Unified Interior Regions

Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands)

Regions L2 Landing Page Tabs

Filter Total Items: 376
Date published: January 1, 2005
Status: Completed

Water Use in Alabama, 2005

Water is one of the most important of Alabama's natural resources. Water is not only a vital component of human existence, it is critical to the overall quality of life. In order to protect and preserve this resource for future generations, we must have a baseline of information to make decisions. Decision and policy makers must know the answers to three fundamental questions: where is the...

Date published: January 1, 2005
Status: Completed

Water use, by county, in Alabama, 2005

Water is one of the most important of Alabama's natural resources. Water is not only a vital component of human existence, it is critical to the overall quality of life. In order to protect and preserve this resource for future generations, we must have a baseline of information to make decisions. Decision and policy makers must know the answers to three fundamental questions: where is the...

Date published: September 29, 2001
Status: Active

Alabama Statewide Flood Frequency

The magnitude and frequency of floods are important factors in the design of bridges, culverts, highway embankments, dams, and other hydraulic structures near streams. Information on flood magnitude and frequency is also used in flood plain management and development, and in establishing flood insurance rates. The objective of this project is to develop improved methods and equations for...

Filter Total Items: 5,062
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Year Published: 2019

Stable isotope analysis enhances our understanding of diamondback terrapin Malaclemys terrapin foraging ecology

Dietary studies on generalist predators may provide valuable information on spatial or temporal changes in the structure of ecological communities. We initiated this study to provide baseline data and determine the utility of stable isotope analysis (SIA) to evaluate the foraging strategies of an opportunistic reptilian predator, the diamondback...

Denton, Mathew J.; Demopoulos, Amanda W.J.; Baldwin, John D.; Smith, Brian; Hart, Kristen M.

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Year Published: 2019

Carbon storage potential in a recently created brackish marsh in eastern North Carolina, USA

Carbon (C) sequestration through accumulated plant biomass and storage in soils can potentially make wetland ecosystems net C sinks. Here, we collected GHG flux, plant biomass, and litter decomposition data from three distinct vegetation zones (Spartinaalterniflora, Juncus roemerianus and Spartina patens) on a 7-...

Shiau, Yo-Jin; Burchell, Michael R.; Krauss, Ken W.; Broome, Stephen W.; Birgand, Francois

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Year Published: 2019

Global dynamics of a mutualism–competition model with one resource and multiple consumers

Recent simulation modeling has shown that species can coevolve toward clusters of coexisting consumers exploiting the same limiting resource or resources, with nearly identical ratios of coefficients related to growth and mortality. This paper provides a mathematical basis for such as situation; a full analysis of the global dynamics of a new...

Wang, Yuanshi; Wu, Hong; DeAngelis, Donald L.

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Year Published: 2019

Characterizing residence patterns of North Atlantic right whales in the southeastern U.S. with a multistate open robust design model

Effective conservation of endangered North Atlantic right whales (Eubalaena glacialis) requires information about their spatio-temporal distribution. Understanding temporal distribution is particularly important, because a portion of the population migrates between high latitude summer feeding grounds off the northeastern U.S. and Canadian...

Krystan, A.M.; Gowan, T.A.; Kendall, William L.; Martin, Julien; Ortega-Ortiz, J.G.; Jackson, K.B.; Knowlton, A.R.; Naessig, P.; Zani, M.; Schulte, D.W.; Taylor, C.R.

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Year Published: 2019

A Bayesian approach to predict sub-annual beach change and recovery

The upper beach, between the astronomical high tide and the dune-toe, supports habitat and recreation along many beaches, making predictions of upper beach change valuable to coastal managers and the public. We developed and tested a Bayesian network (BN) to predict the cross-shore position of an upper beach elevation contour (ZlD) following 1...

Wilson, Kathleen; Lentz, Erika E.; Miselis, Jennifer L.; Safak, Ilgar; Brenner, Owen T.

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Year Published: 2019

Moving from generalisations to specificity about mangrove-saltmarsh dynamics

Spatial and temporal variability in factors influencing mangrove establishment and survival affects the distribution of mangrove, particularly near their latitudinal limit, where mangrove expansion into saltmarsh is conspicuous. In this paper the spatial variability in mangrove distribution and variability in factors influencing mangrove...

