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: 371
Date published: May 10, 2018
Status: Active

Joint Ecosystem Modeling: Alligator Production Probability Model

Because the American alligator (Alligator mississippiensis) is a keystone species of the Everglades ecosystem, managers need a way to quantitatively assess the effects of alternative restoration scenarios on alligators.

Date published: May 7, 2018
Status: Active

Sea turtle nesting on Eglin Air Force Base property, Cape San Blas, Florida

The Northwestern Atlantic population of loggerhead sea turtles is one of the largest in the world. Genetic studies have divided this population into 5 management units including a genetically distinct group that nests throughout the northern Gulf of Mexico (GoM).

Date published: April 30, 2018
Status: Active

Mapping Florida's Coastal Waters

The FCMaP approach divides Florida into 6 regions that are geologically and physiographically distinct in terms of coastal characteristic.

Date published: April 30, 2018
Status: Active

Georgia Statewide Water-quality Monitoring Program

The US Geological Survey (USGS) has cooperated with the State of Georgia to monitor water quality throughout the State since 1937. The current Statewide Water-quality Montoring Program is a network of 50 stations across Georgia operated in cooperation with the Environmental Protection Division of the Georgia Department of Natural Resources (GAEPD). Over the years, the temporal and spatial...

Date published: April 2, 2018
Status: Completed

Heavy-Mineral Sand Resources in the Southeastern U.S.

We are assessing the extent of industrial mineral resources hosted by heavy-mineral sands in the coastal plain of the southeastern United States. “Heavy-mineral sands" (HMS) is a term commonly used in industry and geologic literature to describe layered sediments deposited in coastal environments that contain dense (“heavy") minerals of economic value. The heavy minerals extracted from these...

Date published: March 30, 2018
Status: Completed

Geophysical Infrastructure Study: Jim Woodruff Lock and Dam

 A study site of the Geophysical Infrastructure Studies: Earthen Dams and Abandoned Mine Lands project.

Contacts: Bethany Burton
Date published: March 30, 2018
Status: Active

The Florida Coastal Mapping Program

The Florida Coastal Mapping Program (FCMaP) is an initiative between Federal and Florida State agencies and institutions to coordinate and facilitate the collection and accessibility of Florida coastal seafloor data in order to fill priority areas and gaps.

Contacts: Xan Fredericks, James Flocks, Chery Hapke, Ph.D., Kim Jackson, James Garey, Ph.D.
Date published: March 20, 2018
Status: Active

Coastal Change

The continued devastation from recent hurricanes and tropical storms demonstrates the vulnerability of coastal communities to coastal-change hazards. Changes in sea level and storm-wave intensity are changing the areas that are prone to erosion and storm-related flooding. The Hazards Vulnerability Team has worked with USGS coastal researchers and partners to improve our understanding of...

Date published: March 12, 2018
Status: Active

Brazilian Agencies Partner With USGS On Water Programs

The USGS International Programs Office has intermittentantly collaborated with Brazil's Geological Survey (CPRM) since the early 1970's. With the creation of the Brazilian National Water Agency (ANA), Brazil's hydrologic monitoring network has taken on a higher socioeconomic importance. 

The collaboration agreements between USGS and ANA/CPRM have strengthened the Brazilian streamgaging...

Contacts: Brian McCallum
Date published: February 28, 2018
Status: Active

Measuring Coral Growth to Help Restore Reefs

It is critical to start measuring calcification rates in a systematic way now, particularly at subtropical latitudes where conditions fluctuate seasonally, so that we can understand how dynamic ocean conditions affect calcifying organisms today and predict possible changes in the future. We established a calcification monitoring network in the Florida Keys and have been measuring calcification...

Filter Total Items: 5,356
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Year Published: 2021

Identifying information gaps in predicting winter foraging habitat for juvenile Gulf Sturgeon

The Gulf Sturgeon Acipenser oxyrinchus desotoi is an anadromous species that inhabits Gulf of Mexico coastal waters from Louisiana to Florida and is listed as threatened under the U.S. Endangered Species Act. Seasonal cues (e.g., freshwater discharge) determine the timing of spawning and migration and may influence the availability of...

Dale, Leah L; Cronin, James P.; Brink, Virginia; Tirpak, Blair; Tirpak, John M.; Pine, William E.

