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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March Photo Contest

March Photo Contest

Check out the winning photographs in the March 2021 Photo Contest! Categories include People, USGS at Work, Where We Work, and Honorable Mention

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Regions L2 Landing Page Tabs

Filter Total Items: 15,969
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Year Published: 2015

Conodont biostratigraphy of the Permian-Triassic boundary sequence at Lung Cam, Vietnam

The occurrences of a few specimens of Clarkina and many specimens of Hindeodus at the Permian-Triassic boundary section at Lung Cam, Vietnam allow accurate graphic correlation to the P-T boundary stratotype at Meishan, China. One species of Clarkina, ten species and two subspecies of Hindeodus, and the apparatuses of Hindeodus latidentatus and...

Wardlaw, Bruce R.; Nestell, Merlynd K.; Nestell, Galina P.; Ellwood, Brooks B.; Lan, Luu Thi Phuong

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Year Published: 2015

Conodont faunas from a complete basinal succession of the upper part of the Wordian (Middle Permian, Guadalupian, West Texas)

In the southern part of the Patterson Hills just to the west of the Guadalupe Mountains escarpment ofWest Texas, a 29m outcrop of alternating calcareous siltstone and silty limestone with a few thin fine sandstone interbeds displays the overlap occurrence of a narrowmorphotype of Jinogondolella nankingensis (herein named J. nankingensis behnkeni)...

Wardlaw, Bruce R.; Nestell, Merlynd K.

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Year Published: 2015

Developing a conservation strategy to maximize persistence of an endangered freshwater mussel species while considering management effectiveness and cost

We used a structured decision-making process to develop conservation strategies to increase persistence of Dwarf Wedgemussel (Alasmidonta heterodon) in North Carolina, USA, while accounting for uncertainty in management effectiveness and considering costs. Alternative conservation strategies were portfolios of management actions that differed by...

Smith, David R.; McRae, Sarah E.; Augspurger, Tom; Ratcliffe, Judith A.; Nichols, Robert B.; Eads, Chris B.; Savidge, Tim; Bogan, Arthur E.
19) Smith, D. R., S. E. McRae, T. Augspurger, J. A. Radcliffe, R. B. Nichols, C. B. Eads, T. Savidge, and A. E. Bogan. 2015. Developing a conservation strategy to maximize persistence of an endangered freshwater mussel species while considering management effectiveness and cost. Freshwater Science 34:1324-1339

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Year Published: 2015

Estimating the risks for adverse effects of total phosphorus in receiving streams with the Stochastic Empirical Loading and Dilution Model (SELDM)

Studies from North Carolina (NC) indicate that increasing concentrations of total phosphorus (TP) and other constituents are correlated to adverse effects on stream ecosystems as evidenced by differences in benthic macroinvertebrate populations in streams across the state. As a result, stringent in-stream criteria based on the Water Quality...

Granato, Gregory E.; Jones, Susan C.
Granato, G.E., and Jones, S.C., 2015, Estimating the risks for adverse effects of total phosphorus in receiving streams with the Stochastic Empirical Loading and Dilution Model (SELDM) in Proceedings of the 2015 International Conference on Ecology and Transportation (ICOET 2015), September 20-24, 2015, Raleigh, North Carolina: Raleigh, North Carolina, Center for Transportation and the Environment, 19 p.

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Year Published: 2015

Mineral Resource of the Month: Lime

Lime is the common term for several chemicals in three major categories: quicklime, hydrated lime and refractory dead-burned dolomite. Lime is almost never found naturally. It is primarily manufactured by burning limestone in kilns, followed by hydration when necessary. 

Corathers, Lisa A.

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Year Published: 2015

Quantifying the residence time and flushing characteristics of a shallow, back-barrier estuary: Application of hydrodynamic and particle tracking models

Estuarine residence time is a major driver of eutrophication and water quality. Barnegat Bay-Little Egg Harbor (BB-LEH), New Jersey, is a lagoonal back-barrier estuary that is subject to anthropogenic pressures including nutrient loading, eutrophication, and subsequent declines in water quality. A combination of hydrodynamic and particle tracking...

Defne, Zafer; Ganju, Neil K.
Defne, Z. and Ganju, N.K., 2015, Quantifying the residence time and flushing characteristics of a shallow, back-barrier estuary: application of hydrodynamic and particle tracking models. Estuaries and Coasts. DOI: 10.1007/s12237-014-9885-3.