Rogers, Kerrylee; Krauss, Ken W.

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Year Published: 2019

Airborne bacteria in Earth’s lower stratosphere resemble taxa detected in the troposphere: results from a new NASA aircraft bioaerosol collector (ABC)

Airborne microorganisms in the upper troposphere and lower stratosphere remain elusive due to a lack of reliable sample collection systems. To address this problem, we designed, installed, and flight-validated a novel Aircraft Bioaerosol Collector (ABC) for NASA’s C-20A that can make collections for microbiological research investigations up to...

David J. Smith; Ravichandar, Jayamary D.; Jain, Sunit; Griffin, Dale W.; Yu, Hongbin; Tan, Qian; Thissen, James; Lusby, Terry; Nicoll, Patrick; Shedler, Sarah; Martinez, P.; Osorio, Alejandro; Lechniak, Jason; Choi, Samuel; Sabino, Kayleen; Iverson, Kathryn; Chan, Luisa; Jaing, Crystal; McGrath, John

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Year Published: 2019

The multiple-comparison trap and the Raven’s paradox—perils of using null hypothesis testing in environmental assessment

Detecting and quantifying environmental thresholds is frequently an important step in understanding ecological responses to environmental stressors. We discuss two statistical issues often encountered in threshold detection and quantification when statistical null hypothesis testing is used as a main analytical tool.The hidden multiple-comparison...

Qian, Song S.; Cuffney, Thomas F.

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Year Published: 2019

State-space models to infer movements and behavior of fish detected in a spatial array of acoustic receivers

We developed state-space models for inferring movements and behaviors of fish implanted with acoustic transmitters and detected within a spatial array of stationary acoustic receivers. In these models fish movements and behavior switching are specified using a hidden Markov model of the changes in an individual's latent activity center. The...

Price, Melissa E.; Dorazio, Robert

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Year Published: 2019

Sturgeon in the Sacramento-San Joaquin watershed: new insights to support conservation and management

The goal of a day-long symposium on March 3, 2015, Sturgeon in the Sacramento–San Joaquin Watershed: New Insights to Support Conservation and Management, was to present new information about the physiology, behavior, and ecology of the green (Acipenser medirostris) and white sturgeon (Acipenser transmontanus) to help guide enhanced management and...

Klimley, A Peter; Chapman, Eric D; Cech Jr, J. J.; Cocherell, Dennis E.; Fangue, Nann A.; Gingras, Marty; Jackson, Zachary; Miller, Emily A; Mora, Ethan A.; Poletto, Jamilynn B; Schreier, Andrea M; Seesholtz, Alicia; Sulak, Kenneth J.; Thomas, Michael J.; Woodbury, David; Wyman, Megan T.

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Year Published: 2018

Water use in Louisiana, 2015

In 2015, approximately 8,720 million gallons per day (Mgal/d) of water was withdrawn from groundwater and surface-water sources in Louisiana, a 2.6 percent increase from 2010. Total groundwater withdrawals were about 1,750 Mgal/d, an increase of 12 percent from 2010, and total surface-water withdrawals were about 6,970 Mgal/d, an increase of 0.44...

Robinson, Angela L.; Sargent, B. Pierre

Filter Total Items: 488
A picture of a logging trunk in Tennessee
July 1, 2003

A logging truck in Tennessee

A logging truck in Tennessee. The picture was taken as a part of a Land Cover Trends project field trip.

A picture of hay bales in a hay field in TN
July 1, 2003

Hay bales in a hay field in TN

Hay bales in a hay field in Tennessee. This picture was taken as part of a Land Cover Trends project field trip.

Tadpole with SPI
December 19, 2002

Tadpole with SPI

This tadpole shows signs of a severe Perkinsea infection. 

Tadpole with organ failure
December 19, 2002

Tadpole with organ failure

This tadpole shows signs of severe Perkinsea infection, which causes organ failure. 

Image: Lindbergh Beach, U.S. Virgin Islands
May 31, 2002

Lindbergh Beach, U.S. Virgin Islands

A view toward the ocean, featuring a white sand beach, the ocean, and a Seagrape tree partially blocking a palm tree.

Image: Florida Bay
December 13, 1999

Florida Bay

Looking south from the Black Betsy Keys shore, onto waters of Florida Bay. On the horizon, Key islands separate the green bay waters from the blue cloud-filled skies.

