Presentation on theme: "Valuing ecosystem services- advantages and disadvantages of existing methodologies and application to PES Danièle Perrot-Maître Seminar on environmental."— Presentation transcript:
Valuing ecosystem services- advantages and disadvantages of existing methodologies and application to PES Danièle Perrot-Maître Seminar on environmental services and financing for the protection and sustainable use of ecosystems Geneva, October 2005
Outline of presentation Ecosystem goods and services Reasons to value ecosystem goods and services Valuation methods: definition, examples, advantages and disadvantages Applying valuation to PES design Key messages
Ecosystems products and services Products Food Fuel wood Non-timber forest products Fisheries products Marine products Wetlands products Medicinal and biomedical products Forage and agricultural products Water Reeds Building material Functions/Services Hydrological services Purification of water Capture, storage and release of surface and groundwater Mitigation of floods and droughts Biodiversity Maintenance of biodiversity (plants and animals) Climate Partial stabilization of climate through carbon sequestration Moderation of temperature extremes and the force of winds and waves Source: Adapted from Simpson (2001)
Existence values Intrinsic value of resources and landscapes, irrespective of its use such as cultural, aesthetic, bequest significance, etc. Direct values Outputs that can be consumed or processed directly, such as timber, fodder, fuel, non-timber forest products, meat, medicines, wild foods, etc. Indirect values Ecological services, such as flood control, regulation of water flows and supplies, nutrient retention, climate regulation, etc. Option values Premium placed on maintaining resources and landscapes for future possible direct and indirect uses, some of which may not be known now. USE VALUES NON-USE VALUES
Why value? Understand how much an ecosystem contributes to economic activity or society. For example, on average forests benefits in the Med region amount to about 1% of GDP. Indirect use value such as watershed protection contributes about 35% of total estimated value. Understand what are the benefits and costs of an intervention that alters the ecosystem (conservation investment, development project, regulation or incentive) and make ecosystem gods and services comparable with other investments How are costs and benefits of a change in ecosystem distributed? How to make conservation financially sustainable?
Market Prices Direct values Goods and products Indirect values Ecosystem services Option values Existence values Direct values Nature tourism Effect on Production Replacement Costs Cost of Providing Substitutes Cost of Avoided Damage Productivity & cost-based approaches Travel Costs Contingent Valuation Surrogate market & stated preference approaches
Surrogate Market Approaches Travel Costs Hedonic Pricing Effect on Production Production Function Approaches Replacement Costs Cost pf providing substitute Services Damage Cost Avoided Market Prices Contingent Valuation Conjoint Analysis Choice Experiments Cost- Based Methods Revealed Preference Methods Stated Preference Methods
MARKET PRICES What it costs to buy or sell a good or product Peoples actual willingness to pay E.g. Nam Et & Phou Loei NBCA, Lao PDR: Value of NTFP use for Viengthong District villages Cash income$634,000 Plant foods$45,000 Wild meats$476,000 Fuel and housing$480,000 Crop consumption$241,000 TOTAL VALUE$1,876,000
Advantages and Limitations of the Market Price Method +Use if primary resource or ecosystem affected has a commercial market (for ex. benefits of cleanup and closure of commercial fishing on fisheries). Prices, quantities and cost are easy to obtain. +The method uses observed data of actual preferences +The method uses standard, accepted economic techniques (consumer and producer surplus based on supply and demand curves) and is relatively easy to apply –Seasonal variations and other effects on price have to be considered –Usually the costs of transport to bring goods to the markets not included and benefits may be overstated –Many ecosystem goods and services do not have markets or markets are distorted or not well developed and market prices do not always fully reflect the value of ecosystem services to society (WTP)
PRODUCTIVITY METHOD The economic contribution of ecosystems to other production and consumption activities Market value as an input Flood attenuation benefits from forests, Madagascar Value of flood damage to paddy production NPV for forest watershed protection benefits: $126,700. Resulted in the establishment of Mantadia NP
Advantages and Limitations of the Productivity Method +Methodology straightforward, data requirements are limited and relevant data may be readily available hence methiod relatively inexpensive to apply –Only resources and services that are marketed can be valued –Most difficult aspect is to be able to quantify the biophysical relationship that link changes in supply or quality of ecosystem services with environmental changes or management options. Often use simplified assumptions. –If changes in ecosystem affects market price, then the method is more complicated and difficult to apply –If changes are too drastic, users of ecosystem goods and services may switch to other alternatives.
