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Valuing Biodiversity

Valuing Biodiversity . Assessing relative value using national databases. Theo Stephens Department of Conservation February 2007. A discipline based approach…. Value the biosphere attributes that sustain benefits supply….and enjoy the benefits!

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Valuing Biodiversity

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  1. Valuing Biodiversity Assessing relative value using national databases Theo Stephens Department of Conservation February 2007

  2. A discipline based approach… Value the biosphere attributes that sustain benefits supply….and enjoy the benefits! (Value the health of the goose, enjoy her golden eggs!) For biodiversity, attributes that sustain benefits are: The full range (benefit volume, diversity, distinctiveness & options) Healthy functioning state (high quality & fragile benefits)

  3. Biodiversity Persistence Conservation of Pattern and Process = (The outcome we all want) Relative, not absolute value… • Valuation based on relative contribution to persistence • Not monetary • Can do: • Pattern assessment • Forecast spread of pests • Cost-Effectiveness Analysis • Limited ability for: • Process assessment (Note: Incursions affect processes) • Can’t do: • Cost Benefit Analysis

  4. The conceptual frame… • Relative value is indicated by contribution to: • A full range (pattern) • Healthy functioning state (process) • We don’t know how to quantify the trade-off • Assessment methods are better for pattern than process

  5. Data describing biodiversity… Trying to know the unknowable… 90,000 species, distributions known for ~500 So we use surrogates Key properties for surrogates: Spatially comprehensive National coverage Stable, reproducible, auditable Known basis for surrogacy (what it represents)

  6. So... what data do we have? • Environmental classifications(potential full range) • Land Environments (LENZ) • River environments (FWENZ • Offshore marine environments (MEC) • Land cover (what remains) • Land Cover Database (LCDB1 & LCDB2) • Ecosat (forests only) • Legally protected areas(security of what remains) • DOC estate • Protected Areas (PANZ – includes covenants) • Pressure(damage to biodiversity) • Freshwaters (under development) • Terrestrial (under development)

  7. Surrogates Three national databases: Indigenous cover (from Land Cover Database) for remaining native biodiversity LENZ for potential biodiversity pattern (i.e. “the full range”) Protected Area Network (multiple agencies) for legal protection

  8. Value mapping: products • Prioritisation & planning • Priority sites • Cost-effectiveness of conservation projects • Risk assessment • Biodiversity vulnerable to loss • Wilding Pine spread • Conservation performance reporting • Change in risk to remaining biodiversity • High Country land tenure reform The End

  9. Priority sites – where are they? (5% random sample) Priority pixels

  10. Cost-effectiveness: local projects

  11. Remaining biodiversity Vulnerability to loss

  12. Land Cover 1996/7 to 2001/2: Cumulative change in susceptibility to biodiversity loss NZ’s threatened environments Cumulative increase (and % C.I.) in susceptibility to biodiversity loss 1996/97 to 2001/02

  13. Increased risk, decreased security of biodiversity Increased security of biodiversity Low Risk<<>>High Risk • Tenure Review: Outcomes for biodiversity • Tenure Review has increased risk to the most vulnerable biodiversity Change in Risk of Biodiversity Loss Decrease<< >>Increase

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