Videos

Permanent Site: C1 West Transect; Depth: Meters (Feet); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.14525225,-123.57361291; Site Description: Substrate is entirely sand. All seaweeds are absent. Woody debris is scattered along entire transect (0:21 0:34, 0:59 seconds).

Permanent Site: F2 West Transect; Depth: 12.3 Meters (40.3 Feet); Distance from river mouth: 1.5 Kilometers (0.9 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.15672004,-123.55036603; Site Description: Substrate is mainly gravel mixed with a little cobble and an occasional boulder.

Permanent Site: K1 East Transect; Depth: 6.2 Meters (20.4 Feet) & 6.6 Meters (21.5 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.13592923,-123.5101581; Site Description: This is a shallow site. Sediment is a gravel/sand mixture.

Permanent Site: K1 West Transect; Depth: 5.8 Meters (19 Feet) & 5.6 Meters (18.4 Feet); Distance from river mouth: 4.5 Kilometers (2.8 Miles) east; Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.13592923,-123.51082988; Site Description: This is a shallow site. Sediment is a gravel/sand mixture.

Permanent Site: A2 East Transect; Depth: 12.8 Meters (Feet 42); Distance from river mouth: Kilometers 1.8 (1.1 Miles); Pre/Post Dam Removal: 2 years post-dam removal; Lat/Long: 48.14130295, -123.58766124; Site Description: One of our deeper sites at over 40 feet. Sediment is primarily sand/sandy mud. Seaweeds are absent this year.

Permanent Site: H1 East Transect; Depth: 5.5 Meters (Feet 17.8); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 3 years post-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites.

In this video, a bobcat approached a desert tortoise (a marked female in the study population) that was sleeping on the apron of her burrow. Bobcats are known predators of various life stages of the desert tortoise. In this case, the bobcat bent down to sniff the tortoise, and then touched its paw to the top of the tortoise's shell.

This collaborative project pairs artists from California's Central Coast and San Francisco Bay Area with scientists from the Santa Cruz-based U.S. Geological Survey's Pacific Marine and Coastal Science Center. The artist create work inspired by scientific research.

This American black bear and cub duo was seen simply investigating a tortoise burrow, and although it is surprising to see a black bear so low in elevation, it isn't impossible. The study site, Mesa, sits at the intersection of multiple ecosystems (Sonoran Desert, Mojave Desert, montane, and coastal sage scrub).

Coyotes were the second most frequently observed mammalian predator on the trail cameras. Coyotes are considered one of the primary predators of desert tortoises. In this instance, a coyote is passing by a burrow when it suddenly has a change in attention as it is passing by.

This presentation, "A mammal's take on the Rapture Hypothesis, Jacob's Ladder, and other notions of doom, gloom, and predictable uniform change in high elevation ecosystems of the Sierra Nevada", was conducted by Robert Klinger as a part of the Climate Change Science and Management Webinar Series.

America has questions about climate change, and the USGS has real answers. In this episode of Climate Connections, USGS scientists answer questions gathered from downtown Denver, Colorado. Questions include:

Melinda Chapman and Sharon Fitzgerald discuss the U.S. Geological Survey quality control and quality assurance for the USGS groundwater sampling program to characterize water-suppy well water quality in the area of North Carolina with potential for shale gas production.

Melinda Chapman and Sharon Fitzgerald discuss the U.S. Geological Survey groundwater sampling program to characterize water-suppy well water quality in the area of North Carolina with potential for shale gas production.

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows. 
 

"Lake Mead — Clear and Vital" is a thirteen minute documentary relating the crucial role of science in maintaining high water quality in Lake Mead. The program was produced coincident with release of the Lakes Mead and Mohave Circular a USGS publication covering past and on-going research in the lakes and tributaries of the Lake Mead National Recreation Area.

-- Coastal Community Tsunami Hazards and Risk

By Nathan Wood, Geographer

--Seismology Uncovers Hidden Secrets Beneath our Feet

By Walter Mooney, Geophysicist

One of the most tragic volcanic events of the 20th century occurred in Colombia, in 1985, when an eruption of Nevado del Ruiz produced lahars that swept down river valleys and destroyed communities in its path. Over 20,000 people perished.

--New Discoveries and Looming Threats

by Robert Fisher, Research Biologist

USGS employee, Hanna Coy, talks about stream gauging.