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Elizabeth Chamberlain extracts a sample from a light-proof sampling device for optical dating.
Thanks to wetland loss, Louisiana Highway 1 along Bayou Lafourche abruptly ends in open water.
An eroding Mississippi Delta: How quickly is it washing away? Scientists have new answers.
The Mississippi Delta today, shrinking as sea level rises and sand grains are carried away.
Lesina Lagoon, Italy, where scientists are studying living, dead and fossil clams and parasites.
Paleoecologists collect live clams in a lagoon near Cervia, Italy.
Lesina Lagoon at sunset, its muck-covered bottom obscured in the dusk.
A lagoon near Cervia, Italy, a field work site for the scientists' parasite research.
The larval stage of a parasite in its host clam, Abra segmentum.
Encysted parasite larvae in their host clam, Abra segmentum.
The research included salmon in rivers like the Shasta in northern California.
A male sockeye salmon rests in the shallows of Scotch Creek in British Columbia.
A female pink salmon in South Prairie Creek, Washington, builds a redd by excavating sediment.
Researchers measured conditions in Scotch Creek, British Columbia, home to sockeye salmon.
A grid was placed in South Prairie Creek, Washington, to study spawning and sediment grain size.
NSF Critical Zone Observatory scientists studied rivers and salmon species such as pink salmon.
Acoff hosted faculty from 82 of the nationís 101 HBCUs and predominantly black institutions.