Images

Gnawed tree from beaver activity on tributary of the Agashashok River, Noatak National Preserve

Beaver dam crossing mainstem of Rabbit Creek near the headwaters, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

This video sequence begins with a close-up of the fumaroles on the north side of Halema‘uma‘u, then widens to show a broader view of the crater, with the water pond at the bottom. The video then shows a close-up of the water surface, with steaming and ripples.

Before deploying the subbottom profiler for leg 2 of the Cape Cod Bay 2019 Survey, Wayne Baldwin, Alex Nichols, and Chuck Worley made sure that the floats are sufficiently inflated. In the relatively shallow waters of Cape Cod Bay we want the instrument towed at water's surface for the resolution of the sub seafloor geology.

USGS members of the science party on board R/V Rachel Carson prepare the hydrophone streamer for deployment.

A near-vertical view into Halema‘uma‘u, with the water pond at the bottom still in the shadow of early morning. USGS photo by D. Becker.

Photomicrographs from a Zebra Finch (Taeniopygia guttata) from a California aviary that was found dead. (A) Numerous yeasts are present in the lumen (*) of the proventriculus. H&E stain. (B)  The yeasts are 2 x 40 um, basophilic, rod-shaped and occur in stacks. H&E stain.

(A) Photomicrograph from a Herring Gull (Larus argentatus) from Wisconsin shows a normal thyroid gland for comparison.  Within the thyroid gland there are variably-sized follicles filled lined by cuboidal epithelium (arrowhead) and filled with colloid (*). H&E stain.

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

Beaver swimming near dam on Rabbit Creek, Cape Krusenstern National Monument

2270-trackline kilometers of geophysical data and 320 km^2 of continuous bathy/backscatter was collected in Leg 1 of the Cape Cod Bay 2019 seafloor mapping cruise.

2270-trackline kilometers of geophysical data and 320 km^2 of continuous bathy/backscatter was collected in Leg 1 of the Cape Cod Bay 2019 seafloor mapping cruise.

2270-trackline kilometers of geophysical data and 320 km^2 of continuous bathy/backscatter was collected in Leg 1 of the Cape Cod Bay 2019 seafloor mapping cruise.

Tree-ring analyses from Lassiter Swamp, located along a tributary of the Chowan River, indicate that cypress trees have occupied the site for at least 500 years. To extend the record even farther back in time, scientists from USGS, Duke University and East Carolina University are working together with students at C.S.

Measuring the amount of water impounded by a beaver dam on Rabbit Creek, Cape Krusenstern National Monument. 

Sunset photo taken during Cape Cod Bay sea-floor mapping cruise.

Arctic cisco (Coregonus autumnalis) captured along the Beaufort Sea coastline in Alaska.

Arctic smelt (Osmerus dentex) captured along the Beaufort Sea coastline in Alaska. This species is a close relative of rainbow smelt (Osmerus mordax).

Arctic smelt (Osmerus dentex) captured along the Beaufort Sea coastline in Alaska. This species is a close relative of rainbow smelt (Osmerus mordax)