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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July Photo Contest

July Photo Contest

Check out the winning photographs in the July 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: 16,120
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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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Year Published: 2015

Porphyry copper assessment of the Tethys region of western and southern Asia: Chapter V in Global mineral resource assessment

A probabilistic mineral resource assessment of undiscovered resources in porphyry copper deposits in the Tethys region of western and southern Asia was carried out as part of a global mineral resource assessment led by the U.S. Geological Survey (USGS). The purpose of the study was to delineate geographic areas as permissive tracts for the...

Zientek, Michael L.; Hammarstrom, Jane M.; Johnson, Kathleen M.; Zürcher, Lukas; Bookstrom, Arthur A.; Hammarstrom, Jane M.; Mars, John C.; Ludington, Stephen; Zientek, Michael L.; Dunlap, Pamela; Wallis, John C.; Drew, Lawrence J.; Sutphin, David M.; Berger, Byron R.; Herrington, Richard J.; Billa, Mario; Kuşcu, Ilkay; Moon, Charles J.; Richards, Jeremy P.
Zürcher, L., Bookstrom A.A., Hammarstrom, J.M., Mars, J.C., Ludington, S., Zientek, M.L., Dunlap, P., and Wallis, J.C., with contributions from Drew, L.J., Sutphin, D.M., Berger, B.R., Herrington, R.J., Billa, M., Kuşcu, I., Moon, C.J. ,and Richards, J.P., 2015, Porphyry copper assessment of the Tethys region of western and southern Asia: U.S. Geological Survey Scientific Investigations Report 2010–5090–V, 232 p., and spatial data, http://dx.doi.org/10.3133/sir20105090V.

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Year Published: 2015

Simulating range-wide population and breeding habitat dynamics for an endangered woodland warbler in the face of uncertainty

Population viability analyses provide a quantitative approach that seeks to predict the possible future status of a species of interest under different scenarios and, therefore, can be important components of large-scale species’ conservation programs. We created a model and simulated range-wide population and breeding habitat dynamics for...

Adam Duarte; Hatfield, Jeffrey; Todd M. Swannack; Michael R. J. Forstner; M. Clay Green; Floyd W. Weckerly
Duarte, A., Hatfield, J. S., Swannack, T. M., Forstner, M. R. J., Green, M. C., and Weckerly, F. W., 2015, Simulating range-wide population and breeding habitat dynamics for an endangered woodland warbler in the face of uncertainty: Ecological Modelling, v. 320, no. 7691, p. 52-61.

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Year Published: 2015

Karst mapping in the United States: Past, present and future

The earliest known comprehensive karst map of the entire USA was published by Stringfield and LeGrand (1969), based on compilations of William E. Davies of the U.S. Geological Survey (USGS). Various versions of essentially the same map have been published since. The USGS recently published new digital maps and databases depicting the extent of...

Weary, David J.; Doctor, Daniel H.
Weary, D.J., and Doctor, D.H., Karst mapping in the United States: Past, present, and future: Geological Society of America Special Papers, 516, p. SPE516-04, first published on June 24, 2015, doi:10.1130/2015.2516(04)

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Year Published: 2015

Flushing of distal hillslopes as an alternative source of stream dissolved organic carbon in a headwater catchment

We investigated potential source areas of dissolved organic carbon (DOC) in headwater streams by examining DOC concentrations in lysimeter, shallow well, and stream water samples from a reference catchment at the Hubbard Brook Experimental Forest. These observations were then compared to high-frequency temporal variations in fluorescent dissolved...

Gannon, John P; Bailey, Scott W.; McGuire, Kevin J.; Shanley, James B.
Gannon, J.P., Bailey, S.W., McGuire, K.J., and Shanley, J.B., 2015, Flushing of distal hillslopes as an alternative source of stream dissolved organic carbon in a headwater catchment: Water Resources Research, v. 51, doi:10.1002/2015WR016927, 15 p.

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Year Published: 2015

Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in Quadrangle 6 of the Stellwagen Bank National Marine Sanctuary Region offshore of Boston, Massachusetts

The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration's National Marine Sanctuary Program, has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary (SBNMS) region since 1993. The area is approximately 3,700 square kilometers (km2) and is subdivided into...

Valentine, Page C.; Gallea, Leslie B.
Valentine, P.C., and Gallea, L.B., 2015, Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 6 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts: U.S. Geological Survey Scientific Investigations Map 3341, 10 sheets, scale 1:25,000, and 21-p. pamphlet, http://dx.doi.org/10.3133/sim3341.