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ACE Irreplaceability (Rank 4 & 5)

Published by California Energy Commission | State of California | Metadata Last Checked: July 29, 2025 | Last Modified: 2023-03-06T22:10:28.290Z
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. 

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Complete Metadata
@type dcat:Dataset
accessLevel public
contactPoint 
                                            {
  "fn": "tdavid_CAEnergy",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:gis@energy.ca.gov"
}
description <div style='text-align:Left;'><p></p><p><span style='color:black;'>The full Terrestrial Irreplaceability dataset is part of the </span><a href='https://wildlife.ca.gov/Data/Analysis/ACE' target='_blank' rel='nofollow ugc noopener noreferrer'>Areas of Conservation Emphasis (ACE)</a><span style='color:black;'> project from CA Department of Fish and Wildlife (CDFW). </span><a href='https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=150816&amp;inline' target='_blank' rel='nofollow ugc noopener noreferrer'>ACE Terrestrial Irreplaceability</a><span style='color:black;'> 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. </span></p> <p><span style='color:black;'>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.</span></p><p><span style='color:black;'>This layer is featured in the </span><a href='https://experience.arcgis.com/experience/de6ab11146bf47068ff294d87780ce00' target='_blank' rel='nofollow ugc noopener noreferrer'>CEC 2023 Land-Use Screens for Electric System Planning</a><span style='color:black;'> data viewer. </span></p> <p><span style='color:black;'>For more information about this layer and its use in electric system planning, please refer to the </span><a href='https://www.energy.ca.gov/data-reports/california-energy-planning-library/land-use-screens' target='_blank' rel='nofollow ugc noopener noreferrer'>Land Use Screens Staff Report in the CEC Energy Planning Library.</a><span style='color:black;'> </span></p><br /><p></p></div>
distribution 
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identifier 8268065f-9b56-4921-80ac-2667f88f136f
issued 2023-03-01T00:57:27.000Z
keyword 
                                            [
  "CAOpenData",
  "California Energy Commission",
  "California Natural Resources Agency",
  "SB 100",
  "SB100",
  "STEP",
  "california energy commission"
]
license http://www.opendefinition.org/licenses/cc-by
modified 2023-03-06T22:10:28.290Z
publisher 
                                            {
  "name": "California Energy Commission",
  "@type": "org:Organization"
}
theme 
                                            [
  "Natural Resources"
]
title ACE Irreplaceability (Rank 4 & 5)

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