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Becky Gast holds the core cylinder as Bill Boyd drives it into the sand.

Becky Gast holds the core cylinder as Bill Boyd drives it into the sand.
Becky Gast holds the core cylinder as Bill Boyd drives it into the sand.
Becky Gast holds the core cylinder as Bill Boyd drives it into the sand.
Becky Gast holds the core cylinder as Bill Boyd drives it into the sand.
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Elgar, Steve
Becky Gast holds the core cylinder as Bill Boyd drives it into the sand.
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09/09/2010
becky-bab-levi.jpg
Image of The Day caption:
WHOI biologist Rebecca Gast steadies a coring tube as Bill Boyd, a senior engineer at Scripps Institution of Oceanography, drives it into the sand at Duck, North Carolina, while WHOI research associate Levi Gorrell looks on. After taking meter-long cores from several locations on the beach, Gast analyzed samples from different depths in each core for the presence of bacterial DNA. Working with WHOI physical oceanographers Steve Elgar and Britt Raubenheimer, she found that when sand moveswhether carried by tides, winds, or wavesit carries bacterial DNA with it. Their work suggests natural reshaping of a beach can redistribute microbes in the sand, including the indicator bacteria that lead to beach closures.
Caption from Oceanus magazine, vol. 49, no. 2, page 25:
WHOI biologist Rebecca Gast steadies a coring tube as Bill Boyd, a senior engineer at Scripps Institution of Oceanography, drives it into the sand. WHOI research associate Levi Gorrell looks on. Each tube collected a core of sand about 100 centimeters long. Gast analyzed samples from different depths in each tube for the presence of bacterial DNA.
Photo by Steve Elgar
© Woods Hole Oceanographic Institution
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