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Map of the risk of current fish habitat degradation of inland streams of the Southern Plains States.
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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): Impervious surface cover Total anthropogenic sediment yield Upstream dam density Industrial water withdrawal High intensity urban land use Top three most pervasive disturbances to creeks (watersheds <100 km 2 in area) across all spatial scales: Total anthropogenic (human caused) sediment yield Impervious surface cover Industrial water withdrawal Top three most pervasive disturbances to rivers (watersheds >100 km 2 in area) across all spatial scales : Road...
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The Desert Pupfish (Cyprinodon macularius) is a Federally listed endangered species found in shallow waters of rare desert springs, small streams, and marshes. The typical habitat includes clear water with aquatic plants or algae. These are difficult habitats for fish as they have high salinity water, high water temperatures, and low oxygen concentrations. Decline of the Desert Pupfish has been associated with dam construction, water diversions, groundwater pumping, pesticide drift, and encroachment of non-native vegetation such as Tamarix, also known as Salt Cedar. Salt Cedar can alter riparian habitats and the subsequent shading and roots can alter aquatic habitats.
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Major population centers exist on most of the islands, particularly on O’ahu which has a densely populated urban core. Urban sprawl increased by 76,000 acres from 1982 to 2012, which equals about two percent of Hawaii’s land mass. Urbanization results in physical loss of aquatic habitat as well as polluted runoff and altered hydrology. The Hawaiian Department of Health in 2015 listed sediment, nutrients, and bacteria as the most common threats to aquatic ecosystems and human health and that the vast majority of impaired sites are marine areas. Development contributes excessive sedimentation through improperly constructed roads and drainage systems, poor construction practices, and to nutrient loading through landscape...
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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): Impervious surface Road crossing density Road length density Downstream dam density Crop land use Top five most pervasive disturbances, specific to spatial scale: Road crossing density in network catchments Road length density in network catchments Impervious surface cover in network catchments Downstream dam density in network catchments Impervious surface cover in network buffers In the Mountain state group, 76.6% of streams are classified as low or very low...
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Wheat and corn are the two most commonly grown crops in Kansas and Oklahoma and zones with a high risk of habitat degradation in eastern Kansas and Oklahoma correspond to areas of these and other row crops. Texas grew 6.2 million acres of cotton in 2014-15 predominately in the panhandle region, which was projected to be at high risk of fish habitat deterioration. Nutrient runoff from crop fields from all southern plains states not only affects local streams but eventually ends up in estuaries and the Gulf of Mexico. This high-nutrient runoff contributes to a low oxygen dead zone which annually averages over 5,000 square miles in size in the northern Gulf of Mexico and causes fish kills.
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Assessment Results for Rivers and Streams of the Southwestern States 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): Road crossing density Road length density Impervious surface Downstream dam density Population density Top three most pervasive disturbances to creeks (watersheds <100 km 2 in area) across all spatial scales: Road crossing density Road length density Impervious surface Top three most pervasive disturbances to rivers (watersheds >100 km 2 in area) across all spatial scales : Road crossing...
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Map of the risk of current fish habitat degradation of inland streams of Alaska (HUC-12).
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The northeast is one of the most urbanized areas in the country, with a high percentage of impervious surfaces in some of its watersheds. These impervious surfaces alter the water flow (hydrology) of streams and increase sedimentation, nutrient loading, and pollution in rivers, lakes, and bays. Urbanization also results in the direct loss of fish habitat as wetlands are filled, streams diverted, and channels dredged. The effects of urbanization are apparent in the greater New York City area, Boston, Westchester-Springfield, Providence, and Buffalo-Rochester. However, increasing suburban sprawl also has a significant negative affect on aquatic habitats. From 1982 to 2012, developed land increased by almost three...
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Map of the risk of current fish habitat degradation of inland streams of the Northeastern States region.
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The Alabama Sturgeon (Scaphirhynchus suttkusi) has suffered from habitat loss and fragmentation caused by dredging for navigation, peaking hydropower projects, and dam construction. This species requires clean hard substrate with stable daily flows for spawning, and needs connected river reaches for long-distance spawning migrations. Both of these needs have been disrupted by human activities in their range. This fish has disappeared from about 85 percent of its historic range in the Alabama and Tombigbee River systems. The Alabama Sturgeon was placed on the endangered species list in 2000.
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Partnership – Great Lakes Basin Fish Habitat Partnership The nearly 300 square mile Boardman River watershed is located in Grand Traverse and Kalkaska Counties in northwest Michigan. With the exception of the extreme lower river and three impoundments, the Boardman River is an oligotrophic river system with excellent water quality characterized by cold temperatures, high dissolved oxygen concentrations, and nutrients provided by distant inputs. Of the approximately 179 miles of river and tributary streams in the Boardman system, 36 miles are designated as a “Blue Ribbon” trout stream, providing premier fish habitat. Anglers from near and far come to enjoy the predominantly resident Brook and Brown Trout fishery,...
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Partnership - Southeast Aquatic Resources Partnership Dams and man-made barriers pose to impeding the movement of fish and blocking fish from their spawning grounds and habitat connectivity is listed as a top priority of the Southeast Aquatic Habitat Plan, the strategic plan of the Southeast Aquatic Resources Partnership (SARP). To help address this issue, SARP, together with the Nature Conservancy (TNC) has completed a large scale assessment of dams in the Southeastern United States. The Southeast Aquatic Connectivity Assessment Project ( SEACAP), funded by the South Atlantic Landscape Conservation Cooperative (SALCC), supports planners and managers in their efforts to target fish passage and other aquatic...
