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Published byChristian Ralph Morton Modified over 9 years ago
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The Economics Implications of Fuel Management: Sagebrush Rangelands Authors: Michael Taylor, Kimberly Rollins, Mimako Kobayashi, Robin Tausch Presenter: Laine Christman (UNR) For the Eastern Nevada Landscape Coalition and Nevada Pinyon-Juniper Joint Summer Conference July 16 th, 2014
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Introduction and Study Area Why the Great Basin? Suffering from invasive grass and PJ encroachment Wildfire contributes to these threats Ecosystem changes effects costs of fighting fire, habitat, ranching, recreation values, etc. Treatments to reduce threats Reduce fuel loading/characteristics – lessen wildfire severity Restore health and resiliency of the ecosystem What is the value of these treatments? One approach – put benefits in terms of reduced future wildfire suppression costs Wyoming Mountain Big
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The Model Inputs Treatment cost (per acre) and probability of success FRI and cost of wildfire (per acre) Transition time between ecologic health states Assume a finite number of year without wildfire or treatment Assume fire in “healthy state” is, fire in “unhealthy state” is Simulation Based – dynamic Changes happen over time Uncertainty regarding state, success, fire Defined States of Health Mountain Big Sagebrush Healthy = Shrubs/ native grass or mix PJ/shrubs/ native grass Unhealthy = Closed Canopy PJ or invasive grass dominated Wyoming Sagebrush Steppe Healthy = Shrubs/grass Unhealthy = Decadent sagebrush/grass or invasive grass dominated
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STM Big Mountain Sagebrush (>6500 ft)
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STM Wyoming Sagebrush Steppe (4700-6500 ft)
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Results - WSS Wyoming Sagebrush Steppe - Initial Ecological State WSS-1 Healthy sagebrush WSS-2 Mature woody brush with annual grass WSS-3 Annual Grass Dominated Avg. Total Suppression Costs (NPV) – No Treatment $350$364$390 Avg. Total Suppression Costs (NPV)– With Treatment $56$231$251 Avg. Cost of Treatment(s) $19.50$205$164 Average Wildfire NET Suppression Costs Savings (NPV) $272-$72-$2,782 Average Benefit Cost Ratio (NPV) 13.30.70.06 WSS-1 Benefit = $272/acre (CBR = 13.3) Tx Cost - $19.50/acres and highly successful are preventing transition Expected wildfire cost savings = $293/acre WSS-2 Treatment is expensive ($205/acre) only successful half the time Failure moves to WSS-3 WSS-3 reduces wildfire suppression costs Treatment is extremely expensive Rarely successful
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Result Table - MBS Mountain Big Sagebrush - Initial Ecological State MBS-1 Healthy sagebrush MBS-2 PJ, mature sagebrush &cheatgrass MBS-2 Closed-canopy PJ & cheatgrass MBS-3 Cheatgrass dominated Avg. Total Suppression Costs (NPV) – No Treatment $273$561$576$1,448 Avg. Total Suppression Costs (NPV) – With Treatment $16$158$793$894 Avg. Cost of Treatment(s) $19.50$45.50$205$164 Ave Wildfire NET Suppression Costs Savings (NPV) $90$358-$419-$2,332 Ave. Benefit Cost Ratio (NPV) 5.79.0-1.10.2 MBS-1 & MBS-2 Only BCR greater than 1 Cheap, successful, prevent transition MBS-3& MBS-4 Expensive, unsuccessful Not a good return on investment
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Results and Conclusion Take Home Message Fuel treatment are cost effective for healthiest states only Treatment costs are relatively cheap and success is relatively high Results hold for a range of different success rates Fuel treatment costs greater than expected wildfire costs for unhealthiest states Once degraded, benefits reduce dramatically Rehabilitation costs are expensive and success is relative low Fuel Treatment Priority for a uniform landscape Focus on lands that have not yet transitioned 1.WSS-1 = 13.3 2.MBS-1b CBR = 9.0 3.MBS-1a CBR = 5.7
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Thank You
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