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    • Rocky Intertidal Monitoring Datasets for the San Francisco Bay Area Network: 2006-2024 - Data Package

    Metadata Updated: September 16, 2025

    This dataset contains data collected at 5 monitoring stations in Golden Gate National Recreation Area and Point Reyes National Seashore as part the San Francisco Bay Area Network Rocky Intertidal Monitoring Program. Monitoring involves annual summer-fall sampling of permanent photoquadrats, ochre star (Pisaster ochraceus) transects, surfgrass (Phyllospadix spp.) transects, mussel beds, motile invertebrates, and owl limpet (Lottia gigantea) plots. This dataset also includes legacy photoplot and seastar data collected at Golden Gate NRA from 1989-2005. Permanent photoplots (50 x 75 cm) are established in target assemblages (i.e. barnacles, mussels, turfweed, etc.) and percent cover of the major taxa within these photoplots is assessed using photographic analysis or field scoring. Owl limpet plots were established and sampled once in 2016 at Pt. Bonita, while motile invertebrate surveys were discontinued in 2014 at all sites. Table 'checklist_sampled_PORE_GOGA.csv' defines the monitoring components by site, survey date, survey type, target assemblage and quatraplot by survey event that were sampled. This table should be referenced to understand sampling effort and completeness of sampling by events. The purpose of this dataset is to provide monitoring information on the temporal dynamics of target invertebrate, algal species and surfgrass across accessible, representative, and historically sampled rocky intertidal sites at Point Reyes National Seashore and Golden Gate National Recreation Area to help assess level of impacts and changes outside normal limits of variation due to oil spills, non-point source pollution, or other anthropogenic stressors that may come from within and outside the parks; to help determine status, trends, and effect sizes through time for morphology, color ratios, and other key parameters describing population status (e.g., size, structure) of the selected intertidal organisms; and to document invasions of non-native species, changes in species ranges, disease spread, and rates and scales of processes affecting the structure and function of rocky intertidal populations and communities to better understand normal limits of variation. All tables were exported from the Multi-Agency Rocky Intertidal Network database managed by the University of California Santa Cruz.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date September 16, 2025
    Metadata Updated Date September 16, 2025

    Metadata Source

    Harvested from DOI NPS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 16, 2025
    Metadata Updated Date September 16, 2025
    Publisher National Park Service
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/nps-datastore-2315037
    Data First Published 2025-08-19T00:00:00Z
    Data Last Modified 2025-08-19T00:00:00Z
    Category Data Package
    Public Access Level public
    Bureau Code 010:24
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/nps-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 afcc1c90-953e-4a88-89a8-f61b782c5ca4
    Harvest Source Id d917c1a9-26b7-43ea-b8c5-c77ec750a850
    Harvest Source Title DOI NPS DCAT-US
    Homepage URL https://irma.nps.gov/DataStore/Reference/Profile/2315037
    License https://creativecommons.org/publicdomain/zero/1.0/deed.en
    Old Spatial -123.0286,37.4338,-122.2767,38.2447
    Program Code 010:119, 010:118
    Source Datajson Identifier True
    Source Hash 0f70f6863c9c6e9b31675e4846c41dcccd71f363aa4e0d2b9c4ad5c0f869f00f
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -123.0286, 37.4338, -123.0286, 38.2447, -122.2767, 38.2447, -122.2767, 37.4338, -123.0286, 37.4338}

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