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Daylight and fluorescent images of a Montastrea caverno

Daylight and fluorescent images of a Montastrea cavernosa coral colony growing on the seawall at Ft. Jefferson, Dry Tortugas National Park. The brownish color of the coral in daylight is largely attributable to chlorophyll contained within the symbiotic algae harbored by the coral. The fluorescent image was taken at night using blue LED lights to stimulate

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Image of the front page of Sound Waves, July - Aug. 2012
March 22, 2019

Sound Waves, July - Aug. 2012

The stories in the July - Aug. 2012 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2012/08/

USGS Scientists Study an Oil-Spill-Mitigation Sand Berm in the Chandeleur Islands, Louisiana 

Collecting Ocean-

Daylight and fluorescent images of two coral colonies

Daylight and fluorescent images of two coral colonies, Diploria clivosa (left) and Orbicella faveolata (right) growing on the seawall at Ft. Jefferson, Dry Tortugas National Park. The two colonies are separated by an area of dead coral that has been colonized by algae. In the fluorescent image, red corresponds to chlorophyll and green to GFP. Note that

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St. Johns River WMD water-use 1975-2010 Image
May 8, 2019

St. Johns River WMD water-use 1975-2010

St. Johns River WMD water-use 1975-2010 (Click on icon above to save file)

Image: Collection Of Sediment And Water Sampling Prior To The Possible Occurrence Of Oil Contamination From The Deepwater Horizon Oil Well At Egmont Key, Florida

Collection Of Sediment And Water Sampling Prior To The Possible Occurrence Of Oil Contamination From The Deepwater Horizon Oil Well At Egmont Key, Florida

Bruce Bernard (left) and Scott McBride (right) obtain water and sediment samples at Egmont Key which is about 1 mile west of the mouth of Tampa Bay in the Gulf of Mexico. Samples were collected June 14, 2010 prior to the possible occurrence of oil contamination from the Deepwater Horizon's oil well.

Image of the front page of Sound Waves, May - June 2012
March 22, 2019

Sound Waves, May - June 2012

The stories in the May - June 2012 issue of Sound Waves:

https://archive.usgs.gov/archive/sites/soundwaves.usgs.gov/2012/06/

Gas Hydrates and Climate Warming—Why a Methane Catastrophe Is Unlikely 

Real-Time Mapping of Seawater and Atmospheric

Daylight and fluorescent images of a Orbicella faveolata

Daylight and fluorescen images of a Orbicella faveolata coral colony in Dry Tortugas National Park. In this colony, the GFP fluorescence is so intense that it overwhelms the weaker red fluorescence of chlorophyll. 

Image: A Manatee in Florida

A Manatee in Florida

USGS conducts long-term, detailed studies on the life history, population dynamics, and ecological requirements of the West Indian manatee. Federally listed as endangered, the manatee is a large, gentle, plant-eating, and slow-moving marine mammal.