Unified Interior Regions

Region 1: North Atlantic-Appalachian

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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: 16,199
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Year Published: 2016

The swing of it: Hammock camping

Hammock camping is dramatically expanding along the Appalachian Trail and raising both questions and concerns among Trail land managers, club members, and backpackers. This article examines some of the advantages and disadvantages of hammock camping, including resource and social impacts. Some Leave No Trace hammock camping practices are included...

Marion, Jeffrey L.
Marion, Jeffrey L. 2016. The swing of it: Hammock camping. A.T. Journeys, Spring: 12-18.

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Year Published: 2016

U-Pb, Re-Os, and Ar/Ar geochronology of rare earth element (REE)-rich breccia pipes and associated host rocks from the Mesoproterozoic Pea Ridge Fe-REE-Au deposit, St. Francois Mountains, Missouri

Rare earth element (REE)-rich breccia pipes (600,000 t @ 12% rare earth oxides) are preserved along the margins of the 136-million metric ton (Mt) Pea Ridge magnetite-apatite deposit, within Mesoproterozoic (~1.47 Ga) volcanic-plutonic rocks of the St. Francois Mountains terrane in southeastern Missouri, United States. The breccia pipes cut the...

Aleinikoff, John N.; Selby, David; Slack, John F.; Day, Warren C.; Pillers, Renee M.; Cosca, Michael A.; Seeger, Cheryl; Fanning, C. Mark; Samson, Iain
Aleinikoff, J. N., Selby, D., Slack, J. F., Day, W. C., Pillers, R. M., Cosca, M. A., … Samson, I. M. (2016, November 16). U-Pb, Re-Os, and Ar/Ar Geochronology of Rare Earth Element (REE)-Rich Breccia Pipes and Associated Host Rocks from the Mesoproterozoic Pea Ridge Fe-REE-Au Deposit, St. Francois Mountains, Missouri. Economic Geology. Society of Economic Geologists. https://doi.org/10.2113/econgeo.111.8.1883

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Year Published: 2016

What are hierarchical models and how do we analyze them?

In this chapter we provide a basic definition of hierarchical models and introduce the two canonical hierarchical models in this book: site occupancy and N-mixture models. The former is a hierarchical extension of logistic regression and the latter is a hierarchical extension of Poisson regression. We introduce basic concepts of probability...

Royle, Andy
Kéry, M. and Royle, J.A., 2016, Chapter 2 – What Are Hierarchical Models and How Do We Analyze Them?, 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. 19-78.

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Year Published: 2016

Quantifying watershed-scale groundwater loading and in-stream fate of nitrate using high-frequency water quality data

We describe a new approach that couples hydrograph separation with high-frequency nitrate data to quantify time-variable groundwater and runoff loading of nitrate to streams, and the net in-stream fate of nitrate at the watershed-scale. The approach was applied at three sites spanning gradients in watershed size and land use in the Chesapeake Bay...

Miller, Matthew P.; Tesoriero, Anthony J.; Capel, Paul D.; Pellerin, Brian A.; Hyer, Kenneth E.; Burns, Douglas A.

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Year Published: 2016

Upper Maastrichtian ammonite biostratigraphy of the Gulf Coastal Plain (Mississippi Embayment, southern USA)

The Cretaceous outcrop belt of the Mississippi Embayment in the Gulf Coastal Plain (GCP) spans the Cretaceous/Paleogene (K/Pg) boundary. A detailed reconstruction of this time interval is critical for understanding the nature of biotic and environmental changes preceding the end-Cretaceous Mass Extinction event and for deciphering the likely...

Larina, Ekaterina; Garb, Matthew P.; Landman, Neil H.; Dastas, Natalie; Thibault, Nicolas; Edwards, Lucy E.; Phillips, George; Rovelli, Remy; Myers, Corinne; Naujokaityte, Jone
Larina, E., Garb, M., Landman, N., Dastas, N., Thibault, N., Edwards, L., Phillips, G., Rovelli, R., Myers, C., Naujokaityte, J., 2016, Upper Maastrichtian ammonite biostratigraphy of the Gulf Coastal Plain (Mississippi Embayment, southern USA), Cretaceous Research, v. 60, p. 128–151.

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Year Published: 2016

Spatial capture-recapture models allowing Markovian transience or dispersal

Spatial capture–recapture (SCR) models are a relatively recent development in quantitative ecology, and they are becoming widely used to model density in studies of animal populations using camera traps, DNA sampling and other methods which produce spatially explicit individual encounter information. One of the core assumptions of SCR models...

Royle, J. Andrew; Fuller, Angela K.; Sutherland, Chris
Royle, J. A., Fuller, A. K., and Sutherland, C., 2015, Spatial capture–recapture models allowing Markovian transience or dispersal: Population Ecology, v. Online Early November 21.

