Images

Emergency shelter camp for thirty families erected at the site of a former village.

A scuba diver enters the water to complete an underwater survey.

Greg Linder, USGS Columbia Environmental Research Center, instructs Emily Simpson, Bethel College undergraduate student, on the dissection of a pocket gopher.

Agricultural Stream in Indiana

Sean Shea loads the PIT tag onto a syringe.

Lake sturgeon collected on restored spawning grounds in the lower St. Clair River.

A research biologist conducting surgery on a lake sturgeon to implant an acoustic telemetry transmitter.

A communications associate holding a lake sturgeon collected on restored spawning grounds in the lower St. Clair River.

Ernie Valdez, USGS Fort Collins Science Center, examines a bat caught over the mine detention pond.

Flood waters of the Missouri River and its tributaries cause road closures.

This ledge outcrop serves as the control at the USGS station on the Mousam River near West Kennebunk, Maine.

Woody debris is picked up and carried downstream by the rising waters of the Missouri River in Jefferson City, Missouri.

Two Centrarchid larvae sampled in the Missouri River near Plattsmouth.

Two Centrarchid larvae and one Catostomid larvae sampled in the Missouri River near Plattsmouth.

Three Hiodontid eggs, one Hiodontid larvae, and one Catostomid larvae sampled in the Missouri River near Plattsmouth. 

Hydrologic Technician Denis Scanlon removes a Pankow sampler from Lincoln Creek, in Milwaukee, Wisconsin, as USGS Hydrologist Dave Saad assists. High waters make the job particularly challenging.

Collection of a suspended-sediment sample by hydrologic technicians at U.S. Geological Survey station 08185000 Cibolo Creek at Selma, Texas, on May 25, 2013.

The quality of pallid sturgeon eggs is verified under the microscope prior to fertilization. 

As schools close for the year and summer weather beckons, many recreationalists head to the Great Lakes' public beaches. However, these coastal areas can become contaminated with disease-causing bacteria that threaten public health, disrupt water recreation, and pay a toll on the Great Lakes economies that depend on summer tourism.

Fertilized pallid sturgeon eggs become sticky and adhere to gravel substrate.  

Fertilized pallid sturgeon eggs are gently dispersed over the gravel substrate.  The PVC pipes are used to support a canopy of shade cloth to more closely mimic the muddy depths of the Missouri River.