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: 5,256
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Year Published: 2019

Photosynthetic and respiratory responses of two bog shrub species to whole ecosystem warming and elevated CO2 at the boreal-temperate ecotone

Peatlands within the boreal-temperate ecotone contain the majority of terrestrial carbon in this region, and there is concern over the fate of such carbon stores in the face of global environmental changes. The Spruce and Peatland Response Under Changing Environments (SPRUCE) facility aims to advance the understanding of how such peatlands may...

Ward, Eric; Warren, Jeffrey M .; McLennan, David A; Dusenge, Mirindi E; Way, Danielle A.; Wullschleger, Stan D.; Hanson, Paul J

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Year Published: 2019

Comparison of methods for modeling fractional cover using simulated satellite hyperspectral imager spectra

Remotely sensed data can be used to model the fractional cover of green vegetation (GV), non-photosynthetic vegetation (NPV), and soil in natural and agricultural ecosystems. NPV and soil cover are difficult to estimate accurately since absorption by lignin, cellulose, and other organic molecules cannot be resolved by broadband multispectral data...

Dennison, Philip E.; Qi, Yi; Meerdink, Susan K.; Kokaly, Raymond; Thompson, David R.; Daughtry, Craig S.T.; Quemada, Miguel; Roberts, Dar A.; Gader, Paul; Wetherley, Erin; Numata, Izaya; Roth, Keely L.

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Year Published: 2019

Back to the future: Rebuilding the Everglades

Society values landscapes that are engrained in cultural tradition and have a rich connection with human history. As such, there has been a concerted effort to look at the pristine past and develop plans to move the past into the future. However, bringing the past back is constrained by hysteretic changes, irrevocable damages, and anthropogenic...

Sklar, Fred H.; Beerens, James M.; Brandt, Laura A.; Coronado-Molina, Carlos A.; Davis, Steven M; Frankovich, Tom; Madden, Christopher; McLean, Agnes; Trexler, Joel C.; Wilcox, Walter

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Year Published: 2019

Non-native marine fishes in Florida: Updated checklist, population status and early detection/rapid response

It has been ten years since the last comprehensive assessment of non-native marine fishes in Florida. Herein, we report sightings of 41 species from Florida coastal waters since the earliest reported sighting in 1984. Information is provided on the population status of each species (e.g., established, eradicated, unknown), and our early detection/...

Schofield, Pamela J.; Akins, Lad

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Year Published: 2019

Acoustic tag retention rate varies between juvenile green and hawksbill sea turtles

Background Biotelemetry has become a key tool for studying marine animals in the last decade, and a wide range of electronic tags are now available for answering a range of research questions. However, comparatively, less attention has been given to attachment methods for these tags and the implications of tag retention on study design, especially...

Selby, Thomas; Smith, Brian; Cherkiss, Michael; Crowder, Andrew; Hillis-Starr, Zandy; Pollock, Clayton; Hart, Kristen

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Year Published: 2019

The state of the world’s mangrove forests: Past, present, and future

Intertidal mangrove forests are a dynamic ecosystem experiencing rapid changes in extent and habitat quality over geological history, today and into the future. Climate and sea level have drastically altered mangrove distribution since their appearance in the geological record ∼75 million years ago (Mya), through to the Holocene. In contrast,...

Friess, Daniel A.; Rogers, Kerrylee; Lovelock, Catherine E.; Krauss, Ken; Hamilton, Stuart E.; Lee, Shing Yip; Lucas, Richard; Primavera, Jurgenne; Rajkaran, Anusha; Shi, Suhua

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Year Published: 2019

Enhancing reproductive assessments of the Florida manatee Trichechus manatus latirostris by establishing optimal time period and inhibin B baseline concentrations

The Florida manatee Trichechus manatus latirostris occupies coastal and riverine habitats that may influence the species’ endogenous biological rhythms, including its reproductive potential. Inhibin B provides a biomarker of gonadal function and reproductive potential in humans and other eutherian mammals. This study examined the...