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Year Published: 2021

Strategic habitat conservation for beach mice: Estimating management scenario efficiencies

The Perdido Key beach mouse (Peromyscus polionotus trissyllepsis), Choctawhatchee beach mouse (P. p. allophrys), and St. Andrew beach mouse (P. p. peninsularis) are 3 federally endangered subspecies that inhabit coastal dunes of Alabama and Florida, USA. Conservation opportunities for these subspecies are limited and costly. Consequently, well‐...

Cronin, James P.; Tirpak, Blair; Dale, Leah L; Robenski, Virginia E; Tirpak, John M.; Marcot, Bruce G.

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Year Published: 2021

Effective population size remains a suitable, pragmatic indicator of genetic diversity for all species, including forest trees

Fady & Bozzano highlight some challenges to a proposed Convention on Biological Diversity (CBD) indicator of genetic diversity based on effective population size, Ne (Fady and Bozzano, 2020; Hoban et al., 2020). We appreciate the thoughtful debate and concur that genetic diversity indicators must be reliable and scalable. We fully agree...

Hoban, Sean M.; Paz-Vinas, Ivan; Aitken, Sally; Bertola, Laura D.; Breed, Martin F; Bruford, Michael W.; Funk, W. Chris; Grueber, Catherine E.; Heuertz, Myriam; Hohenlohe, Paul A.; Hunter, Margaret; Jaffé, Rodolfo; Lopes Fernandes, Margarida; Mergeay, Joachim; Moharrek, Farideh; O’Brien, David; Segelbacher, Gernot; Vernesi, Cristiano; Waits, Lisette; Laikre, Linda

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Year Published: 2021

Seasonal periphyton response to low-level nutrient exposure in a least disturbed mountain stream, the Buffalo River, Arkansas

Like most streams located in the Ozark Plateaus, the Buffalo River in Arkansas generally has excellent water quality. Water-quality conditions in Big Creek, however, a major tributary of the middle Buffalo River, have been less favorable than that of other Buffalo River tributaries. Concerns regarding the influence of water quality in Big Creek on...

Justus, Billy; Driver, Lucas; Burge, David R. L.

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Year Published: 2021

The impact of ventilation patterns on calcite dissolution rates within karst conduits

Erosion rates in streams vary dramatically over time, as differences in streamflow and sediment load enhance or inhibit erosion processes. Within cave streams, and other bedrock channels incising soluble rocks, changes in water chemistry are an important factor in determining how erosion rates will vary in both time and space. Prior studies in...

Covington, Matthew D.; Knierim, Katherine J.; Young, Holly H; Rodriguez, Josue; Gnoza, Hannah

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Year Published: 2021

Small mammal responses to wetland restoration in the Greater Everglades ecosystem

Wetlands have experienced dramatic losses in extent around the world, disrupting ecosystem function, habitat, and biodiversity. In Florida’s Greater Everglades, a massive restoration effort costing billions of dollars and spanning multiple decades is underway. As Everglades restoration is implemented in incremental projects, scientists and...

Romanach, Stephanie; D'Acunto, Laura; Chapman, Julia; Hanson, Matthew R

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Year Published: 2021

A comparison of plant communities in restored, old field, and remnant coastal prairies

Temperate grasslands are experiencing worldwide declines due to habitat conversion. Grassland restoration efforts are employed to compensate for these losses. However, there is a need to better understand the ecological effects of grassland restoration and management practices. We investigated the effects of three different grassland management...

Feher, Laura; Allain, Larry; Osland, Michael; Pigott, Elisabeth; Reid, Christopher; Latiolais, Nicholas

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Year Published: 2021

Sediment dynamics of a divergent bay–marsh complex

Bay–marsh systems, composed of an embayment surrounded by fringing marsh incised by tidal channels, are widely distributed coastal environments. External sediment availability, marsh-edge erosion, and sea-level rise acting on such bay–marsh complexes may drive diverse sediment-flux regimes. These factors reinforce the ephemeral and dynamic nature...

Nowacki, Daniel J. ; Ganju, Neil Kamal

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Year Published: 2021

Stress gradients interact with disturbance to reveal alternative states in salt marsh: Multivariate resilience at the landscape scale

Stress gradients influence many ecosystem processes and properties, including ecosystem recovery from and resistance to disturbance. While recent analytical approaches have advanced multivariate metrics of ecosystem resilience that allow quantification of conceptual resilience models and identification of thresholds of state change, these...

