Images

The kōlea, or Pacific Golden-Plover (Pluvialis fulva), is a familiar bird in Hawaiʻi that migrates to Alaska each summer to nest. 

Native Hawaiian and Alaska Native participants and project partners gathered at the Knowledge Exchange in Cordova, Alaska. 

Aerial shot of bird migration. The kōlea, or Pacific Golden-Plover (Pluvialis fulva), is a familiar bird in Hawaiʻi that migrates to Alaska each summer to nest. 

The kōlea, or Pacific Golden-Plover (Pluvialis fulva), is a familiar bird in Hawaiʻi that migrates to Alaska each summer to nest. 

Lettuce field in the Salinas River Valley. California’s Salinas Valley is one of the most productive agricultural basins in the world due to the fertile valley soil, temperate climate, and availability of water for irrigation.

Artichoke field in the Salinas River Valley. California’s Salinas Valley is one of the most productive agricultural basins in the world due to the fertile valley soil, temperate climate, and availability of water for irrigation. 

Example of Santa Ana Sucker (Pantosteus santaanae) lure with a PIT tag attached.

CAWSC Biogeochemistry group at 2025 IEP Workshop. Left to Right: Back Row - Maura Uebner, Keith Bouma-Gregson, Kyle Leathers; Middle Row - Crystal Sturgeon, Zoё Siman-Tov, Lane Bratz, Emily Richardson, Tamara Kraus, Alex Ryan; Front Row - Nick Framsted 

The photo shows members of the research team. From left to right: Tevin Bui (RCD), Jordan Buxton (USGS), Brett Mills (RCD), Alicia Ruan (RCD), and Brock Huntsman (USGS). Inset at right are Marissa Wulff (top) and Jeff Gronemyer (bottom), both of the USGS. 

CAWSC poster presenters at 2025 IEP Workshop. Clockwise from upper left: Anna Conlen, Elise Shea, Lex Thomas, Zoё Siman-Tov, Bryan Gopez, Emma Walker, David Hart, Maura Uebner, Lawrence Fujiwara, Trevor Violette.

Santa Ana Sucker (Pantosteus santaanae) being measured in PIT tag study done in the late summer and early fall of 2024.

This photo shows a passive integrated transponder (PIT) tag reader being used to test a tagged Santa Ana Sucker.

The photo shows (left) the raft outfitted with the PIT tag reader and two cameras, both facing down into the river. And (right) a PIT tag attached to a lure.

The above photos show raceways at the Riverside Corona Resource Conservation District (RCD) facility.

Footage of Santa Ana Sucker (Pantosteus santaanae) from passive (or stationary) camera. Part of a USGS study on the effectiveness and safety of the PIT tagging sampling method.

An open-source image recognition program was used to detect the fish and lures in the videos. The program was “trained” to recognize the fish and lures by exposing it to approximately 800 images of fish and non-fish.

Active (or moving) camera footage of Santa Ana Sucker (Pantosteus santaanae). Cameras were attached to “selfie sticks” and walked up and down the raceways (or fabricated streams).

Historical photo of the Malakoff Diggins hydraulic gold mine in the Sierra Nevada in California. 

This is a screenshot of the web tool: Legacy Mercury Contamination from Historical Gold Mining.

View of San Francisco from the USGS research vessel. The goal of this study was to identify the reasons for discrepancies between fChl measurements made under different sampling conditions. 

Sample map - Legacy Mercury Contamination in California’s Sierra Nevada. This map show locations of remediation efforts.