Wetzel, Dana L; Reynolds, John Elliot; Bonde, Robert; Schloesser, Ryan W; Schwierzke-Wade, Leslie; Roudebush, William E

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Year Published: 2019

Urban stormwater: An overlooked pathway of extensive mixed contaminants to surface and groundwaters in the United States

Increasing global reliance on stormwater control measures to reduce discharge to surface water, increase groundwater recharge, and minimize contaminant delivery to receiving waterbodies necessitates improved understanding of stormwater-contaminant profiles. A multi-agency study of organic and inorganic chemicals in urban stormwater from 50 runoff...

Masoner, Jason R.; Kolpin, Dana W.; Cozzarelli, Isabelle M.; Barber, Larry B.; Burden, D.S.; Foreman, William T.; Forshay, Kenneth J.; Furlong, Edward; Groves, Justin F.; Hladik, Michelle; Hopton, Matthew E.; Jaeschke, Jeanne B.; Keefe, Steffanie H.; Krabbenhoft, David; Lowrance , Richard; Romanok, Kristin; Rus, David L.; Selbig, William R.; Williams, Brad; Bradley, Paul

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Year Published: 2019

Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2017

The U.S. Army Corps of Engineers, Jacksonville District, plans to deepen the St. Johns River channel in Jacksonville, Florida, from 40 to 47 feet along 13 miles of the river channel, beginning at the mouth of the river at the Atlantic Ocean, to accommodate larger, fully loaded cargo vessels. The U.S. Geological Survey, in cooperation with the U.S...

Ryan, Patrick J.
Ryan, P.J., 2019, Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2017: U.S. Geological Survey Open-File Report 2019–1078, 35 p., https://doi.org/10.3133/ofr20191078.

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Year Published: 2019

Incorporating uncertainty and risk into decision making to reduce nitrogen inputs to impaired waters

This article aims to understand decision making under uncertainty and risk, with a case study on Cape Cod, Massachusetts. Decision makers need to consider imperfect information on the cost and effectiveness of advanced nitrogen-removing on-site wastewater treatment systems as options to mitigate water quality degradation. Research included...

Martin, David M.; Johnson, Fred

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Year Published: 2019

Air pollution and respiratory hospital admissions in Shiraz, Iran, 2009 to 2015

Air pollution has been identified as one of the most challenging health issues in urban areas worldwide.The aim of this study was to investigate the association between short-term exposure to ambient air pollution and respiratory disease over a long-term period in Shiraz, one of the largest cities in Iran. Methods: hospital admissions...

Soleimani, Zahra; Darvishi Boloorani, Ali; Reza Khalifeh; Teymouri, Pari; Mesdaghinia, Alireza; Griffin, Dale W.

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Year Published: 2019

Predicting surf zone injuries along the Delaware coast using a Bayesian network

Personnel at Beebe Healthcare in Lewes, Delaware, collected surf zone injury (SZI) data for eight summer seasons from 2010 through 2017. Data include, but are not limited to, time of injury, gender, age, and activity. More than 2000 SZI events, including 196 spinal injuries and 6 fatalities, occurred at the five most populated beaches along the 25...

Doelp, Matthew; Puleo, Jack A.; Plant, Nathaniel G.

Filter Total Items: 500
Image: Alabama Sturgeon
September 11, 2008

Alabama Sturgeon

An endangered Alabama sturgeon from the Mobile River.

Image: Bucolic Country Lane in Florida
August 21, 2008

Bucolic Country Lane in Florida

This bucolic country lane in east central Florida is lined with cabbage palms and oaks, a scene that is made increasingly rare with ongoing pressures of urbanization.

An alligator rest on exposed limestone bedrock, sunning itself.
March 16, 2008

Alligator Resting in Afternoon Sun

Alligators are very abundant in the freshwater wetlands of Everglades National Park and can usually be seen along the Anhinga trail in the park, especially when water levels are low.  This ~5-foot gator is resting on exposed limestone bedrock alongside the trail.  