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Year Published: 2015

Shoal basses: A clade of cryptic identity

Shoal basses are a cryptic clade composed of Micropterus spp. restricted to the Apalachicola River system and three southeastern Atlantic slope river drainages in the southeastern United States. This reciprocally monophyletic clade includes the Shoal Bass M. cataractae (endemic to the Apalachicola River system), the Chattahoochee Bass M....

Freeman, Byron J.; Taylor, Andrew T.; Oswald, Kenneth J.; Wares, John; Freeman, Mary; Quattro, Joseph M.; Leitner, Jean K.
Freeman, B. J., A. Taylor, K. J. Oswald, J. Wares, M. C. Freeman, J. Quattro, J. Leitner. Shoal basses, a clade of cryptic identity. 2015. In M. D. Tringali, J. M. Long, T. E. Birdsong and M. S. Allen (eds), Black Bass Diversity: Multidisciplinary Science for Conservation. American Fisheries Society Symposium 82, 449-466.

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Year Published: 2015

What is the Anthropocene?

Since Paul Crutzen and Eugene Stoermer introduced the word “Anthropocene” in 2000, scientists and nonscientists alike have used the word to highlight the concept that we are now living in a time when the global environment, at some level, is shaped by humankind rather than vice versa. Humans have significantly altered Earth’s...

Edwards, Lucy E.
Edwards, L. E. (2015), What is the Anthropocene?, Eos, 96, doi:10.1029/2015EO040297. Published on 30 November 2015.Eos, 96, doi:10.1029/2015EO040297

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Year Published: 2015

Disparity between state fish consumption advisory systems for methylmercury and US Environmental Protection Agency recommendations: A case study of the South Central United States

Fish consumption advisories are used to inform citizens in the United States about noncommercial game fish with hazardous levels of methylmercury (MeHg). The US Environmental Protection Agency (USEPA) suggests issuing a fish consumption advisory when concentrations of MeHg in fish exceed a human health screening value of 300 ng/g. However, states...

Adams, Kimberly; Drenner, Ray W.; Chumchal, Matthew M.; Donato, David I.

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Year Published: 2015

Estimating occupancy dynamics for large-scale monitoring networks: amphibian breeding occupancy across protected areas in the northeast United States

Regional monitoring strategies frequently employ a nested sampling design where a finite set of study areas from throughout a region are selected within which intensive sub-sampling occurs. This sampling protocol naturally lends itself to a hierarchical analysis to account for dependence among sub-samples. Implementing such an analysis within a...

Miller, David A.W.; Grant, Evan H. Campbell
Miller, D. A. W. and Grant, E. H. C., 2015, Estimating occupancy dynamics for large-scale monitoring networks: amphibian breeding occupancy across protected areas in the northeast United States: Ecology and Evolution, v. 5, no. 21, p. 4735-4746.

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Year Published: 2015

Evidence of population resistance to extreme low flows in a fluvial-dependent fish species

Extreme low streamflows are natural disturbances to aquatic populations. Species in naturally intermittent streams display adaptations that enhance persistence during extreme events; however, the fate of populations in perennial streams during unprecedented low-flow periods is not well-understood. Biota requiring swift-flowing habitats may be...

Katz, Rachel A.; Freeman, Mary
Katz, R. A. and Freeman, M. C., 2015, Evidence of population resistance to extreme low flows in a fluvial-dependent fish species: Canadian Journal of Fisheries and Aquatic Sciences, v. 11, no. 29, p. 1776-1787.

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Year Published: 2015

Topographic and Hydrographic GIS Datasets for the Afghanistan Geological Survey and U.S. Geological Survey 2014 Mineral Areas of Interest

Mineral extraction and associated industries play an important role in the Afghan economy, particularly in the “transitional era” of declining foreign aid and withdrawal of foreign troops post 2014. In addition to providing a substantial source of government revenue, other potential benefits of natural resource development include...

DeWitt, Jessica D.; Chirico, Peter G.; Malpeli, Katherine C.
DeWitt, J.D., Chirico, P.G., and Malpeli, K.C., 2015, Topographic and hydrographic GIS datasets for the Afghanistan Geological Survey and U.S. Geological Survey 2014 mineral areas of interest: U.S. Geological Survey Open-File Report 2015−1181, 27 p., http://dx.doi.org/10.3133/ofr20151181.

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Photograph of Head of the Meadow Beach shoreline

Head of the Meadow Beach video camera 2 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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