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The Redside Dace (Clinostomus elongatus) prefers small to medium, cool, clear, rubble- and gravel-bottomed streams. This type of habitat in streams is disappearing in parts of the region because of excessive sedimentation, altered water flows, and nutrient inputs from farming, mining, and urban development.
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The Pinewoods Darter (Etheostoma mariae) is native to the Little Peedee River system in the Carolina Sandhills area where it is found in smaller, swift-flowing creeks with gravel bottoms and vegetation. This area is becoming increasingly altered by residential development, agriculture, lumbering, and damming of headwater streams, typically for golf course development. Additionally, the reintroduction and rapid expansion of beavers in this drainage is converting some of the critical flowing streams to small impoundments.
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The Northern Madtom (Noturus stigmosus) is a small member of the catfish family that requires fast currents and complex rocky habitat. It faces a host of habitat threats including competition with invasive species, climate change, siltation, loss of habitat, excessive turbidity, and poor water quality. Channelization of small streams in this region is a significant threat to this species.
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The Pallid Sturgeon (Scaphirhynchus albus) once ranged throughout the Missouri and Mississippi Rivers and requires moderate to swift rivers with both sand and rock substrates. This long-lived species, often living more than 50 years and growing to 90 pounds, requires un-fragmented river reaches to complete its life history. River channelization, bank stabilization, impoundments, and altered flow regimes have all negatively affected this species, which is listed under the Federal Endangered Species Act. The presence of multiple large dams on the Missouri River has truncated the distance the larvae can be free-floating and may cause them to settle out in the reservoirs and perish. Adult Pallid Sturgeon are not able...
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There are nine large dams on the 652-mile (1,049-kilometer) Tennessee River. There are another 23 large dams on the tributaries to the Tennessee River. Protected areas in the region ensure the recovery of endangered and threatened species of animals and plants, including the Longnose Darter, Ozark Cavefish, and Ozark Cave Crayfish. Six large reservoirs were created by dams in the White River Basin, Arkansas, from 1911 through 1960 and required the displacement of a large number of people. Nearly 400 people in Baxter County, Arkansas, were displaced to make way for the reservoir created by the Norfork Dam. The town of Forsyth, Missouri, was relocated in its entirety to a spot 2 miles (3.2 kilometers) from its previous...
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The largest of the eight main Hawaii Islands— Hawai’i, Maui, Molokai, O’ahu, and Kaua’i—have well-defined watersheds and perennial streams. There are 376 perennial streams on these islands, most of which start high in the mountains and high numerous waterfalls before they reach the ocean. Forty large stream systems form small stream-mouth estuaries at their confluence with the ocean. These estuaries are critical transition points for migratory fish species and represent the connecting point between inland and coastal systems. They are also important nursery habitat for many coastal marine reef fish during key life stages. Furthermore, Hawaii’s aquatic resources are considered to be absolutely...
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Map of the risk of current fish habitat degradation of inland streams of the Eastern Gulf of Mexico States.
map background search result map search result map Eastern Gulf of Mexico States - Risk of Current Fish Habitat Degradation Map Facts About Central Mississippi River States Fish Habitat Partnerships Making A Difference with Regional Assessments and Decision Support Tools to Guide Fish Passage in the Southeastern United States Most Pervasive and Severe Disturbances for the Mountain States Habitat Trouble for Redside Dace in Upper Midwest States Description of Agriculture as a Human Activity Affecting Fish Habitat in Southern Plains States Summary of Scientific Findings for Hawaii Habitat Trouble for Pallid Sturgeon in Northern Plains States Habitat Trouble for Pinewoods Darter in Southeast Atlantic States Alaska - Risk of Current Alteration Map (HUC-12) Southern Plains States - Risk of Current FIsh Habitat Degradation Map Most Pervasive and Severe Disturbances for the Southwestern States Description of Urban Land Use as a Human Activity Affecting Fish Habitat in Northeastern States Habitat Trouble for Alabama Sturgeon in Eastern Gulf of Mexico States Habitat Trouble for Northern Madtom in Central Midwest States Description of Urban Land Use as a Human Activity Affecting Fish Habitat in Hawaii Fish Habitat Partnerships Making a Difference in Boardman River, Michigan Habitat Trouble for Desert Pupfish in Southwestern States Most Pervasive and Severe Disturbances for the Pacific Coast States Northeastern States- Risk of Current Fish Habitat Degradation Map Fish Habitat Partnerships Making A Difference with Regional Assessments and Decision Support Tools to Guide Fish Passage in the Southeastern United States Habitat Trouble for Pinewoods Darter in Southeast Atlantic States Habitat Trouble for Pallid Sturgeon in Northern Plains States Description of Urban Land Use as a Human Activity Affecting Fish Habitat in Northeastern States Northeastern States- Risk of Current Fish Habitat Degradation Map Habitat Trouble for Northern Madtom in Central Midwest States Facts About Central Mississippi River States Habitat Trouble for Redside Dace in Upper Midwest States Fish Habitat Partnerships Making a Difference in Boardman River, Michigan Eastern Gulf of Mexico States - Risk of Current Fish Habitat Degradation Map Habitat Trouble for Alabama Sturgeon in Eastern Gulf of Mexico States Most Pervasive and Severe Disturbances for the Pacific Coast States Most Pervasive and Severe Disturbances for the Southwestern States Habitat Trouble for Desert Pupfish in Southwestern States Most Pervasive and Severe Disturbances for the Mountain States Description of Agriculture as a Human Activity Affecting Fish Habitat in Southern Plains States Southern Plains States - Risk of Current FIsh Habitat Degradation Map Summary of Scientific Findings for Hawaii Description of Urban Land Use as a Human Activity Affecting Fish Habitat in Hawaii Alaska - Risk of Current Alteration Map (HUC-12)