Unified Interior Regions

Region 1: North Atlantic-Appalachian

Our Science Centers

Our Science Centers

The NAA Region has 15 Science Centers spanning 14 NE States and Washington, DC. The Centers conduct interdisciplinary biologic, geologic, hydrologic, and energy monitoring and research addressing natural resource issues facing our nation.

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August and September Photo Contests

August and September Photo Contests

Check out the winning photographs in the August and September 2021 Photo Contests! Categories include People, USGS at Work, Where We Work, and Honorable Mention.

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Regions L2 Landing Page Tabs

Filter Total Items: 16,165
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Year Published: 2016

Advanced hierarchical distance sampling

In this chapter, we cover a number of important extensions of the basic hierarchical distance-sampling (HDS) framework from Chapter 8. First, we discuss the inclusion of “individual covariates,” such as group size, in the HDS model. This is important in many surveys where animals form natural groups that are the primary observation...

Royle, Andy
Kéry, M. and Royle, J.A., 2016, Chapter 9 – Advanced Hierarchical Distance Sampling, in Kéry, M. and Royle, J.A., editors, Applied Hierarchical Modeling in Ecology: Analysis of distribution, abundance and species richness in R and BUGS: Volume 1: Prelude and Static Models: Amsterdam and Boston, Elsevier, p. 463–550.

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Year Published: 2016

Awell-preserved conodont fauna from the Pennsylvanian Excello Shale of Iowa, U. S. A.

A superbly preserved discrete element conodont fauna has been recovered from carbonate concretions from the upper Desmoinesian (Pennsylvanian) Excello Shale at two localities in south-central Iowa. The multielement apparatuses for Gondolella wardlawi (new species), Idiognathodus acutus, Idioprioniodus conjunctus, and Neognathodus roundyi are...

Merlynd K. Nestell; Wardlaw, Bruce R.; John P. Pope

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Year Published: 2016

Comparative mitogenomic analyses of three North American stygobiont amphipods of the genus Stygobromus (Crustacea: Amphipoda)

The mitochondrial genomes of three North American stygobiont amphipods Stygobromus tenuis potomacus, S. foliatus and S. indentatus collected from Caroline County, VA, were sequenced using a shotgun sequencing approach on an Illumina NextSeq500 (Illumina Inc., San Diego, CA). All three mitogenomes displayed 13 protein-...

Aunins, Aaron; Nelms, David L.; Hobson, Christopher S.; King, Tim L.

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Year Published: 2016

Early Mesozoic geology in Virginia

No abstract available.

Bailey, Christopher M.; Sherwood, W. Cullen; Eaton, L. Scott; Powars, David S.; Smoot, Joseph P.
Joseph P. Smoot Early Mesozoic Geology in Virginia

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Year Published: 2016

Estimating abundance

This chapter provides a non-technical overview of ‘closed population capture–recapture’ models, a class of well-established models that are widely applied in ecology, such as removal sampling, covariate models, and distance sampling. These methods are regularly adopted for studies of reptiles, in order to estimate abundance from counts of marked...

Sutherland, Chris; Royle, Andy
Sutherland, C. and Royle, J.A., 2016, Estimating abundance, in Dodd, C.K., editor, Reptile Ecology and Conservation: A Handbook of Techniques: New York, NY, Oxford University Press, p. 388-401.

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Year Published: 2016

Estimating abundance: Chapter 27

This chapter provides a non-technical overview of ‘closed population capture–recapture’ models, a class of well-established models that are widely applied in ecology, such as removal sampling, covariate models, and distance sampling. These methods are regularly adopted for studies of reptiles, in order to estimate abundance from counts of marked...

Royle, J. Andrew
Sutherland, C. and Royle, J.A., 2016, Chapter 27 - Estimating abundance, in Dodd, C.K., editor, Reptile Ecology and Conservation: A Handbook of Techniques: New York, NY, Oxford University Press, p. 388-401.

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Year Published: 2016

Forest structure of oak plantations after silvicultural treatment to enhance habitat for wildlife

During the past 30 years, thousands of hectares of oak-dominated bottomland hardwood plantations have been planted on agricultural fields in the Mississippi Alluvial Valley. Many of these plantations now have closed canopies and sparse understories. Silvicultural treatments could create a more heterogeneous forest structure, with canopy gaps and...

Schweitzer, Callie Jo; Clatterbuck, Wayne K.; Oswalt, Christopher M.; Twedt, Daniel J.; Phillip, Cherrie-Lee P.; Guilfoyle, Michael P.; Wilson, R. Randy
Twedt, D. J., C.-L. P. Phillip, M. P. Guilfoyle, and R. R. Wilson. 2016. Forest structure of oak plantations after silvicultural treatment to enhance habitat for wildlife. Pages 113-121 in Callie Jo Schweitzer, Wayne K. Clatterbuck, and Christopher M. Oswalt, editors. Proceedings of the 18th Biennial Southern Silvicultural Research Conference. USDA Forest Service, Southern Research Station x, 627 pp.

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Year Published: 2016

Geologic context of large karst springs and caves in the Ozark National Scenic Riverways, Missouri

The ONSR is a karst park, containing many springs and caves. The “jewels” of the park are large springs, several of first magnitude, that contribute significantly to the flow and water quality of the Current River and its tributaries. Completion of 1:24,000-scale geologic mapping of the park and surrounding river basin, along with synthesis of...

Weary, David J.; Orndorff, Randall C.

