Storm clouds over the Missouri River.
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Storm Clouds over Missouri River
Storm clouds over the Missouri River.
Brackish Marsh in the Mississippi River Delta
A brackish marsh in the Mississippi River Delta.
A brackish marsh in the Mississippi River Delta.
A Lichen in Maine
This lichen, Lobaria pulmonaria, is found in northern North America, where it is becoming rare in places. Lichens -- which are often mistaken for moss -- are unusual plant-like organisms that are actually symbioses of fungi, algae and bacteria living together.
This lichen, Lobaria pulmonaria, is found in northern North America, where it is becoming rare in places. Lichens -- which are often mistaken for moss -- are unusual plant-like organisms that are actually symbioses of fungi, algae and bacteria living together.
Larval Sampling
Weighted, small mesh nets (left and right side of the boat attached to winches) are lowered to the bottom of the river near potential spawning sites. After a set period of time, the nets are raised and the contents are hand-picked for any Acipenseriformes (sturgeon and paddlefish) larvae. Samples are preserved for laboratory identification and genetic an
Weighted, small mesh nets (left and right side of the boat attached to winches) are lowered to the bottom of the river near potential spawning sites. After a set period of time, the nets are raised and the contents are hand-picked for any Acipenseriformes (sturgeon and paddlefish) larvae. Samples are preserved for laboratory identification and genetic an
Performing Double Duty
Performing double duties of tracking and collecting acoustic images, Chad Vishy operates one of his three computers and five screens necessary to simultaneously collect this variety of data.
Performing double duties of tracking and collecting acoustic images, Chad Vishy operates one of his three computers and five screens necessary to simultaneously collect this variety of data.
Research Vessel Lowering a Sand Cam
Research vessel Theodore R. Schmudde anchors in the swift water before lowering the sand cam (metal object suspended to the pulleys at the front of the boat).
Research vessel Theodore R. Schmudde anchors in the swift water before lowering the sand cam (metal object suspended to the pulleys at the front of the boat).
Tandem Tracking
Biologists prepare to tandem track a flooded Missouri River in search of telemetered Pallid Sturgeon.
Biologists prepare to tandem track a flooded Missouri River in search of telemetered Pallid Sturgeon.
Canal Dredging
Dredging the entrance canal to the Caloosahatcee River in Moore Haven, FL.
Dredging the entrance canal to the Caloosahatcee River in Moore Haven, FL.
Implanting Telemetry Tag in Pallid Sturgeon
Acoustic telemetry tags have to be fairly small to fit inside a five to fifteen pound pallid sturgeon. The average tag is about the size of your ring finger (60-90 mm long and 16 mm diameter). That means the battery that powers the acoustic tag is small, too. A small battery means that the signal from the tag is relatively weak, or fairly quiet.
Acoustic telemetry tags have to be fairly small to fit inside a five to fifteen pound pallid sturgeon. The average tag is about the size of your ring finger (60-90 mm long and 16 mm diameter). That means the battery that powers the acoustic tag is small, too. A small battery means that the signal from the tag is relatively weak, or fairly quiet.
Lizard at USGS Meteorogical Station
Photo taken on top of Meteorogical station in El Yunque Forest.
Photo taken on top of Meteorogical station in El Yunque Forest.
Waterfall at Lago Icacos Damsite
Photo taken from above the Lago Icacos Damsite.
Photo taken from above the Lago Icacos Damsite.
Yellowstone Tracking Boat
A radio tracking boat cruises down a flooded Yellowstone River in search of telemetered pallid sturgeon.
A radio tracking boat cruises down a flooded Yellowstone River in search of telemetered pallid sturgeon.
Juvenile tarpon
Scientist displays juvenile tarpon captured in a tidal pond.
Scientist displays juvenile tarpon captured in a tidal pond.
Scientists Collecting Field Data
Alicia Torregrosa is downloading data from a phenocam on BLM land in Idaho.
Alicia Torregrosa is downloading data from a phenocam on BLM land in Idaho.
Arenal Volcano
Arenal Volcano is surrounded by inhabitants despite being extremely active.
Arenal Volcano is surrounded by inhabitants despite being extremely active.
A Cormorant's Meal
After a long struggle to position the fish just right, a double-crested cormorant finishes off a relatively young spotted gar.
After a long struggle to position the fish just right, a double-crested cormorant finishes off a relatively young spotted gar.
Drowned Alligator Hatchling
A combination of salt water intrusion and altered water deliveries to Everglades National Park will likely decrease alligator nesting success, as seen by this baby gator whose nest was flooded.
A combination of salt water intrusion and altered water deliveries to Everglades National Park will likely decrease alligator nesting success, as seen by this baby gator whose nest was flooded.
Grand Canyon
Sun making shadows at the Grand Canyon.
Sun making shadows at the Grand Canyon.
Grand Canyon
Colorado River view.
Pahoehoe
Cooled ropey pahoehoe overlays active lava flows only detectable by heat radiating from the ground.
Cooled ropey pahoehoe overlays active lava flows only detectable by heat radiating from the ground.
Under the Everglades
Though not as charismatic, the underwater periphyton and other vegetation are the primary support for all other life in the ecosystem.
Though not as charismatic, the underwater periphyton and other vegetation are the primary support for all other life in the ecosystem.