Presentation on theme: "June 2010 Gabriel Sampson. Introduction Opportunity cost in conservation selection Conservation program costs reduced considerably when land costs considered."— Presentation transcript:
Introduction Opportunity cost in conservation selection Conservation program costs reduced considerably when land costs considered (Ando et al., 1998) Feasibility of land-valuation models in conservation planning
Goals Hedonic model for Sonoma County Arrive at planning unit costs that reflect the land market Optimize conservation targets subject to realistic economic costs Compare to results using the old cost
Methods – hedonic model Observed market transactions for Sonoma County parcels 1991-2001 Discarded observations: industrial, commercial, condominium, restaurant, hotels, etc. 348 observations used
Hedonic model Selected independent variables (Newburn et al., 2006) Acres Persons per acre Distance to roads Farmland (binary) Grazing (binary) Easement (binary) Fee, mixed, transfer (binary) High risk (binary)
Model limitations Planning unit prices extrapolated from limited APN data Need to address land use change jointly with purchase cost (Newburn et al, 2005) Management costs not captured How would conservation influence future development patterns? 10 iterations in Marxan runs
Concluding remarks Strong correlation between site selections Variance in mid selection frequencies Irreplaceability may supersede site cost
References Ando, A.J., Camm, J., Polasky, S., Solow, A. (1998). Species Distributions, Land Values, and Efficient Conservation. Science 279:2126-28. Newburn, D., Berck, P., Merenlender, A. (2006) Habitat and Open Space at Risk of Land-Use Conversion: Targeting Strategies for Land Conservation. American Journal of Agricultural Economics 88(1):28-42. Newburn, D., Reed, S., Berck, P., Merenlender, A. (2005). Economics and Land Use Change in Prioritizing Land Conservation. Conservation Biology 1411-1420.
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