the Gulf during the winter. It feeds heavily while in the Gulf, but adults eat very little (or not at all) while in the rivers. The species declined dramatically after the late 1800s. It fell victim to overharvest for its meat and roe, dam construction, and dredging activities. The largest population is currently in the Suwannee River in Florida.
Wheat, corn, and soybeans are some of the primary crops grown in the Northern Plains States. About 8.5 million acres, one-fourth of the state’s land area, are used to grow wheat in North Dakota. In areas of intense cultivation, streams are often channelized for irrigation, reducing their habitat value for fish as temperature, in-channel cover, and stream flow are significantly changed. In addition, watersheds dominated by row-crop agriculture discharge excess sediment and nutrients to downstream waters. Agricultural water withdrawal was also one of the most limiting disturbances identified in this assessment. A large number of groundwater wells in the Nemaha River basin in southeast Nebraska, an area dominated by...
While this assessment has found that much of the stream habitat in this region is at low or very low risk of degradation, some key fish habitat disturbances, including water withdrawals or diversions and intensity of livestock grazing in watersheds, could not be directly included in this assessment because national datasets of these disturbances and their supporting variables are unavailable. These disturbances are known to have major, negative effects on fish habitats in this region. Their absence from this assessment, along with absences of other disturbances, has likely produced an overestimation of habitat condition (quality) for some water bodies. Despite such absences, impairment to fish habitats was determined...
The Plains Minnow (Hybognathus placitus) is well adapted to prairie watersheds. It is found in open, shallow river channels of highly turbid rivers and creeks with sandy bottoms, high levels of dissolved solids, and slight to moderate erratic flows, typical of these watersheds. One of many issues affecting the Plains Minnow is that the construction of dams has significantly altered flow regimes in its range. Eliminating flood events has removed the historical cues for spawning and reduced spawning habitat.
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
FishWithHabitatTrouble,
MountainRegion,
MountainStates
Both Green (Acipenser medirostris) and White Sturgeon (Acipenser transmontanus) are long-lived species with delayed and intermittent spawning that require large amounts of connected habitat to complete their life cycle. Both species use inshore marine and estuarine habitat along with rivers for juvenile and adult habitat and require clean substrates in rivers to successfully spawn. Hydropower dams are barriers to movements of these species in Pacific rivers and have negatively affected spawning success by creating unstable daily water flow patterns through peaking power operations as has been documented in other sturgeon species. For example, the fragmentation of the Columbia River by dams has created 17 land-locked...
The Pahrump Poolfish (Empetrichthys latos) is an endangered endemic springfish and is the only remaining species in its genus, Empetrichthys. Originally occurring only in a large spring in southern Nevada, its entire historic habitat was lost in the 1960s due to excessive groundwater pumping, which desiccated the spring system. This species now exists in several refuge habitats in southern and central Nevada, as efforts to restore its original habitat have thus far been unsuccessful.
The Paddlefish (Polyodon spathula) has declined across its entire range due largely to loss of breeding habitat and overharvest, with much of it as illegal harvesting for caviar. Although conservation efforts have stabilized this species in the Central Mississippi States, a continued decline is expected due to overharvest, introduced species (particularly Asian Carp), and pollution. Other threats include channelization and dam construction that have blocked seasonal migration to suitable spawning sites which isolates individual populations and lead to breeding issues. Some characteristics of its life history, such as length of time to reach sexual maturity, make it susceptible to decline and slow to recover.
Partnerships - Southeast Aquatic Resources Partnership and Atlantic Coastal Fish Habitat Partnership Both the Southeast Aquatic Resources Partnership (SARP) and Atlantic Coastal Fish Habitat Partnership (ACFHP) supported marsh restoration/living shoreline projects on the Tolomato River in the Guana Tolomato Matanzas National Estuarine Research Reserve (GTMNERR) near St. Augustine, Florida. These projects are located on the southern portion of the Guana Peninsula and are creating a contiguous swath of restored marsh that is: improving and enhancing fish habitat; preventing shoreline erosion; and fostering opportunities for community stewardship and involvement that will provide benefits for years to come. The...
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): Impervious surface cover Population density Low intensity urban land use Road length density Downstream dam density Top three most pervasive disturbances to creeks (watersheds <100 km 2 in area) across all spatial scales: Impervious surface cover Low intensity urban land use Population density Top three most pervasive disturbances to rivers (watersheds >100 km 2 in area) across all spatial scales: Upstream dam density Pasture and hay land use Population...
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): Crop land use Population density Pasture and hay land use Road crossing density Low intensity land use Top three most pervasive disturbances to creeks (watersheds <100 km 2 in area) across all spatial scales: Crop land use Population density Low intensity urban land use Top three most pervasive disturbances to rivers (watersheds >100 km 2 in area) across all spatial scales : Pasture and hay land use Population density Crop land use Top five most pervasive...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
PervasiveSevere,
UpperMidwestRegion,
UpperMidwestStates
In the 1990s, urban land in Ohio, Illinois, and Indiana increased by about 10 percent. Currently, Ohio and Illinois are among the 10 most populous states in the nation, while Indiana is 16th. Over 31 million people live in these three states. Large cities such as Chicago, Indianapolis, Cincinnati, and Cleveland, as well as the suburban sprawl throughout the region, have created large areas of impervious surfaces and urban pollution near the rivers and lakes. These factors are known to degrade fish habitat by changing water flow (hydrology) and by adding excessive amounts of nutrients, pollutants and sediment into the waters in this region.
Partnerships - Atlantic Coastal Fish Habitat Partnership and Eastern Brook Trout Joint Venture The Upper Patten Stream Watershed near Surry, Maine historically supported a thriving commercial Alewife fishery and was used by many other anadromous fish species including Blueback Herring, American Eel, sea-run Brook Trout, and Atlantic Salmon. The Route 172 road crossing caused a four-foot drop without a jumping pool, creating a significant fish movement barrier. The road was the only barrier between Patten Bay and the upper drainage, located just upstream of the estuary. Patten Stream's Alewives were nearly eliminated, surviving mainly due to volunteers who carried fish over the barrier in nets so they may reach...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
CaseStories,
NortheasternRegion,
NortheasternStates
The Shortnose Sturgeon (Acipenser brevirostrum), the smallest of the three sturgeon species that occur in the eastern United States, requires clean rock or rubble above the head of tide for spawning. It has suffered from the construction of dams in the region. This species migrates upriver from lower reaches of river systems or from upper estuary areas to spawn, but has been blocked from reaching spawning areas by dams. Other spawning habitat has been impaired by water flow changes from water withdrawals and dam operations, particularly peaking power operations. Sturgeon species, in general, are very sensitive to changes from the natural water flow conditions.
Northern Plains States Fish Habitat Partnerships’ 2010 - 2015 Actions to Make a Difference Partnerships - Reservoir Fisheries Habitat Partnership, Great Lakes Basin Fish Habitat Partnership, Midwest Glacial Lakes Partnership, and Fishers and Farmers Partnership Provided funding for restoration of 2,825 feet of shoreline habitat, 932 feet of wetlands, and 2.5 acres of cove habitat in Custer County, Nebraska. Partners installed 25 rock piles, 26 tree reefs, and 26 shoals. Removed 58,810 cubic yards of bottom sediments from Arnold Lake, Nebraska. For more about specific waters and projects the Northern Plains States Fish Habitat Partnerships are working on, please see the following locations: New Life for Aging...
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