Science and Products
We use remote-sensing technologies—such as aerial photography, satellite imagery, and lidar (laser-based surveying)—to measure coastal change along U.S. shorelines.
Both ATRIS configurations was deployed in Dry Tortugas National Park (DRTO) to fill information gaps in the spatial coverage of existing habitat maps.
The specific objectives of this project are to identify and describe the processes that are important in determining rates of coral-reef construction. How quickly the skeletons of calcifying organisms accumulate to form massive barrier-reef structure is determined by processes of both construction (how fast organisms grow and reproduce) and destruction (how fast reefs break down by mechanical...
ATRIS is a benthic-survey tool that simultaneously acquires geo-located, color, digital images with corresponding water depths.
This project focused on developing algorithms for quantifying benthic habitat complexity from images, modeling the structural complexity of the seafloor, and using fluorescence signatures to classify coral reef habitats.
Hydrodynamics and sediment mobility processes over a degraded senile coral reef
Coral reefs can influence hydrodynamics and morphodynamics by dissipating and refracting incident wave energy, modifying circulation patterns, and altering sediment transport pathways. In this study, the sediment and hydrodynamic response of a senile (dead) barrier reef (Crocker Reef, located in the upper portion of the Florida Reef Tract) to...Torres-Garcia, Legna M.; Dalyander, P. Soupy; Long, Joseph W.; Zawada, David G.; Yates, Kimberly K.; Moore, Christopher; Olabarrieta, Maitane
Divergence of seafloor elevation and sea level rise in coral reef ecosystems
Coral reefs serve as natural barriers that protect adjacent shorelines from coastal hazards such as storms, waves, and erosion. Projections indicate global degradation of coral reefs due to anthropogenic impacts and climate change will cause a transition to net erosion by mid-century. Here, we provide a comprehensive assessment of the combined...Yates, Kimberly K.; Zawada, David G.; Smiley, Nathan A.; Tiling-Range, Ginger
Seafloor elevation change in Maui, St. Croix, St. Thomas, and the Florida Keys
The U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted research to quantify the combined effect of all constructive and destructive processes on modern coral reef ecosystems by measuring regional-scale changes in seafloor elevation. USGS staff assessed five coral reef ecosystems in the Atlantic Ocean (Upper...Yates, Kimberly K.; Zawada, David G.; Smiley, Nathan A.; Range, Ginger; Resnick, Jessica
ATRIS Seafloor Images – West Turtle Shoal Patch Reef, Rawa Patch Reef, Dustan Rocks Patch Reef, and Thor Patch Reef, Florida, 2011
The U.S. Geological Survey St. Petersburg Coastal and Marine Science Center developed the Along-Track Reef Imaging System (ATRIS) in order to capture high-resolution, geo-located images of the seafloor. The images in this data release were collected September 29-30, 2011 at West Turtle Shoal, Rawa, Dustan Rocks, and Thor patch reefs near Marathon...Zawada, David G.; Ruzicka, Rob; Colella, Michael A.; Resnick, Jessica
Distribution of benthic habitats at Crocker Reef, Florida, 2014
The distribution of benthic habitats for a 1-km x 1-km area around Crocker Reef in the Florida Key is based upon underwater digital images of the seafloor collected June 24-25, 2014. The imagery was collected using the USGS shallow Along-Track Reef Imaging System (sATRIS), a boat-based, pole-mounted sensor package for mapping shallow-water benthic...Zawada, David G.; Netchy, Kristin; Resnick, Jessica
Distribution of sediments at Crocker Reef, Florida, 2013-2014
Understanding the processes that govern whether a coral reef is accreting (growing) or dissolving are fundamental to questions of reef health and resiliency. The Reefscape Characterization task of the Coral Reef Ecosystem Studies (CREST) project is focused on geochemical, geologic, and metabolic processes that affect carbonate precipitation and...Zawada, David G.; Yates, Kimberly K.; Moore, Christopher; McLaughlin, Molly R.; Resnick, Jessica P.
ATRIS seafloor images – Crocker Reef, Florida, 2014
Underwater digital images, single-beam bathymetry, and global positioning system (GPS) data were collected June 24-25, 2014 within a 1-km x 1-km area around Crocker Reef in the Florida Keys, USA. A total of 91,206 images of the seafloor and water column were collected along pre-defined transect lines and organized into 3 sets: track1, track2, and...Zawada, David G.; Thornton, Lance; Thompson, Philip R.; Resnick, Jessica
EAARL-B Submerged Topography—Crocker Reef, Florida, 2014
These datasets provide lidar-derived topography for a portion of the submerged environs of Crocker Reef, Florida. Elevation measurements were acquired on April 13 and 22, 2014 by the second-generation Experimental Advanced Airborne Research Lidar (EAARL-B).The authors acknowledge Emily Klipp, Richard Mitchell, Karen Morgan, Chris Pali, Virgil...Fredericks, Xan; Kranenburg, Christine J.; Nagle, David B.; Zawada, David G.
EAARL Coastal Topography–Dauphin Island, 2010
These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provide lidar-derived first-surface and bare-earth topography for Dauphin Island, Alabama. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) on July 24, 2010, one day before remnants from the...Kranenburg, Christine J.; Long, Joseph W.; Zawada, David G.
EAARL Coastal Topography—Dauphin Island, Post-Hurricane Katrina, 2005
These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provide lidar-derived first-surface and bare-earth topography for Dauphin Island, Alabama. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) during September 2005, immediately following Hurricane...Kranenburg, Christine J.; Long, Joseph W.; Zawada, David G.
Breeding loggerhead marine turtles Caretta caretta in Dry Tortugas National Park, USA, show high fidelity to diverse habitats near nesting beaches
We used satellite telemetry to identify in-water habitat used by individuals in the smallest North-west Atlantic subpopulation of adult nesting loggerhead turtles Caretta caretta during the breeding season. During 2010, 2011 and 2012 breeding periods, a total of 20 adult females used habitats proximal to nesting beaches with various...Hart, Kristen M.; Zawada, David G.; Sartain-Iverson, Autumn R.; Fujisaki, Ikuko
Investigación del USGS sobre el ecosistema de arrecifes de coral en el Atlántico
Información General Los arrecifes de coral son estructuras sólidas, biomineralizadas que protegen comunidades costeras actuando como barreras protectoras de peligros tales como los huracanes y los tsunamis. Estos proveen arena a las playas a través de procesos naturales de erosión, fomentan la industria del turismo, las...Kuffner, Ilsa B.; Yates, Kimberly K.; Zawada, David G.; Richey, Julie N.; Kellogg, Christina A.; Toth, Lauren T.; Torres-Garcia, Legna M.