Images

USGS collaborator Scott Saleska (University of Arizona) and other team members install a remote sensing instrument near the top of a 213-foot (65-meter) tower at the Amazon forest study site near Santarém, Brazil.    Data from the sensor system are being used by Saleska, USGS Geographer Dennis Dye and their U.S., Brazilian and Australian collaborators

Sensors installed on this 213-foot (65-meter) tower  near Santarém, Brazil are used by USGS Geographer Dennis Dye and his U.S., Brazilian and Australian collaborators to investigate how seasonal variations in climate affects photosynthesis and the uptake of atmospheric carbon dioxide by tropical forests.

Sensors installed on this 213-foot (65-meter) tower  near Santarém, Brazil are used by USGS Geographer Dennis Dye and his U.S., Brazilian and Australian collaborators to improve understanding of how seasonal variations in climate affects photosynthesis and the uptake of atmospheric carbon dioxide by tropical forests.

USGS collaborator Jin Wu (University of Arizona) prepares a remote sensing instrument for installation near the top of a 213-foot (65-meter) tower at the Amazon forest study site near Santarém, Brazil. The sensor system is being used to improve understanding of how photosynthesis in tropical forests responds to seasonal variations in climate.

USGS collaborator Scott Saleska (University of Arizona) works with research team members to prepare a remote sensing instrument for installation near the top of a 213-foot (65-meter) tower at the Amazon forest study site near Santarém, Brazil.  Data from the sensor system are being used by Saleska, USGS Geographer Dennis Dye and their U.S., Brazilian and Austra

USGS collaborator Scott Saleska (University of Arizona) makes adjustments to a remote sensing system before installation near the top of a 213-foot (65-meter) tower at the Amazon forest study site near Santarém, Brazil.    Data from the system are being used by Saleska, USGS Geographer Dennis Dye and their U.S., Brazilian and Australian collaborators

USGS collaborator Scott Saleska (University of Arizona) prepares to climb a 213-foot (65-meter) tower at the Amazon forest study site near Santarém, Brazil.  Saleska and other team members installed a remote sensing system near the top of the tower as part of an investigation to improve understanding of how photosynthesis in tropical forests responds to seasona

Sampling Lafferty Gulch surface water that was analyzed for perchlorate and metals on July 10, 2012. Water-quality sampling of groundwater and surface water was conducted during 2011-15 at Mount Rushmore National Memorial to characterize the occurrent of perchlorate and selected metals commonly associated with fireworks.

USGS scientists take samples of Lafferty Gulch surface water, which was analyzed for perchlorate and metals.

A green sea turtle, sporting a USGS satellite tag, swims the waters of Dry Tortugas National Park, Florida, USA. Note: All marine turtle images taken in Florida were obtained with the approval of the U.S. Fish & Wildlife Service (USFWS) and the Florida Fish & Wildlife Conservation Commission (FWC) under conditions not harmful to this or other turtles.

A Pacific Chorus frog (Pseudacris regilla) in a meadow located in Yosemite National Park.

USGS scientists examine a Double-crested Cormorant (Phalacrocorax auritus) and measure the length of its wing chord.

Low-lying, salt-tolerant goose grazing lawn in foreground, giving way to higher elevation, salt-intolerant tundra in background.  Geese require vegetation that is higher in quality and lower in biomass than caribou.

USGS scientists examine a Double-crested Cormorant (Phalacrocorax auritus) and measure the length of its tarsus.

USGS scientists examine a Double-crested Cormorant (Phalacrocorax auritus) and measure the length of its wing chord. 

USGS scientists from the National Wildlife Health Center respond to wildlife disease events in the field.

Burned trees along the trail into Hummingbird Saddle, Gila National Forest, New Mexico, where USGS scientists installed a rain gage.

USGS scientist finishes the installation of a rain gage at Hummingbird Saddle, Gila National Forest, New Mexico.

Aerial view of the Gila Wilderness Area on the approach to Mogollon Baldy Lookout, where USGS scientists installed a rain gage to provide advance flood warning, Gila National Forest, New Mexico.

Larval samples collected near the confluence of the Missouri and Mississippi Rivers.

Sturgeon larva captured near the confluence of the Missouri and Mississippi Rivers.