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: 1,148
Date published: March 22, 2018
Status: Active

Occupancy

Many wildlife studies seek to understand changes or differences in the proportion of sites occupied by a species of interest. These studies are hampered by imperfect detection of these species, which can result in some sites appearing to be unoccupied that are actually occupied. Occupancy models solve this problem and produce unbiased estimates of occupancy (ie, occurrence) and related...

Date published: March 21, 2018
Status: Active

Assessment of pathogen sources to Hook Pond, East Hampton, New York

Background In order to help identify sources of high Enterococci concentrations identified by the Village of East Hampton and the Surfrider Foundation’s water-quality sampling upstream of Hook Pond, surface water and groundwater samples will be collected and analyzed for F+-specific coliphage, bacteroides, Enterococci and fecal coliform, and nitrogen isotopes. Potential sources of pathogens...

Contacts: Shawn C Fisher
Date published: March 21, 2018
Status: Active

Adaptive Management

Adaptive management (AM) combines management and monitoring, with the aim of updating knowledge and improving decision-making over time. We provide a guide for managers who may realize the potential of AM, but are unsure where to start. The urgent need for iterative management decisions, the existence of uncertainty, and the opportunity for learning offered by often highly-controlled captive...

Date published: March 21, 2018
Status: Active

Capture-Mark-Recapture Science

Capture-Mark-Recapture (CMR) can be viewed as an animal survey method in which the count statistic is the total number of animals caught, and the associated detection probability is the probability of capture.  The method involves capturing a number of animals, marking them, releasing them back into the population, and then determining the ratio of marked to unmarked animals in the population...

Date published: March 21, 2018
Status: Active

Assessment of the Water Quality of Hook Pond, East Hampton, New York

PROBLEM Hook Pond, an 83-acre freshwater pond in East Hampton, N.Y., has historically shown indications of impaired water quality. Impairments in this shallow pond include elevated nutrient concentrations and low dissolved oxygen concentrations in bottom waters as a result of current and historical land-use practices (Lombardo, 2015). Recent (2016) harmful algal blooms in Hook Pond and other...

Contacts: Shawn C Fisher
Date published: March 20, 2018
Status: Active

Mathematical Modeling

A formal framework that revolves around the construction of a mathematical expression using equations, statements or formulas as representation of a system, behavior, or process to  simulate the behavior of the system, a series of relationships, or process under study.

Date published: March 19, 2018
Status: Active

North American Breeding Bird Survey

The North American Breeding Bird Survey (BBS) is the primary source for critical quantitative data to evaluate the status of continental bird species, keeping common birds common and helping fuel a $75 billion wildlife watching industry.  Each year thousands of citizen scientists skilled in avian identification collect data on BBS routes throughout North America allowing us to better...

Date published: March 19, 2018
Status: Active

Breeding Birds

Patuxent science expands our understanding of the ecological relationships between breeding bird communities and their habitats. For example, Patuxent scientists follow structured decision-making principles to optimize the management of fresh-water and salt-marsh habitats to benefit wetland bird communities. Following pioneering studies documenting the effects of forest fragmentation on...

Date published: March 19, 2018
Status: Active

Population Estimation

Determining the size of animal populations is fundamental to wildlife management and how such populations change over time and space can provide insights into ecosystem function and associated processes.   Patuxent scientists’ utilize a number of robust statistical techniques to generate these estimates and to improve our understanding of population dynamics.

Date published: March 19, 2018
Status: Active

Migration

Bird migration remains a topic of active research through the use of new technology to provide insights relevant for the conservation of migratory birds. Satellite telemetry is used to study the movements of sea ducks and other waterbirds along the Atlantic Coast, useful data to better understand the potential impacts of offshore energy development. Radar technology is used to study the...

Date published: March 19, 2018
Status: Active

Waterbirds

Patuxent has a long history of research activities supporting the management and conservation of waterbird populations. Current research interests include studying the movements and migration ecology of sea ducks and other waterbirds along the Atlantic Coast, a long-term demographic study of Roseate Tern populations, and the use of restored island habitats by nesting terns. Patuxent scientists...

Date published: March 19, 2018
Status: Active

Gas Hydrates - Primer

What is Gas Hydrate?

 

Gas hydrate is an ice-like crystalline form of water and low molecular weight gas (e.g., methane, ethane, carbon dioxide). On Earth, gas hydrates occur naturally in some marine sediments and within and beneath permafrost. Gas hydrates have also been inferred on other planets or their moons.

At the molecular level, gas hydrate...

Filter Total Items: 15,993
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Year Published: 2019

Amphibian conservation in the Anthropocene

Research is necessary to identify patterns in nature, to understand how a system functions, and to make predictions about the future state of an ecosystem. Applied research in conservation biology can identify effective strategies to maintain biodiversity, though many papers end with the conclusion that more research is needed. However, more...