Image: Florida Bay sunset
December 11, 1999

Florida Bay sunset

The sky filled with a profusion of colors as the sun slowly set behind this mangrove island in Florida Bay, at the south end of Everglades National Park.

View looking up-stream toward Carraizo Dam, under drought conditions, 1994
December 31, 1994

View looking up-stream toward Carraizo Dam, under drought conditions

View looking up-stream toward Carraizo Dam in Loiza, Puerto Rico, under drought conditions.

Image: Winter Park Florida Sinkhole of 1981
May 10, 1981

Winter Park Florida Sinkhole of 1981

Photo 15 of 15: Water level in sinkhole chimney stabilized since the previous day. View to south across the sinhole. In the following weeks and months, the water level in the sinkhole continued to rise, a likely result of the plugging of the conduit into the Floridan aquifer with the sinkhole debris, fill subsequently emplaced by the city, and natural consolidation

...
Image: Winter Park Florida Sinkhole of 1981
May 9, 1981

Winter Park Florida Sinkhole of 1981

Photo 14 of 15: Remnants of community pool in sinkhole. View to east across the sinkhole.

Filter Total Items: 389
USGS
April 21, 1998

Water quality is generally good in the Georgia-Florida Coastal Plain but has been adversely affected by agricultural and urban land uses in some areas, according to the results of a five-year investigation by the U.S. Geological Survey (USGS).

USGS
April 16, 1998

Concentrations of phosphorus and nitrogen have generally declined since 1980 in streams draining into the Albemarle and Pamlico Sounds in North Carolina but remain high enough to cause water-quality problems in the Neuse and Tar-Pamlico Rivers, according to the results of a 5-year investigation by the U.S. Geological Survey (USGS).

USGS
April 13, 1998

A minor earthquake, preliminary magnitude 3.9 according to the U.S. Geological Survey, occurred in South Carolina at 5:56 a.m. Eastern Daylight Time on April 13. The epicenter was about 25 miles (40 km) north-northeast of Camden, S.C.

USGS
December 16, 1997

A mysterious disease that has killed bald eagles and American coots in southwest Arkansas may now be present in two other states, according to wildlife disease specialists at the U.S. Geological Survey’s National Wildlife Health Center in Madison, Wisconsin.

USGS
December 12, 1997

Further analysis by U.S. Geological Survey seismologists has confirmed that the seismic waves recorded earlier today (corrected time: 3:42 am EST) were generated by the collapse of a mine. The longwall coal mine, is located 35 miles east northeast of Tuscaloosa, Alabama. No other damage or injuries occurred. Shaking was felt only in the immediate vicinity of the mine.

USGS
November 13, 1997

The U.S. Geological Survey is expanding its capabilities in hormone research, studying the role contaminants may play in the reproductive development of amphibian, fish and mussel species.

USGS
October 24, 1997

"This morning’s earthquake in southern Alabama was a wake-up call in more ways than one," said Dr. Mark Schaefer, Acting Director of the U.S. Geological Survey. "It serves to remind all of us that earthquakes are not restricted to California, Washington, and Alaska. The East is earthquake country, too."

USGS
September 12, 1997

Federal and local biologists captured and tagged three manatees in early August near Mayaguez, Puerto Rico, as part of efforts to better protect West Indian manatees inhabiting this Caribbean island.

USGS
September 2, 1997

Scientists explored a unique reef in the Florida Keys National Marine Sanctuary.

USGS
August 20, 1997

Managers and planners representing Federal, state, and local government agencies and private organizations will gather in Fort Lauderdale on Monday for a 3-day conference (August 25 - 27) to discuss the latest results of more than 50 scientific investigations by the U.S. Geological Survey in South Florida.

USGS
July 30, 1997

An earthquake with a preliminary magnitude of 3.8 occurred in northeastern Tennessee, Wednesday, July 30, 1997 according to the U.S. Geological Survey.

USGS
November 21, 1996

The gasoline additive MTBE (methyl tert-butyl ether) was detected in some urban stormwater samples collected in 16 cities and metropolitan areas by the U.S. Geological Survey, but all detections of MTBE were less than the lower limit of the U.S. Environmental Protection Agency’s draft lifetime health advisory for drinking water.

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