Winter temperature extremes control the distributions of subtropical fishes. Common snook (Centropomus undecimalis), aggregate at a spring in northern Florida during winter. Snook are warm saltwater game fish, common in Florida, that have been moving further northward as extreme cold spells become less frequent and less intense.
Images
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Subtropical snook gather at a warm Florida springhead in winter
Winter temperature extremes control the distributions of subtropical fishes. Common snook (Centropomus undecimalis), aggregate at a spring in northern Florida during winter. Snook are warm saltwater game fish, common in Florida, that have been moving further northward as extreme cold spells become less frequent and less intense.
Los Angeles River at USGS Streamgage 11092450 near Sepulveda Dam
A concrete-lined stretch of the Los Angeles River that runs near Sepulveda Dam. USGS streamgage 11092450 can be seen in the lower left along the river wall. Restoration is planned for this stretch of the river that runs through the San Fernando Valley.
A concrete-lined stretch of the Los Angeles River that runs near Sepulveda Dam. USGS streamgage 11092450 can be seen in the lower left along the river wall. Restoration is planned for this stretch of the river that runs through the San Fernando Valley.
JohnBradford_profile_photo.jpg
Profile photo of John Bradford, U.S. Geological Survey Southwest Biological Science Center
Profile photo of John Bradford, U.S. Geological Survey Southwest Biological Science Center
Margerie Glacier, Glacier National Park and Preserve
An aerial view of Margerie Glacier. Glaciers are important for many species found in Glacier Bay National Park and Preserve. NPS.
An aerial view of Margerie Glacier. Glaciers are important for many species found in Glacier Bay National Park and Preserve. NPS.
San Miguel River, Colorado, Fall 2020
Looking upstream on the San Miguel River in Colorado in fall 2020 when baseflow (groundwater flowing to streams) is the primary contributor to streamflow.
Looking upstream on the San Miguel River in Colorado in fall 2020 when baseflow (groundwater flowing to streams) is the primary contributor to streamflow.
Rim Fire in Yosemite National Park.
Rim Fire in Yosemite National Park.
Mountains in Crested Butte
Photo of mountains from Crested Butte, CO.
USGS gage at Cambridge, Massachusetts
USGS gage 422302071083801 Fresh Pond in Gate House at Cambridge, Massachusetts.
USGS gage 422302071083801 Fresh Pond in Gate House at Cambridge, Massachusetts.
Upstream view of the Middle Fork Fortymile River, Alaska
Upstream view of the Middle Fork Fortymile River near U.S. Geological Survey streamgage 15331000, Middle Fork Fortymile River near mouth near Chicken, Alaska
Upstream view of the Middle Fork Fortymile River near U.S. Geological Survey streamgage 15331000, Middle Fork Fortymile River near mouth near Chicken, Alaska
Puerto Rico’s Sierra de Luquillo mountains, El Yunque National Forest
: A site visit to Puerto Rico’s Sierra de Luquillo mountains and El Yunque National Forest, 2020. (credit – M. Eaton)
: A site visit to Puerto Rico’s Sierra de Luquillo mountains and El Yunque National Forest, 2020. (credit – M. Eaton)
The whistling coqui (E. cochranae)
The whistling coqui (E. cochranae), one of 17 iconic Puerto Rican amphibians in the genus Eleutherodactylus, observed in a lowland delta marsh of the Arecibo River on Puerto Rico’s north coast. (credit – M. Eaton)
The whistling coqui (E. cochranae), one of 17 iconic Puerto Rican amphibians in the genus Eleutherodactylus, observed in a lowland delta marsh of the Arecibo River on Puerto Rico’s north coast. (credit – M. Eaton)
Post-Fire Landscape
Snag fall after the 2011 Las Conchas Fire, which burned over 150,000 acres in New Mexico.
Snag fall after the 2011 Las Conchas Fire, which burned over 150,000 acres in New Mexico.
View South from Wolverine Glacier
View South from Wolverine Glacier
View South from Wolverine Glacier
Taking water quality samples in Alaska
Earl Alstrom and Carol Hasburgh taking water quality samples near St. Mary’s, Alaska.
Earl Alstrom and Carol Hasburgh taking water quality samples near St. Mary’s, Alaska.
The Yukon River, Alaska
The Yukon River near St. Mary’s, Alaska.
The Yukon River near St. Mary’s, Alaska.
The Yukon River, Alaska.
The Yukon River near Pilot Station, Alaska.
The Yukon River near Pilot Station, Alaska.
Seagull on Indian Rocks Beach, Florida
Seagull on Indian Rocks Beach, Florida
Seagull on Indian Rocks Beach, Florida
Bison in Yellowstone National Park’s Northern Range
Bison in Yellowstone National Park’s Northern Range, where scenario planning work is currently underway.
Bison in Yellowstone National Park’s Northern Range, where scenario planning work is currently underway.
Active Layer Network, Alaska.
From left to right: Ryan Toohey, Bernard TKTKTK, Jeremy Littell (AK CASC Lead Scientist), Malinda Chase (AK CASC Tribal Liaison), Philomena Keyes, and Victor Tonuchuk, Jr. at the Active Layer Network site in Kotlik, Alaska.
From left to right: Ryan Toohey, Bernard TKTKTK, Jeremy Littell (AK CASC Lead Scientist), Malinda Chase (AK CASC Tribal Liaison), Philomena Keyes, and Victor Tonuchuk, Jr. at the Active Layer Network site in Kotlik, Alaska.
Members of the Kotlik (Querrullik) governance
Various members of the Kotlik (Querrullik) governance talking about environmental changes for the Building Resilience Project.
Various members of the Kotlik (Querrullik) governance talking about environmental changes for the Building Resilience Project.