Skip to main content
U.S. flag

An official website of the United States government

Upper Skagit Reservoir Food Web Data, 2005-2021

March 29, 2024

This release includes data used to evaluate the structure and function of the Ross Lake and Diablo Lake food webs. This includes data on zooplankton density and production (zooplankton_density.csv and daphnia_region_production_biomass.csv), lake volume estimates used to expand zooplankton density and production data (lake_volume_estimates.csv), fish sampling (FishSampleEvents.csv), fish biological information including diets, age, and stable isotope analysis (FishFullData_formatted.csv, FishPreyLength.csv), scale back-calculations (salmonid_back_calc.csv, rss_back_calc.csv), fish energy density (calorimetry_processed.csv), stable isotope data for invertebrate end members (si_inverts.csv), and hydroacoustic sampling (ross_ha_densities.csv, diablo_ha_densities.csv). Fish and zooplankton sampling and stable isotope analysis were conducted by the USGS in 2019-2021, and hydroacoustics surveys were conducted in 2021. These data were also combined with fish data (species, size, age) from the National Park Service collected in 2005-2017 to evaluate fish size and age structure across a larger period of time. The bioenergetics model and information on running the model including inputs and outputs from our simulations and a user guide can be found the in folder. Please refer to the associated publications for additional details about data collection and processing.

Publication Year 2024
Title Upper Skagit Reservoir Food Web Data, 2005-2021
DOI 10.5066/P14FNXDV
Authors Rachelle C Johnson, Tessa J Code, Benjamin L Jensen, Marshal S Hoy, Karl D Stenberg, Carl O Ostberg, Jeff Duda, David A Beauchamp
Product Type Data Release
Record Source USGS Digital Object Identifier Catalog
USGS Organization Western Fisheries Research Center (WFRC)