Images

An invasive species, the spiny water flea, is likely a primary driver of changes in Lake Huron's food web over the past decade.

Photo of fossil algae (dinocyst). Specimen is about 90 micrometers across.The largest known impact crater in the U.S. lies buried beneath the Virginia Coastal Plain.

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 U.S.

The U.S.

This image shows an Upper Mississippi River marina covered by excessive duckweed.

A photomicrograph depicting the calcium carbonate tests of ten species of marine foraminiferans. Upon death, their tests can form calcareous marine sediments known as foraminiferan ooze.

A photomicrograph depicting the calcium carbonate tests of ten species of marine foraminiferans. The image has been inverted to bring out details. Upon death, their tests can form calcareous marine sediments known as foraminiferan ooze.

A photomicrograph depicting the siliceous tests of ten species of marine radiolarians. Upon death, their tests can form siliceous marine sediments known as radiolarian ooze.

A photomicrograph depicting the siliceous tests of ten species of marine radiolarians. This image has been inverted to bring out details. Upon death, their tests can form siliceous marine sediments known as radiolarian ooze.

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.

A photomicrograph depicting the siliceous frustules of fifty species of diatoms arranged within a circular shape. The image has been inverted to white on black to bring out details. Diatoms form the base of many marine and aquatic foodchains and upon death, their glassy frustules form sediments known as diatomaceous earth.

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

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

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

The kerchief over the bear's eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized.

Researchers with IGBST measure the bear's girth as part of body fitness data collection.

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.

Researchers with IGBST have tranquilized the bear and prepare to lift it out of the trap and onto the tarp for data collection. Once on the tarp the bear is easier to move.