Jones, Scott; Stagg, Camille; Yando, Erik S.; James, W. Ryan; Buffington, Kevin J.; Hester, Mark W.

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Year Published: 2021

Germination potential of baldcypress (Taxodium distichum) swamp soil seed bank along geographical gradients

Changing environments of temperature, precipitation and moisture availability can affect vegetation in ecosystems, by affecting regeneration from the seed bank. Our objective was to explore the responses of soil seed bank germination to climate-related environments along geographic gradients. We collected seed banks in baldcypress (Taxodium...

Lei, Ting; Middleton, Beth

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Year Published: 2021

Carrying capacity of spatially distributed metapopulations

Carrying capacity is a key concept in ecology. A body of theory, based on the logistic equation, has extended predictions of carrying capacity to spatially distributed, dispersing populations. However, this theory has only recently been tested empirically. The experimental results disagree with some theoretical predictions of when they are...

Zhang, Bo; DeAngelis, Don; Ni, Wei-Ming

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Year Published: 2021

Surface elevation change evaluation in mangrove forests using a low‐cost, rapid‐scan terrestrial laser scanner

Mangrove forests have adapted to sea level rise (SLR) increases by maintaining their forest floor elevation via belowground root growth and surface sediment deposits. Researchers use surface elevation tables (SETs) to monitor surface elevation change (SEC) in mangrove forests, after which this information is used to assess SLR resiliency or to...

Kargar, Ali Rouzbeh; MacKenzie, Richard A.; Fafard, Alexander; Krauss, Ken; van Aardt, Jan

Filter Total Items: 498
A desmid alga is bright red and green photographed in UV light
December 31, 2017

This single-celled alga is a natural ornament

It looks like a holiday ornament, but this lovely object is a single-celled freshwater alga from the desmid family, found in the marshes of Florida’s Arthur R. Marshall Loxahatchee National Wildlife Refuge. USGS biologist Barry Rosen photographed it at 200x magnification using ultraviolent light and a fluorescence microscope. Desmids range in size from under 10 microns—

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Series of four photos that show the same reef in 1971, 1988, 1998, and 2004.
December 31, 2017

Time series of Grecian Rocks coral reef

Time series of the coral reef at Grecian Rocks (Key Largo, FL) illustrating an example of the dramatic decline in live coral on Florida Keys reefs in recent decades. From Shinn and Kuffner (2017).

Three panels. Left: overhead view of ocean and breakers. Middle and right: Seafloor maps: dark blue deep, light blue shallow.
December 31, 2017

Estimated and measured bathymetry offshore of Madeira Beach, Florida

Estimated and measured ocean depths (bathymetry) from Madeira Beach, Florida. Each panel shows same geographic area. m = meters. Left: Snapshot transformed from original oblique camera view to overhead “map” view. Middle: Bathymetry estimated by applying cBathy algorithm to July 2017 video imagery. Right: Bathymetry measured with sonar in February 2017. Despite being based

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Low dunes near Cape Canaveral launch pads 39A and 39B often overwash during storm events
December 31, 2017

Low dunes near Cape Canaveral launch pads often overwash during storms

Low dunes near Cape Canaveral launch pads 39A and 39B often overwash during storm events, transporting sand landward. Critical infrastructure may be buried or flooded. In addition, significant landward transport of sand may lead to extensive shoreline erosion.

UV light makes a desmid alga show up in red, yellow and purple
December 15, 2017

Ultraviolet light gives desmid alga cell a bright red glow

 

Illuminated with ultraviolet light, this living desmid cell has a bright red chloroplast. USGS biologist Barry H. Rosen, an expert on aquatic microorganisms, takes exquisite microscopic photos as part of his study of these single-celled green algae, which he has collected in a nearly pristine area of the northern Everglades. This cell got smooshed (the technical

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November 24, 2017

Serene Sirens: USGS Sea Cow Science

A USGS video about manatees reveals that while the animals may act like the cows of the sea, they also have more than a bit of the magical siren or mermaid about them.  Go for a serene swim.

September 30, 2017

USGS Hurricane Preparedness

Before a hurricane, USGS Scientists undertake a data collection effort of a grand scale. They install a temporary mobile network of sensors along the coasts to collect additional data on the intensity of storm surge, one of the most dangerous elements of a hurricane. This effort provides critical information that allows various USGS partners and emergency responders to

September 29, 2017

Image of the Week - Puerto Rico after Hurricane Maria

Landsat 8 imagery shows the change in vegetation on Puerto Rico after Hurricane Maria.

