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Detection of exogenous lake trout and endogenous spectaclecase DNA in the Big Piney River from an experimental release of lake trout slurry to study eDNA transport, September 2023 (ver.1.1, May 2025) Detection of exogenous lake trout and endogenous spectaclecase DNA in the Big Piney River from an experimental release of lake trout slurry to study eDNA transport, September 2023 (ver.1.1, May 2025)
This dataset includes eDNA concentrations of water samples from an experimental release of lake trout (Salvelinus namaycush) slurry used to analyze eDNA transport in the Big Piney River, Missouri. The spectaclecase (Cumberlandia monodonta) was also included as a target species due to the proximity of a known spectaclecase population at the slurry release site. The slurry, a frozen block...
Consumer-grade sonar applications for silver carp in overwintering habitats of the Lower Mississippi River, 2023 January 31 Consumer-grade sonar applications for silver carp in overwintering habitats of the Lower Mississippi River, 2023 January 31
In January 2023, the USGS demonstrated the use of side-scan sonar and down-imaging sonar to locate and quantify fish including invasive carp. A dike pool in the study area was surveyed (254-meter reach) using a Humminbird Helix sonar system. Sonar surveys included concurrent recordings of side-scan and down-imaging sonar. Proprietary sonar data were converted to PNG image files (i.e...
In Situ Fluorometric Measurements of Cyanobacteria, Green Algae, and Diatoms in Biofilms from Northwest Alaskan Rivers During Summer and Fall 2016-2019 In Situ Fluorometric Measurements of Cyanobacteria, Green Algae, and Diatoms in Biofilms from Northwest Alaskan Rivers During Summer and Fall 2016-2019
This dataset contains measurements of in situ benthic biofilms from rivers of northwest Alaska during summer and fall 2016-2019. Measurements were made using a Benthotorch (bbe Moldaenke, Kiel, Germany) hand-held fluorometer, which distinguishes taxa (cyanobacteria, green algae, diatoms) and provides estimates of standing biomass.
Effects of nitrapyrin (0 to 32 micrograms per liter) on oxidation of ammonia by a diverse nitrifier-enriched microbial community Effects of nitrapyrin (0 to 32 micrograms per liter) on oxidation of ammonia by a diverse nitrifier-enriched microbial community
These data were collected to determine the effect of nitrapyrin, a commercial nitrification inhibitor, on nitrification by a diverse nitrifier-enriched microbial (NEM) community. The NEM community was originally collected from an aquaculture pond in Columbia, Missouri and cultured in HEPES-buffered, minimal mineral salts media, supplemented with a nominal dose of 2 milligrams per liter...
Fairfax County Monitoring Network 2007 - 2022: Annual Loads, Regression Models, and Ancillary Data Fairfax County Monitoring Network 2007 - 2022: Annual Loads, Regression Models, and Ancillary Data
Nitrogen (N), phosphorus (P), and suspended sediment (SS) loads in Fairfax County, Virginia streams were calculated using monitoring data from 5 intensively monitored watersheds for the period from water year (October - September) 2008 through 2022. Nutrient (N and P) and SS loads were computed using a surrogate (multiple-linear regression) approach with lab analyzed N, P, and SS samples...
Chirp Sub-Bottom Profile Geophysical Data Collected in 2024 From Wallops Island and Assawoman Island, Virginia Chirp Sub-Bottom Profile Geophysical Data Collected in 2024 From Wallops Island and Assawoman Island, Virginia
As part of the Interconnected Coastal Environments at Decadal Timescales and Coastal Sediment Availability and Flux projects, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore geophysical survey to map the shoreface and characterize stratigraphy near Wallops and Assawoman Islands, Virginia (VA). The purpose of this...