Scientists used a core from this Massive Starlet (Siderastrea siderea) coral colony in Dry Tortugas National Park to reconstruct ocean temperatures going back to 1837. Photo: USGS
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Massive Starlet coral at Dry Tortugas National Park
Scientists used a core from this Massive Starlet (Siderastrea siderea) coral colony in Dry Tortugas National Park to reconstruct ocean temperatures going back to 1837. Photo: USGS
Diver with a Massive Starlet coral, Dry Tortugas National Park
A USGS diver beside a Massive Starlet (Siderastrea siderea) coral colony in Dry Tortugas National Park. Scientists used a core from this coral to reconstruct ocean temperatures going back to 1837. Photo: USGS, May 2012
A USGS diver beside a Massive Starlet (Siderastrea siderea) coral colony in Dry Tortugas National Park. Scientists used a core from this coral to reconstruct ocean temperatures going back to 1837. Photo: USGS, May 2012
Pitcher plant Sarracenia purpurea
Pitcher plant, Sarracenia purpurea leaves filled with water in a bog in northern Florida.
Pitcher plant, Sarracenia purpurea leaves filled with water in a bog in northern Florida.
Waterfall in Appalachian Forest
Waterfall in Appalachian Forest
Waterfall in Appalachian Forest
Burmese Python Swimming in Florida Bay
Fishing guide Camp Walker, Catalyst Charters, of Islamorada, Fla., took this photo of a Burmese python swimming in Florida Bay from the end of Twisty Channel toward End Key on Nov. 16, 2011.
Fishing guide Camp Walker, Catalyst Charters, of Islamorada, Fla., took this photo of a Burmese python swimming in Florida Bay from the end of Twisty Channel toward End Key on Nov. 16, 2011.
Outer Banks in South Carolina, November 2011
Picture of the Outer Banks in South Carolina, November 2011
Picture of the Outer Banks in South Carolina, November 2011
Outer Banks in South Carolina, November 2011
The sun begins to set through the trees within the Outer Banks, South Carolina (November 2011).
The sun begins to set through the trees within the Outer Banks, South Carolina (November 2011).
Outer Banks in South Carolina, November 2011
Picture of the Outer Banks in late fall (South Carolina, 2011)
Picture of the Outer Banks in late fall (South Carolina, 2011)
Outer Banks in South Carolina, November 2011
Picture of the Outer Banks in late fall (South Carolina, 2011)
Picture of the Outer Banks in late fall (South Carolina, 2011)
Oblique aerial photograph near Rodanthe, North Carolina, Aug. 30, 2011
Oblique aerial photograph near Rodanthe, North Carolina, looking south along the coast on August 30, 2011, three days after landfall of Hurricane Irene.
Oblique aerial photograph near Rodanthe, North Carolina, looking south along the coast on August 30, 2011, three days after landfall of Hurricane Irene.
Flint River Below Georgia Power Dam
Flint River Below Georgia Power Dam.
Flint River Below Georgia Power Dam.
Measuring discharge during May 2011 Memphis, Tennessee flood
Measuring discharge during May 2011 Memphis, Tennessee flood
Measuring discharge during May 2011 Memphis, Tennessee flood
USGS boat crew prepares for a discharge measurement
USGS boat crew prepares for a discharge measurement during May 2011 Memphis, Tennessee flooding
USGS boat crew prepares for a discharge measurement during May 2011 Memphis, Tennessee flooding
Mangrove forest, Shark River Slough, Everglades National Park
Tangled web of prop roots from red mangrove trees, intermixed with black mangroves and white mangroves farther back in the forest. Mangrove forests cover much of the southwestern coastal region of Everglades National Park. The red mangroves are the most salinity tolerant and grow with their prop roots in the water or within the range of high tide.
Tangled web of prop roots from red mangrove trees, intermixed with black mangroves and white mangroves farther back in the forest. Mangrove forests cover much of the southwestern coastal region of Everglades National Park. The red mangroves are the most salinity tolerant and grow with their prop roots in the water or within the range of high tide.
Spring water is usually clear and cool, which attracts swimmers.
Rainbow Springs, Florida, USA
Florida Everglades
Florida Everglades
Bleaching colony of elliptical star coral, Dichocoenia stokesii
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of elliptical star coral, Dichocoenia stokesii
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of symmetrical brain coral, Diploria strigosa
Bleaching colony of symmetrical brain coral, Diploria strigosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of symmetrical brain coral, Diploria strigosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of lobed star coral, Montastraea annularis
Bleaching colony of lobed star coral, Montastraea annularis, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of lobed star coral, Montastraea annularis, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of great star coral, Montastraea cavernosa
Bleaching colony of great star coral, Montastraea cavernosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of great star coral, Montastraea cavernosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.