Images

To adapt to rising sea levels, coastal wetlands can migrate landward at the expense of adjacent freshwater wetlands and upland ecosystems, but migration can be hindered by natural and anthropogenic barriers. This photo shows marsh migration constrained by topographic and urban barriers in southern California. 

Agency Lake is the northern arm of Upper Klamath Lake connected by a narrow channel. This photo was taken near the USGS Lake level monitoring station, Agency Lake near Klamath Agency, OR - 11504300.

In cooperation with the Idaho Department of Fish and Game (IDFG) the Idaho Unit recently completed a series of research projects to better understand the effects of catch-and-release angling on survival and reproductive success of native trout and steelhead. 

Five tule white-fronted geese take off from Summer Lake Wildlife Area, the primary stopover site for this species on its fall migration.

The Aravipa Hotshots (fire crew) work on the Caldor Fire near South Lake Tahoe in California. 

Coral reef in Tres Palmas Marine Reserve at Steps Beach, Rincón, Puerto Rico.

A scenic view of the Beaufort Sea, Alaska. This study site will evaluate the nearshore marine feeding areas of breeding adult red-throated loons and assess the response of loon reproductive success and nutritional content of nearshore fish communities.

Geologist George Case approaches an old exploration trench exposing stratiform Ag-Sn-Pb-Zn mineralization in the Groundhog Basin deposit area.

After the Robertson Draw Fire burned south of Red Lodge, Montana, the lupine wildflower regenerated. 

A vegetated drainageway wetland on Bureau of Land Management land near Rawlins, WY

A map showing North America's tropical-to-temperate transition zone. Red, orange, and yellow depict the more tropical zones, and blues depict the more temperate zones, based on to the coldest recorded temperature for each area between 1980 and 2009.

 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.

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.

Bunnel Brook at USGS streamgage 01188000 near Burlington, Connecticut with snow covered banks flowing during the winter.

An aerial view of Margerie Glacier. Glaciers are important for many species found in Glacier Bay National Park and Preserve. NPS.

Golden eagle populations in North America are either holding steady or possibly in decline and below the number that which the environment can support.

Antelope standing on sagebrush near Silver City, Idaho. BLM Fire and Aviation Photo Contest 2020. Category: The Land We Protect

An aerial view of the upper cracks in the Wolverine Glacier icefall as sunset approaches.

Looking upstream on the San Miguel River in Colorado in fall 2020 when baseflow (groundwater flowing to streams) is the primary contributor to streamflow.

Unuk River waterfalls from old lava pipes. Volcanic lava pipes form as the result of violent eruptions of deep-origin volcanoes. The Unuk River is one of the transboundary watersheds of Southeast Alaska.

Devin Gaige and Amanda May measure bathymetry of the Black River near Great Bend, NY