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Year Published: 2016

Geology and geomorphology of the Carolina Sandhills, Chesterfield County, South Carolina

This two-day field trip focuses on the geology and geomorphology of the Carolina Sandhills in Chesterfield County, South Carolina. This area is located in the updip portion of the U.S. Atlantic Coastal Plain province, supports an ecosystem of longleaf pine (Pinus palustris) and wiregrass (Aristida stricta), and contains three major geologic map...

Swezey, Christopher S.; Fitzwater, Bradley A.; Whittecar, G. Richard
Swezey, C.S., Fitzwater, B.A., and Whittecar, G.R., 2016, Geology and geomorphology of the Carolina Sandhills, Chesterfield County, South Carolina, in: Gold, Structures, and Landforms in Central South Carolina – Field Guides for the GSA Southeastern Section Meeting, Columbia, South Carolina, 2016 (W.R. Doar III, ed.): Geological Society of America Field Guide 42, p. 9-36.

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Year Published: 2016

Geology of the Mount Rogers area, revisited: Evidence of Neoproterozoic continental rifting, glaciation, and the opening and closing of the Iapetus ocean, Blue Ridge, VA–NC–TN

Recent field and geochronological studies in eight 7.5-minute quadrangles near Mount Rogers in Virginia, North Carolina and Tennessee recognize important stratigraphic and structural relationships for the Neoproterozoic Mount Rogers and Konnarock formations, the northeast end of the Mountain City window, the separation of Mesoproterozoic rocks of...

Merschat, Arthur J.; Merschat, Arthur J.; Southworth, C. Scott; Holm-Denoma, Christopher S.; McAleer, Ryan J.
2. Merschat, A.J., Southworth, S., Holm-Denoma, C.S., McAleer, R.J., 2016, Geology of the Mount Rogers area, revisited: Evidence of Neoproterozoic continental rifting, glaciation, and the opening and closing of the Iapetus ocean, Blue Ridge, VA–NC–TN, in Merschat, A.J., ed., Geology of the Mount Rogers area, revisited, Blue Ridge, VA–NC–TN: Carolina Geological Society Annual Field Trip Guidebook, p. 3–28.

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Year Published: 2016

Hematology results from experimental exposure of sandhill cranes to West Nile virus

West Nile virus is a deadly virus for young cranes. In testing two different vaccines on both adult sandhill cranes (Grus canadensis), we discovered that some blood parameters are altered by exposure to the virus. White blood cell counts were the most obvious, and may be used as an indicator of West Nile virus exposure in cranes. Other hematology...

Olsen, Glenn H.

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Year Published: 2016

In-air hearing of a diving duck: A comparison of psychoacoustic and auditory brainstem response thresholds

Auditory sensitivity was measured in a species of diving duck that is not often kept in captivity, the lesser scaup. Behavioral (psychoacoustics) and electrophysiological [the auditory brainstem response (ABR)] methods were used to measure in-air auditory sensitivity, and the resulting audiograms were compared. Both approaches yielded audiograms...

Crowell, Sara E.; Wells-Berlin, Alicia M.; Therrien, Ronald E.; Yannuzzi, Sally E.; Carr, Catherine E.
Crowell, S. E., Wells-Berlin, A. M., Therrien, R. E., Yannuzzi, S. E., and Carr, C. E., 2016, In-air hearing of a diving duck: A comparison of psychoacoustic and auditory brainstem response thresholds : Journal of the Acoustical Society of America, v. 139, no. 5, p. 3001.

Filter Total Items: 1,772

Head of the Meadow Beach video camera 2 bright image

Two video cameras are mounted on a bluff near Head of the Meadow Beach, Cape Cod National Seashore, North Truro, MA. One camera looks directly offshore (north east), and the second looks alongshore (north-northeast). A “bright” image shows the brightest pixel values throughout the video, useful for identifying the position of maximum wave run-up on the beach, position of

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Photograph of Head of the Meadow Beach shoreline

Head of the Meadow Beach video camera 1 dark image

Two video cameras are mounted on a bluff near Head of the Meadow Beach, Cape Cod National Seashore, North Truro, MA. One camera looks directly offshore (north east), and the second looks alongshore (north-northeast). A “dark” image shows the darkest pixel values throughout the video, useful for tracking sediment plumes, tracking floating debris, and filtering out breaking

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Head of the Meadow Beach video camera 2 dark image

Two video cameras are mounted on a bluff near Head of the Meadow Beach, Cape Cod National Seashore, North Truro, MA. One camera looks directly offshore (north east), and the second looks alongshore (north-northeast). A “dark” image shows the darkest pixel values throughout the video, useful for tracking sediment plumes, tracking floating debris, and filtering out breaking

...
An image of Lick Run, Roanoke, Virginia, with background watershed map.

Live WebCam Video of Lick Run at Washington Park, Roanoke, Virginia

A webcam is installed at Lick Run in Washington Park, Roanoke, Virginia allowing you to view river-stage conditions in real time. The camera is operated in cooperation with the City of Roanoke.

Photograph of Head of the Meadow Beach shoreline

Head of the Meadow Beach video camera 1 variance image

Two video cameras are mounted on a bluff near Head of the Meadow Beach, Cape Cod National Seashore, North Truro, MA. One camera looks directly offshore (north east), and the second looks alongshore (north-northeast). A “variance” image shows the standard deviation of pixel intensity throughout the video, and it is useful for determining how much variation or movement is

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view of snow covered Lake Champlain from Port Henry, NY

Lake Champlain at Port Henry, NY

PLEASE NOTE: During winter months, ice and snow can affect the picture quality. The camera is cleaned as often as it is safe to do so.

Lake Champlain at Port Henry, NY (04294413)