Images

Photomicrograph depicting the siliceous frustules of fifty species of diatoms arranged within a circular shape. Diatoms form the base of many marine and aquatic food chains and upon death, their glassy frustules form sediments known as diatomaceous earth.

Photomicrograph depicting the siliceous frustulesof fifty species of diatoms arranged within a circular shape. Diatoms form the base of many marine and aquatic food chains and upon death, their glassy frustules form sediments known as diatomaceous earth.

The grey, coiled seashell of Olivella semistriata with the aperture (shell opening) facing up. Photograph taken 2002 or earlier.

A pair of Caracolus sagemon.

Colorful and coiled seashells of Olivella semistriata with the apertures (shell openings) facing up. Photograph taken 2002 or earlier.

The U.S.

Herring larvae 53 day post-hatch. Black pigmentation is evident.

Naturally-deposited herring eggs attached to submerged macrophytes. Coiled embryos are evident inside the eggs.

Small herring spawning event in Puget Sound, evidenced by the presence of 'white water', caused by mass release of spawning products into the water.

These live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.

The orange, coiled seashell of Olivella semistriata with the aperture (shell opening) facing up. Photograph taken 2002 or earlier.

During laboratory tests, USGS Upper Midwest Environmental Sciences Center scientists and partners found that the heart and growth rates of some species of young freshwater mussels declined as a result of elevated water temperatures, and many died.

Back-lit photographs of wings of White-nose Syndrome (WNS)-positive little brown bats, one with subtle circular and irregular pale areas (arrows) indicating areas of fungal infection (A) and another bat (B) with areas of relatively normal tone and elasticity (black arrow), compared to a WNS affected area that looks like crumpled tissue paper with loss of elasticity,

Hibernating little brown bat with white muzzle typical of White-nose syndrome.

Suzanne Nicholson, USGS, collecting soil at one of the sites in New Jersey, on the coast of the Atlantic Ocean just south of Atlantic City.

The ice froze around the fence post, the stage in the river went up, then the river froze again, creating a large gage height correction - Heart River near Richardton, North Dakota.

Team of scientists working together to insert a tracking device in a 14 foot Burmese python.

Herring larvae 15 days post-hatch. Food in the gut appears orange.

Currently four age classes (0, 1, 2, and 4 year olds) of SPF herring are maintained at the Marrowstone Marine Field Station.

Once a bear is radio collared, researchers can track its movements with telemetry.

When looking for a place to set up a trapping location, scientists look for existing bear sign such as scratches on trees and bear scat. Sometimes traps are set in areas that have no obvious bear sign to determine if indeed bears are present.