Campbell Grant, Evan H.; Muths, Erin L.; Schmidt, Benedikt R.; Petrovan, Silviu

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Year Published: 2019

Changes in hydrodynamics and wave energy as a result of seagrass decline along the shoreline of a microtidal back-barrier estuary

Seagrasses are marine flowering plants that provide key ecological services. In recent decades, multiple stressors have caused a worldwide decline in seagrass beds. Changes in bottom friction associated with seagrass loss are expected to influence the ability of estuarine systems to trap sediment inputs through local and regional changes in...

Donatelli, Carmine; Ganju, Neil Kamal; Kalra, Tarandeep S.; Fagherazzi, S; Leonardi, Nicoletta

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Year Published: 2019

Estimating domestic well locations and populations served in the contiguous U.S. for years 2000 and 2010

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. The 1990 census was...

Johnson, Tyler D.; Belitz, Kenneth; Lombard, Melissa

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Year Published: 2019

Nonlinearities in transmission dynamics and efficient management of vector-borne pathogens

Integrated Pest Management (IPM) is an approach to minimizing economic and environmental harm caused by pests, and Integrated Vector Management (IVM) uses similar methods to minimize pathogen transmission by vectors. The risk of acquiring a vector-borne infection is often quantified using the density of infected vectors. The relationship between...

Ginsberg, Howard S.; Couret, Jannelle

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Year Published: 2019

Genetic tagging in the Anthropocene: Scaling ecology from alleles to ecosystems

The Anthropocene is an era of marked human impact on the world. Quantifying these impacts 51 has become central to understanding the dynamics of coupled human-natural systems, resource52 dependent livelihoods, and biodiversity conservation. Ecologists are facing growing pressure to 53 quantify the size, distribution, and trajectory of wild...

Clayton T Lamb; Adam T Ford; Michael Proctor; Royle, Andy; Garth Mowat

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Year Published: 2019

Effect of amphibian chytrid fungus (Batrachochytrium dendrobatidis) on apparent survival of frogs and toads in the western USA

Despite increasing interest in determining the population-level effects of emerging infectious diseases on wildlife, estimating effects of disease on survival rates remains difficult. Even for a well-studied disease such as amphibian chytridiomycosis (caused by the fungus Batrachochytrium dendrobatidis [Bd]), there are few estimates of...

Russell, Robin E.; Halstead, Brian J.; Mosher, Brittany; Muths, Erin L.; Adams, Michael J.; Campbell Grant, Evan H.; Fisher, Robert N.; Kleeman, Patrick M.; Backlin, Adam R.; Pearl, Christopher; Honeycutt, R. Ken; Hossack, Blake R.

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Year Published: 2019

Energy depletion and stress levels of Sockeye Salmon migrating at the northern edge of their distribution

The physiological challenge for anadromous fish to migrate upriver is influenced by river temperature, but the impacts of river temperature can be difficult to predict due to an incomplete understanding of how temperature influences migration costs, especially in high‐latitude (>60°N) ecosystems. To assess temperature influences on migrating...

Carey, Michael P.; Keith, Kevin D.; Schelske, Merlyn; Lean, Charlie; McCormick, Stephen D.; Regish, Amy M.; Zimmerman, Christian E.

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Year Published: 2019

Estimating connectivity of hard clam (Mercenaria mercenaria) and eastern oyster (Crassostrea virginica) larvae in Barnegat Bay

Many marine organisms have a well-known adult sessile stage. Unfortunately, our lack of knowledge regarding their larval transient stage hinders our understanding of their basic ecology and connectivity. Larvae can have swimming behavior that influences their transport within the marine environment. Understanding the larval stage provides insight...

Goodwin, J.D.; Munroe, D.M.; Defne, Zafer; Ganju, Neil Kamal; Vasslides, James

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Year Published: 2019

Managing the trifecta of disease, climate, and contaminants: Searching for robust choices under multiple sources of uncertainty

Wood frogs, like other amphibian species worldwide, are experiencing population declines due to multiple stressors. In the northeastern United States, wood frog declines are thought to result from a reduction in successful metamorphosis in part due to climate change, disease (specifically ranavirus) and contaminant exposure. The presence of...

Smalling, Kelly; Eagles-Smith, Collin; Katz, Rachel A.; Grant, Evan

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Year Published: 2019

Early genetic outcomes of American black bear reintroductions in the Central Appalachians, USA

Habitat loss and overexploitation extirpated American black bears (Ursus americanus) from most of the Central Appalachians, USA, by the early twentieth century. To attempt to restore bears to the southwestern portion of this region, 2 reintroductions that used small founder groups (n = 27 and 55 bears), but different release methods (hard versus...

Murphy, Sean M.; Hast, John T.; Augustine, Ben C.; Weisrock, David W.; Clark, Joseph D.; Kocka, David. M; Ryan, Christopher W.; Sajecki, Jaime L.; Cox, John J.

