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    • Mercury, carbon and nitrogen isotope ratios in seven Great Lake fish species from 1975 to 2021

    Metadata Updated: February 22, 2025

    Atmospheric mercury (Hg) deposition, which has been declining in North America since 1985, is the preeminent delivery pathway to the Great Lakes, making them sentinels for tracking shifts in atmospheric deposition. Lake productivity is changing as a result of reductions in phosphorus inputs and habitat shifts in productivity due to invasive mussels. This has altered Hg cycling and energetic coupling within the Lakes. Seven fish species were analyzed for bulk carbon, nitrogen, and Hg isotope ratios and amino acid-specific nitrogen isotopes ratios in fish from the U.S. Environmental Protection Agency Great Lake Fish Monitoring and Surveillance Program archives (1975 – 2021) and the 1994 Lake Michigan Mass Balance to reconstruct the energetic- and Hg-source spatial and temporal trends within each lake. Data for the following fish species are included in this dataset: alewife, bloater, chub, coho salmon, lake trout, rainbow smelt, walleye.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Created Date February 22, 2025
    Metadata Updated Date February 22, 2025

    Metadata Source

    Harvested from DOI EDI

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date February 22, 2025
    Metadata Updated Date February 22, 2025
    Publisher U.S. Geological Survey
    Maintainer
    @Id http://datainventory.doi.gov/id/dataset/0726c59dcef59e8adc8e7a4bd82e1904
    Identifier USGS:66705be4d34e2fc9b7e49c23
    Data Last Modified 20241220
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://datainventory.doi.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 2d54a2c7-a9c6-4efa-bfe3-7ec2a58eab9e
    Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
    Harvest Source Title DOI EDI
    Metadata Type geospatial
    Old Spatial -92.9004,41.1787,-75.5859,49.3251
    Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
    Source Datajson Identifier True
    Source Hash fe5aaccdee597504ef18e2e0a8bfeaad498ba2d1b86e08714ea16517201a46f6
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -92.9004, 41.1787, -92.9004, 49.3251, -75.5859, 49.3251, -75.5859, 41.1787, -92.9004, 41.1787}

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