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  • Executive summary
  • Front Material
    • Contents
    • Index of figures
    • Index of tables
    • Acronyms and abbreviations
    • Terms and definitions
  • Getting started
  • Introduction
    • The urgency of targeted biodiversity conservation
    • Simplicity, complexity theory, and biodiversity
    • Inclusion of Indigenous Peoples and local communities by design
    • Biodiversity methodology benefits
  • Overall description
    • Objectives
    • Scope
    • Limitations
  • Project description
    • Principles
      • Principles of working with IP
    • Eligibility criteria
      • Land ownership and law
    • Additionality
    • Project boundaries
      • Spatial limits of the BCP
      • Temporal limits of the BCP
      • Grouped projects
    • Implementation plan
      • Measurement approaches
      • Indicator species observations
      • Risks and uncertainty
    • Effective participation
      • Community involvement
      • Capacity for action
      • Financial transparency
      • Safeguards checklist
  • Calculation
    • Unit calculations
    • Area calculations
    • Time calculations
    • Integrity calculations
    • Value calculations
  • Baseline assessment
    • Baseline ecosystem categorization
    • Analysis of agents and drivers of biodiversity loss
    • Baseline biodiversity (optional)
    • Baseline risk of biodiversity loss
    • Indicator species selection
    • Indicator species integrity score
  • SDG contributions
  • Monitoring plan
    • Monitoring report
    • Additional monitoring requirements
  • Authors
  • References
  • Appendices
    • Appendix A: Biodiversity methodologies comparison table
    • Appendix B: Sample legal proof of land control
    • Appendix C: Sample baseline ecosystem categorization
    • Appendix D: Species categorization of richness
    • Appendix E: Sample selection of indicator species
    • Appendix F: Sample indicator-species observations
    • Appendix G: Sample open-source code and calculation
    • Appendix H: Indigenous authors
    • Appendix I: Letters of support
      • Fernando Ayerbe, Ornithology
      • Ned Hording, Biodiversity
      • Olber Llanos, Zoologist
      • Mike McColm, Ethnology
      • Peter Thomas, Anthropologist
      • Jesús Argente, Marine biology
      • Sara Andreotti, Marine Biologist
      • Carolina Romero, Lawyer.
      • Daniel Urbano, Herpetologist
      • Ramesh Boonratana PhD, Primatologist
      • Theodore Schmitt, Conservationists
      • Anja Hutschenreiter, Ecologist and Tropical Conservationist
      • Miguel Chindoy, Indigenous leader
    • Appendix J: Sample uses of biodiversity unit
    • Appendix K: How to do FPIC
    • Appendix L: Independent Expert Panel Checklist
    • Appendix M: How to calculate a biodiversity credit by hand
    • Appendix N: How to calculate home ranges
    • Appendix O: How to calculate integrity scores
  • Document history
  • Disclaimer
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  1. Calculation

Integrity calculations

Calculating the Integrity of the crediting area via indicator species with partial integrity scores

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Last updated 1 year ago

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As discussed in the , indicator species and thus their observation area have an based on their ability to represent the rest of their ecosystem.

We have addressed the union of observations in space and time. While this is relatively uncomplicated for two observations from species that have an integrity score of +1 (fully representative of the ecosystem) it can become complicated in the presence of species that have partial integrity scores.

This section explains the theory behind the summation of partial integrity scores, and provides some visual examples.

Partial scores can be summed. Where multiple sightings occur, the species indicator scores can be added together, to a maximum of +1. For example, if two indicator species such as a Tapir, with a score of 0.5 were sighted at the same coordinates, on the same day, the combined score would be +1 and a full VBC could be issued for hectares in the overlapping hectares.

Figure 11. Summing overlapping partial integrity scores.

Indicator species that offer full integrity, cannot be greater than +1 where they overlap, however a species like a Jaguar that has an integrity score of +1 will achieve the higher score on an overlapping area.

Figure 11a. Summing overlapping full and partial integrity scores.

While partial integrity scores may not offer additional crediting benefit, a full spectrum of data gives projects more validity in their claims to represent an intact ecosystem, and factors into qualitative assessments performed by IEP in their final evaluations.

Baseline assessment
Integrity score