Data

This data release contains all collected data sampled during vertical stratification events, as well as during times of vertical mixing within and around Suisun Cutoff, in Suisun Bay, CA. Data were collected using a holistic approach spatially and temporally, looking at hydrodynamics, biotic compositions, and water biogeochemistry throughout the water columns at designated points in...

This data release was produced by the U.S. Geological Survey (USGS) in cooperation with the Bureau of Reclamation (Reclamation) to present the results of monitoring efforts on the Yellowstone River fish bypass channel according to the specifications of the Lower Yellowstone Adaptive Management and Monitoring Plan. The fish bypass channel was constructed to provide upstream migrating fish...

This report includes analyses of physical characteristics, such as particle size distribution, density, clast dimensions, and measured area mass, for samples collected from the 2023 eruption of Shishaldin Volcano, Alaska. Reported samples include 8 samples collected by an Alaska Volcano Observatory (AVO) field team during August 20–22, 2023, 12 distal samples collected by the public...

This U.S. Geological Survey (USGS) data release contains phytoplankton classification and enumeration results from near-surface water samples collected during a nationwide harmful algal bloom (HAB) monitoring effort in partnership with the National Park Service (NPS) Water Resources Division. Samples were collected during the 2021-2024 monitoring seasons from 26 National Parks across the...

The orthomosaic, digital surface model and point cloud presented here document conditions at Pickle Pond, part of the Saint Louis River Area of Concern in Superior, Wisconsin. Aerial images were collected in July 2021, prior to planned ecological restoration, using a DJI Phantom with FC6310 sensor at a nominal elevation of approximately 100 meters above the surface of the lake water...

The orthoimagery, digital surface model and point cloud presented here document conditions at Pickle Pond in Superior, Wisconsin in August 2020, prior to planned ecological restoration. Aerial images were collected using a DJI Phantom with FC6310 sensor at a nominal elevation of approximately 70 meters above the surface of the lake water. Data were processed using structure-from-motion...

We conducted a pilot study to evaluate the extent of cold water refuge use by juvenile outmigrating fall-run Chinook salmon (Oncorhynchus tshawytscha) in relation to managed water flows in the Klamath River. Juvenile fall-run Chinook salmon were captured and implanted with passive integrated transponder (PIT) tags and subsequently detected by submersible antennas that were strategically...

Data were collected as part of a long-term capture-recapture program to assess the status and dynamics of populations of two long-lived, federally endangered catostomids in Upper Klamath Lake, Oregon and Clear Lake Reservoir, California. Lost River suckers (LRS; Deltistes luxatus) and shortnose suckers (SNS; Chasmistes brevirostris) have been captured and tagged with passive integrated...

The U.S. Geological Survey (USGS) routinely collects direct measurements of high-elevation mountain snow accumulation at South Cascade Glacier and Sperry Glacier; two of five benchmark glaciers associated with the U.S. Geological Survey Benchmark Glacier Project. South Cascade Glacier is located in the Cascade Range in Washington. Measurements began at South Cascade Glacier during the

These data contain two tables of summarized activity sensor and location data of 29 polar bears that fed at bowhead whale remains left by subsistence hunters. Remains occurred on Barter and Cross Islands on the northern coast of Alaska. Activity sensor data were collected from 6 bears using tri-axial accelerometers. The data are presented in two tables providing a summary of all...

The area burned in high severity fire as well as the proportion of fires burning at high severity have been increasing in southwestern ponderosa pine (Pinus ponderosa) forests since the 1980s, with over 100,000 hectares burning in many recent years and many fires burning at over 40% moderate to high severity. These fires often contain large patches (>100 ha) of 100% tree mortality. This...

This dataset includes population sizes of free-roaming horses (Equus caballus) in Nevada, USA, within specific Herd Areas (HAs), which are Bureau of Land Management (BLM) management units. The management units in this dataset include the following HAs: Applewhite, Delamar Mountains, Meadow Valley Mountains, Clover Mountains and Clover Creek. Data were collected via aerial helicopter...