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Year Published: 2016

Transforming growth factor-β1 expression in endangered age-0 shortnose suckers (Chasmistes brevirostris) from Upper Klamath Lake, OR relative to histopathology, meristic, spatial, and temporal data

During July – September of 2008, 2009, and 2010 endangered age-0 juvenile shortnose suckers were sampled from Upper Klamath Lake, OR in a health evaluation that included the measurement of transforming growth factor – beta (TGF-β) expression in spleen in combination with a histopathology assessment. This analysis was performed to...

Ottinger, Christopher A.; Densmore, Christine L.; Robertson, Laura S.; Iwanowicz, Deborah D.; Vanderkooi, Scott P.

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Year Published: 2016

Evidence of estrogenic endocrine disruption in smallmouth and largemouth bass inhabiting Northeast U.S. National Wildlife Refuge waters: A reconnaissance study

Intersex as the manifestation of testicular oocytes (TO) in male gonochoristic fishes has been used as an indicator of estrogenic exposure. Here we evaluated largemouth bass (Micropterus salmoides) or smallmouth bass (Micropterus dolomieu) form 19 National Wildlife Refuges (NWRs) in the Northeast U.S. inhabiting waters on or near NWR lands for...

Iwanowicz, Luke R. ; Blazer, Vicki S.; Pinkney, A.E.; Guy, C.P.; Major, A.M.; Munney, K.; Mierzykowski, S.; Lingenfelser, S.; Secord, A.; Patnode, K.; Kubiak, T.J.; Stern, C.; Hahn, Cassidy M.; Iwanowicz, Deborah D.; Walsh, Heather L.; Sperry, Adam J.
Iwanowicz, L.R., Blazer, V.S., Pinkney, A.E., Guy, C.P., Major, A.M., Munney K., Mierzykowski, S.,, Lingenfelser, S., Secord, A., Patnode, K., Kubiak T.J., Stern, C., Hahn, C.M., Iwanowicz, D.D., Walsh, H.L., Sperry, A. (2016) Ecotoxicol Environ Saf. 124:50-59. Evidence of estrogenic endocrine disruption in smallmouth and largemouth bass inhabiting Northeast U.S. national wildlife refuge waters: A reconnaissance study. rry A2.

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Year Published: 2016

A global planktic foraminifer census data set for the Pliocene ocean

This article presents data derived by the USGS Pliocene Research, Interpretation and Synoptic Mapping (PRISM) Project. PRISM has generated planktic foraminifer census data from core sites and outcrops around the globe since 1988. These data form the basis of a number of paleoceanographic reconstructions focused on the mid-Piacenzian Warm Period (3...

Dowsett, Harry J.; Robinson, Marci M.; Foley, Kevin M.

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Year Published: 2016

Changes in seasonal climate outpace compensatory density-dependence in eastern brook trout

Understanding how multiple extrinsic (density-independent) factors and intrinsic (density-dependent) mechanisms influence population dynamics has become increasingly urgent in the face of rapidly changing climates. It is particularly unclear how multiple extrinsic factors with contrasting effects among seasons are related to declines in population...

Bassar, Ronald D.; Letcher, Benjamin H.; Nislow, Keith H.; Whiteley, Andrew R.

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Year Published: 2016

Estimated agricultural pesticide use for Southeast Stream-Quality Assessment, 2014

Introduction One of the goals of the U.S. Geological Survey (USGS) Southeast Stream-Quality Assessment (SESQA) is to characterize contaminants at perennial-stream sites throughout the southern Piedmont and southern Appalachian Mountains. The evaluation of pesticide inputs from agricultural sources will aid in that characterization. Methods used...

Baker, Nancy T.
Baker, N.T., 2016, Estimated agricultural pesticide use for Southeast Stream-Quality Assessment, 2014 (ver 2.1, July, 2016): U.S. Geological Survey Open-File Report 2015–1224, 5 p., http://dx.doi.org/10.3133/ofr20151224.

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Year Published: 2016

Brook trout passage performance through culverts

Culverts can restrict access to habitat for stream-dwelling fishes. We used passive integrated transponder telemetry to quantify passage performance of >1000 wild brook trout (Salvelinus fontinalis) attempting to pass 13 culverts in Quebec under a range of hydraulic and environmental conditions. Several variables influenced passage success,...

Goerig, Elsa; Castro-Santos, Theodore R.; Bergeron, Normand
Goerig, E., T. Castro-Santos, and N. Bergeron. 2016. Brook trout passage performance through culverts. Canadian Journal of Fisheries and Aquatic Sciences. 73:94-104. dx.doi.org/10.1139/cjfas-2015-0089