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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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Relative condition of fish habitat in streams of the Eastern Gulf of Mexico States. Histogram shows percentage of total stream length in each condition class.
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Map of the risk of current fish habitat degradation of inland streams of the Mid-Atlantic States region.
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While this assessment has found that many of the inland streams were at a low or very low risk of degradation, some fish habitat disturbances, including water diversions, timber harvest practices, and intensity of livestock grazing in watersheds, could not be directly included in this assessment because national datasets of these disturbances and their component 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. These gaps need to be kept in mind while examining the results....
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Map of the risk of current fish habitat degradation of inland streams of the Pacific Coast States.
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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...
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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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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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Map of the risk of current fish habitat degradation of inland streams of the Northeastern States region.
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Map of the risk of current fish habitat degradation of inland streams of the Eastern Gulf of Mexico States.
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The landscape of the Eastern Gulf of Mexico States ranges from the plateaus and highlands of northern Alabama to the coastal marshes along the Gulf, with the dominant inland forest type being pine and oak forests. This variety of habitats allows for a high diversity of fish species as evidenced by Alabama alone being home to more than 450 fish species. Over 64 percent of the inland fish habitat of Eastern Gulf Coast states is estimated to be at low or very low risk of degradation. While only 19 percent of the stream area in this region was estimated to be at high or very high risk, factors that threaten aquatic resources in the region are diverse and significant areas have been substantially altered as a result...
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In general, the northern portion of this region, such as Maine, upper Vermont and New Hampshire, and the Adirondack and Catskill Mountains in New York, are at lower risk of current degradation than the southern areas, where population pressures are more intense. Overall, 53 percent of the stream miles in the Northeastern States have a low or very low risk of habitat degradation. However, the Northeastern States have experienced extensive alteration and loss of aquatic habitats in many areas. As a result, 32 percent of the stream miles have high or very high risk of aquatic habitat degradation and the region is one of the most threatened in the conterminous United States. The most common disturbances in the region...
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The majority of streams, particularly in the headwater reaches, in the Mid-Atlantic States have a low risk of current habitat degradation using the factors assessed, with most of these streams located in heavily-wooded West Virginia, Delmarva Peninsula, southern New Jersey, rural portions of central and eastern Virginia, and central Pennsylvania. Overall, 55 percent of the rivers and streams in the mid-Atlantic fall into the low and very low categories of risk of habitat degradation from the factors assessed. However, an examination of water flow patterns (hydrology) was not included, thus some of the areas scored as low risk may in fact be at higher risk. The most common disturbances in this region are associated...
    map background search result map search result map Eastern Gulf of Mexico States - Risk of Current Fish Habitat Degradation Map Mid-Atlantic States - Risk of Current Fish Habitat Degradation Map Description of Agriculture as a Human Activity Affecting Fish Habitat in Southern Plains States Summary of scientific findings for Pacific Coast States Pacific Coast States - Risk of Current Fish Habitat Degradation Map Southern Plains States - Risk of Current FIsh Habitat Degradation Map Summary of Scientific Findings for Mid-Atlantic States Summary of Scientific Findings for Southeast Atlantic States Summary of Scientific Findings for Eastern Gulf of Mexico States Eastern Gulf of Mexico States Risk of Current Degradation Chart (Stream Length) Southeast Atlantic States - Risk of Current Fish Habitat Degradation Map Summary of Scientific Findings for Northeastern States from the 2015 National Fish Habitat Assessment Northeastern States- Risk of Current Fish Habitat Degradation Map Summary of Scientific Findings for Southern Plains States Mid-Atlantic States - Risk of Current Fish Habitat Degradation Map Summary of Scientific Findings for Mid-Atlantic States Summary of Scientific Findings for Southeast Atlantic States Southeast Atlantic States - Risk of Current Fish Habitat Degradation Map Summary of Scientific Findings for Northeastern States from the 2015 National Fish Habitat Assessment Northeastern States- Risk of Current Fish Habitat Degradation Map Eastern Gulf of Mexico States - Risk of Current Fish Habitat Degradation Map Summary of Scientific Findings for Eastern Gulf of Mexico States Eastern Gulf of Mexico States Risk of Current Degradation Chart (Stream Length) Summary of scientific findings for Pacific Coast States Pacific Coast States - Risk of Current Fish Habitat Degradation Map 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 Southern Plains States