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Year Published: 2019

Spatially explicit network analysis reveals multi-species annual cycle movement patterns of sea ducks

Conservation of long-distance migratory species poses unique challenges. Migratory connectivity—that is, the extent to which groupings of individuals at breeding sites are maintained in wintering areas—is frequently used to evaluate population structure and assess use of key habitat areas. However, for species with complex or variable annual-cycle...

Lamb, Juliet S.; Paton, Peter WC; Osenkowski, Jason E; Badzinski, Shannon S.; Berlin, Alicia; Bowman, Timothy D.; Dwyer, Chris; Fara, Luke; Gilliland, Scott G; Kenow, Kevin P.; Lepage, Christine; Mallory, Mark L.; Olsen, Glenn; Perry, Matthew; Petrie, Scott A.; Savard, Jean-Pierre L.; Savoy, Lucas; Schummer, Michael L.; Spiegel, Caleb S; McWilliams, Scott R.

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Year Published: 2019

Evidence for a role of arginine vasotocin (AVT) receptors in the gill during salinity acclimation by a euryhaline teleost fish

The neurohypophysial nonapeptide arginine vasotocin (AVT) plays a role in regulation of osmotic balance in teleost fishes, but its mechanisms of action are not fully understood. Recently, is was discovered that nonapeptide receptors differentiated into V1a-type, several V2-type, and two isotocin (IT) receptor paralogs in teleost fishes, and it...

Lema, Sean C; Washburn, Elise H; Crowley, Mary E; Carvalho, Paul G; Egelston, Jennifer N; McCormick, Stephen D.

Filter Total Items: 1,718
Photograph of USGS personnel in front of an active volcano
July 31, 2018

Night Shift

Woods Hole Coastal and Marine Science Center's Aerial Imaging and Mapping Unmanned Aerial Systems (UAS) pilots, Emily Sturdivant (left) and Elizabeth Pendleton (right) working the night shift in Hawaii at the Kileaua volcano site.  

Photograph of Neil Ganju presenting at SSEAT
July 31, 2018

USGS teaches the teachers

Woods Hole Costal and Marine Science Center staff offered a presentation and handouts on Natural Hazards and Coastal Hazards in Wetlands and Estuaries  Smithsonian Science Education Academies for Teachers (SSEATs)

Photograph of Meagan Gonneea at SSEAT
July 31, 2018

USGS scientists teach the teachers

Woods Hole Costal and Marine Science Center staff offered a presentation and handouts on Natural Hazards and Coastal Hazards in Wetlands and Estuaries  at the Smithsonian Science Education Academies for Teachers (SSEATs)

Graphite schist from the Roanoke Rapids terrane in southeastern Virginia.
July 31, 2018

Roanoke Rapids Graphite Schist, VA

Graphite schist from the Roanoke Rapids terrane in southeastern Virginia.  Economic deposits of this critical mineral may exist in this relatively unexplored region, which has not been adequately mapped at scales larger than 1:250,000. 

Staurolite weathering out of schist in the along the eastern edge of the Roanoke Rapids terrane in southeastern Virginia.
July 31, 2018

Staurolite Weathering out of Schist, Roanoke Rapids

Staurolite weathering out of schist along the eastern edge of the Roanoke Rapids terrane in southeastern Virginia.  Is this greenschist-facies schist part of the suprastructural Roanoke Rapids terrane, or part of a heretofore undefined higher-grade infrastructural terrane to the east? 

Image of an outcrop of quartzite within the Roanoke Rapids terrane near Coleman Lake.
July 31, 2018

Outcrop of Quartzite Within the Roanoke Rapids

An outcrop of quartzite within the Roanoke Rapids terrane near Coleman Lake.  Laser ablation inductively coupled plasma mass spectrometry U-Pb geochronology on detrital zircon grains within this unit (conducted by the USGS LA-ICPMS Lab in Denver) will provide critical and precise geochronologic age control as a geologic framework model is developed and compiled for the

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Image of an outcrop of blue quartz-bearing granite within the Roanoke Rapids terrane.
July 31, 2018

Outcrop of Blue Quartz-Bearing Granite, Roanoke Rapids

An outcrop of blue quartz-bearing granite within the Roanoke Rapids terrane.  Sensitive high-resolution ion microprobe U-Pb geochronology will precisely determine the age of this rock (conducted by the USGS-Stanford SHRIMP Lab in Menlo Park) and will provide critical geochronologic age control as a geologic framework model is developed and complied for the easternmost

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man and woman near red USGS truck under blue canopy using groundwater sampling equipment
July 17, 2018

Groundwater Sampling in Nassau County, Long Island, New York

Groundwater Sampling in Nassau County, Long Island, New York

Dr. Meagan Gonneea (Cape Cod, MA) retrieves a core from an infilling salt marsh pond in the Great Barnstable Marsh
July 9, 2018

Core retrieval

Dr. Meagan Gonneea (Cape Cod, MA) retrieves a core from an infilling salt marsh pond in the Great Barnstable Marsh.

Filter Total Items: 590