Images

A blood sample is collected from every pallid sturgeon that is implanted with a telemetry transmitter. 

Researchers are deploying an underwater microscope (or "sand-cam") from the R/V Theodore H. Schmudde.

Two Cladonia lichen species, C. stellaris and C. rangiferina are pictured here among some blueberry plants in Newfoundland.  Lichens -- which are often mistaken for moss -- are unusual plant-like organisms that are actually symbioses of fungi, algae and bacteria living together.

Equipped with a multibeam bathymetric system and acoustic Doppler current profiler, the research vessel Lucien Brush was deployed to make comprehensive maps of the potential spawning area.  In order to collect precise location data, a base station is set-up within view of the area to be mapped.  Luckily, a sandbar was still peaking above the river’s surfac

Specialized, directional, underwater microphones, or hydrophones are lowered into the water to “hear” acoustic tags implanted in pallid sturgeon.

Amy George uses a microscope and imaging software to measure larval Acipenseriformes collected in the Missouri River. 

A stream off of the Tamiami Trail in the Everglades.

A calm canal flows intensely over the weir into the churning pool below.

Scientists build a boardwalk to access mangrove forest to sample fish.

Scientists inspect a raised boardwalk used to access a mangrove forest to sample fish.

Scientist at work downloading data from a HOBO weather station. 

USGS and NPS personnel placed a GPS-transmitter on a California Condor at Pinnacles National Monument.  Photo was taken when the bird was released after attaching the transmitter.

Employee uses a Flowtracker to measure cross-sectional profile of a rivulet draining a mangrove forest.

Scientist raised the engine to navigate a tidal creek at low tide.  Note freeze damage to mangroves in the background.

Radio tracking adult Chinook and steelhead on the Klickitat River in the fall.

Upstream view at the Cougar Dam lookout point on a cold winter morning.

Just finished lampara seining during the daylight now moving into evening seining.

This Chinook was tagged and then released back into the Klickitat River where we tracked its movements up and down the river.

Annual alligator nesting surveys in south Florida provide valuable information about water deliveries and sea level rise, as salinity intrusion or unnatural inflows decrease nesting success.

While the immediate hazards of volcanoes are known, some areas become destabilized by drained, underground lava tubes and collapse years later.

Decreased snow melt limits water levels in one of the west’s most vital reservoirs.