At the USGS EROS Center, we study land change, operate the Landsat satellites, and maintain the longest, continuously acquired collection of images of the Earth's land surface.

USGS EROS Center (https://eros.usgs.gov/)

September 19, 2017

Image of the Week - Irma Churns Up Sediment in the Florida Keys

Hurricane Irma churned up sediment around the Florida keys as shown by these Landsat images.

At the USGS EROS Center, we study land change, operate the Landsat satellites, and maintain the longest, continuously acquired collection of images of the Earth's land surface.

USGS EROS Center (https://eros.usgs.gov/

Satellite image showing the damage from Irma on the Florida Keys.
September 14, 2017

Irma Churns Up Sediment in the Florida Keys

Hurricane Irma crossed the Florida Keys the morning of September 10, 2017, as a Category 4 hurricane with winds of 130 miles per hour. Besides damage done to structures on the islands, the storm also stirred the waters.

A natural color Landsat image acquired four days after the storm contrasts with an image

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Flooding on Atlantic Avenue in Garden City, SC
September 11, 2017

Flooding on Atlantic Avenue in Garden City, SC

That photo is of Atlantic Avenue in Garden City, South Carolina on September 11.

Photomicrograph of a green desmid alga resembling a holiday ornament
August 31, 2017

A natural marvel in a single cell

This single-celled freshwater algae wasa collected as part of the first-ever study of the green algae family called desmids in Florida’s Loxahatchee National Wildlife Refuge, in the northern Everglades. USGS biologist Barry H. Rosen, an expert on freshwater algae who leads the study, used a technique called differential interference microscopy to highlight the relief of

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Filter Total Items: 399
USGS
April 16, 2015

New genetic data suggest the red lionfish invasion in the Caribbean Basin and Western Atlantic started in multiple locations, not just one as previously believed, according to a new study led by the U.S. Geological Survey.

USGS
March 25, 2015

The U.S. Geological Survey’s Southeast Ecological Science Center in Gainesville and the National Wetlands Research Center in Lafayette, Louisiana will merge under the same leadership effective October 1, 2015.

USGS
March 25, 2015

Some shallow-groundwater wells next to or downhill from Orange County agricultural fields treated with bio-based fertilizers have nitrate levels above Environmental Protection Agency standards set for public water supplies, according to a new U.S. Geological Survey report. 

collage of scientists conducting science related to each mission are
March 25, 2015

Appalachian coal and petroleum resources are still available in sufficient quantities to contribute significantly to fulfilling the nation’s energy needs, according to a recent study by the U.S. Geological Survey.

USGS science for a changing world logo
March 20, 2015

GAINESVILLE, Fla. – – Nearly 80 percent of radio-tracked marsh rabbits that died in Everglades National Park in a recent study were eaten by Burmese pythons, according to a new publication by University of Florida and U.S. Geological Survey researchers.

Image: Kelp Greenling Among Seafloor Cover of Mixed Composition
March 18, 2015

Thousands of photos and videos of the seafloor and coastline—most areas never seen before—are now available and easily accessible online. This is critical for coastal managers to make important decisions, ranging from protecting habitats to understanding hazards and managing land use.

USGS
March 12, 2015

Vital coastal storm-tide information needed to help guide storm response efforts following major storms affecting North Carolina will be more accessible than ever due to a new monitoring network the U.S. Geological Survey is currently building.

USGS
February 24, 2015

The first section of a seepage barrier designed to prevent catastrophic failure of the 143-mile Herbert Hoover Dike around Lake Okeechobee, Florida may have unintentionally caused changes in the salinity of portions of the shallow aquifer near the lake, according to a new U.S. Geological Survey report.

USGS
December 18, 2014

Secretary of the Interior Sally Jewell announced today that Interior’s Southeast Climate Science Center is awarding nearly $150,000 to its host university and other partners for research to guide managers of parks, refuges and other cultural and natural resources in planning how to help species and ecosystems adapt to climate change.

Follow Region 2 activities on social media, get contact information for Region 2 USGS centers, and meet Region 2's staff and center directors. 

Filter Total Items: 283