Image: An Endangered Red Hawksbill Sea Turtle Swims Over a Threatened Elkhorn Coral in Virgin Islands National Park
January 29, 2008

An Endangered Red Hawksbill Sea Turtle Swims Over a Threatened Elkhorn Coral in Virgin Islands National Park

This photo shows an endangered hawksbill (Eretmochelys imbricata) swimming over a colony of elkhorn coral (Acropora palmata).

USGS scientists are doing research on sea turtles and corals in Florida and the US Virgin Islands.

Satellite image showing a fire.
April 19, 2007

Georgia Fires, USA

The Georgia Fire consisted of two fires, the Sweat Farm Road fire and the Big Turnaround fire. The fires were located 10 miles (16 kilometers) southwest of Waycross, Georgia, and were separated by Swamp Road. The Sweat Farm Road fire, which began on April 16, 2007, burned more than 87 square miles (140 square kilometers) of forest and swampland in southeast Georgia.

Atlanta, Georgia: Impervious areas affect rainfall runoff, flooding, and water quality
December 31, 2005

Impervious areas affect rainfall runoff, flooding, and water quality.

Impervious areas can affect precipitation runoff and flooding, and water quality

If you are not familiar with the term "impervious surface," this picture of a typical landscape in suburban Atlanta, Georgia, USA, will help explain it. As cities grow and more development occurs, the natural landscape is replaced by roads, buildings, housing

Debris and trees clog upstream part of a highway bridge crossing Peachtree Creek, Atlanta, Ga.
July 10, 2003

Peachtree Creek, Atlanta, Ga. Debris from floods cause bridge problems

Peachtree Creek at Atlanta (USGS 02336300) Water Monitoring Site

Floods are powerful natural mechanisms that can move large amounts of debris seemingly easily. This picture shows the upstream side of a major highway bridge crossing Peachtree Creek in Atlanta, Ga. Looks like flood-borne trees and other debris that have gotten stuck on bridge

A picture of a cleared lot with construction equipment in TN
July 1, 2003

A cleared lot with construction equipment in TN

A grated lots with construction equiptment. Houses are in the background. The picture was taken in Tennesse as a part of a Land Cover Trends project field trip.

Filter Total Items: 393
September 22, 1998

Electricity may be out and communication lines cut off by the tremendous winds and torrential rains of Hurricane Georges, but thanks to good foresight in "hardening" monitoring systems by the U.S. Geological Survey, real-time streamflow data in Puerto Rico continued to flow to reservoir operators, emergency officials, and others who need streamflow information and need it fast.

September 2, 1998

As the Labor Day weekend approaches, scientists from the U.S. Geological Survey are heading for the beach. They are not packing the usual lounge chairs, cooler, and snorkel masks; their beach gear will include sidescan sonar equipment, a data acquisition system, sampler, and a navigation system. 

July 21, 1998

During the week of July 13-17, the U.S. Geological Survey (USGS) examined the coral reefs around Culebra, Puerto Rico.

June 25, 1998

The Asian swamp eel, a non-native fish, has been found in canals, ditches, streams and ponds near Tampa and Miami, Fla. 

June 18, 1998

Due to heavy rains pelting eastern Massachusetts in recent days, U.S. Geological Survey (USGS) field crews have been leaning precariously over the sides of bridges throughout the region to obtain accurate measurements of the amount (discharge) and height (stage) of water in swollen streams.

June 5, 1998

A minor earthquake, preliminary magnitude 3.2 according to the U.S. Geological Survey, occurred in North Carolina at 10:31 p.m. Eastern Daylight Time on June 4. The epicenter was about 10 miles (16 km) west-northwest of Kannapolis and about 20 miles (32 km) north of Charlotte.

May 29, 1998

From high mountain peaks to lowland rivers, chances are if you flip over a rock or peek in the crevices of a damp log in the Great Smoky Mountains, you just might find a red-cheeked, pygmy, or black-belly salamander. A lucky visitor may even find the rare Junaluska salamander or hear the chorus of serenading American toads after a severe spring storm.

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).

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).

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.

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.

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.

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