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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    ACE Irreplaceability (Rank 4 & 5)

    Metadata Updated: July 24, 2025

    The full Terrestrial Irreplaceability dataset is part of the Areas of Conservation Emphasis (ACE) project from CA Department of Fish and Wildlife (CDFW). ACE Terrestrial Irreplaceability provides a measure of the relative importance of an area based on the number of California endemic, special-status species found there, and the breadth of their distribution, so that species which are more geographically constrained produce a higher score. This geographic weighting system makes a site more ‘irreplaceable’ because it supports species which are found in fewer locations. Rare endemic species are identified by the California Species of Special Concern reports, the California Rare Plant Rank 1B plants, State or Federally-listed species (threatened, endangered, or candidate species), and fully-protected species. 

    Ranks 4 and 5 are used as an exclusion in the biological planning priorities component of the Core and SB 100 Terrestrial Climate Resilience Study Screens. This ensures that areas of technical resource potential identified through screening avoid lands with higher conservation value for irreplaceability.This layer is featured in the CEC 2023 Land-Use Screens for Electric System Planning data viewer. 

    For more information about this layer and its use in electric system planning, please refer to the Land Use Screens Staff Report in the CEC Energy Planning Library. 

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date July 24, 2025
    Metadata Updated Date July 24, 2025

    Metadata Source

    Harvested from State of California

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 24, 2025
    Metadata Updated Date July 24, 2025
    Publisher California Energy Commission
    Maintainer
    Identifier 8268065f-9b56-4921-80ac-2667f88f136f
    Data First Published 2023-03-01T00:57:27.000Z
    Data Last Modified 2023-03-06T22:10:28.290Z
    Category Natural Resources
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Datagov Dedupe Retained 20250724164837
    Harvest Object Id 91b8a76e-b0bd-4792-a0e5-5aeffc77d724
    Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
    Harvest Source Title State of California
    License http://www.opendefinition.org/licenses/cc-by
    Source Datajson Identifier True
    Source Hash d2b10edf04a16f4c5164554a606987432894c4e97b8c71a4ad46e9555b4131b3
    Source Schema Version 1.1

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