TRAVEL COSTS How much people spend to use or benefit from using ecosystems for recreational purposes Peoples implied willingness to pay USA, Value impacts of improved environmental quality on freshwater recreation in the US Combined benefit of all freshwater-based recreation: $37 billion/year
Advantages and Limitations of the Travel Cost Method +Limited to recreational values –Requires complex statistical analysis, large and complex data sets, hence expensive and time consuming –Likely to estimate value of one factor because difficult to separate out effect of different factors (lansdcape beauty and water)
REPLACEMENT COSTS The costs of replacing an environmental good or service A minimum estimate of money saved E.g. Ream National Park, Cambodia: Value of mangrove ecological services (flood barriers, upstream erosion control) Storm protection$60,000 Silt trapping$220,000 TOTAL VALUE$280,000
COSTS OF MITIGATING ECOSYSTEM DEGRADATION The costs of mitigating or averting the effects of the loss of an environmental good or service A minimum estimate of money saved E.g. Thua Thien Hue, Vietnam: Value of watershed catchment protection for urban and rural water supplies (Infrastructure to mitigate erosion, seasonal low water supplies and flooding) Investment costs$27 million Recurrent costs$1.8 million ANNUAL COST$2.88 million
DAMAGE COSTS AVOIDED The costs avoided from the destruction of ecosystem A minimum estimate of money saved E.g. Value of Phnom Bokor NP for watershed protection and hydropower generation Failure to invest in watershed management as a component of dam maintenance could incur NPC of over $2million in terms of power revenues foregone
Advantages of Cost-Based Methods +Particularly useful for valuing ecosystem services +Simple to apply and analyse (rely on 2dary data on benefits from ecosystem services and cost of alternative). Easier to measure costs of producing benefits than the benefits themselves when goods and services are not marketed. +Particularly useful if time and financial resources for the study are elimited or where it is not possible to carry out detailed surveys +Approaches are less data and resource intensive whereas data or budget limitations may rule out valuation methods that estimate WTP
Limitations of Cost-Based Methods –Provide only rough indicator of ecosystem value –Replacement cost: often difficult to find perfect replacements for ecosystems goods and services, hence valuation results tend to undervalue ecosystem value –Mitigation expenditures: often peoples perception of the effect of ecosystem loss and what would be required to mitigate these effects do not always match those of experts. –Damage cost method: estimated damages avoided remain hypothetical in most cases. Often difficult to relate damages to changes in ecosystems
CONTINGENT VALUATION The amount people would pay/accept under the theoretical condition that biodiversity could be bought and sold Peoples stated willingness to pay E.g. Doi Inthanon and Suthep Pui National Parks, Thailand: Willingness to pay for park entry fees Doi Inthanon 40 Baht per person Suthep Pui 20 Baht per person TOTAL VALUE $1.2 million/year
Advantages of CV +Very flexible. Can be used to estimate economic value of about anything but best to use it to estimate value of goods and services easily identified and understood by users +CV is the most widely accepted method for estimating TEV including non use, option and bequest values (only method to estimate option or existence values) +CV has been widely used and a great deal of research is being conducted to improve the methodology, make results more valid and reliable and understand strengths and limitations
Limitations of CV –Whether CV really measures WTP still controversial (most people unfamiliar making choices about ecosystem services) –Results highly sensitive to design of choice scenarios and how survey conducted (psychological aspects) –WTP sensitive to payment vehicle (WTA compensation) –Strategic bias to influence outcome –Non response bias –Many people including jurists, policy makers, economists and others do not believe the results of CV analysis
LESS COMMON METHODS Hedonic Pricing Conjoint Analysis Choice Experiments Difference in (property or wage) prices that can be ascribed to the existence or level of nearby environmental goods and services. Obtains information on preferences between various alternatives of environmental goods and services, at different price or cost. Present a series of alternative resource or use options, each of which are defined by various attributes including price.
Application of economic valuation to PES design
Watershed services: supply and demand Supply of services: Upstream land uses affect the Quantity, Quality, and Timing of water flows Demand for services: Possible downstream beneficiaries: Domestic water use Irrigated agriculture Hydroelectric power Fisheries Recreation Downstream ecosystems Source: World Bank 2003
Applying ecosystem valuation to payment for ecosystem service: simple in theory Benefits to producers Costs to offsite populations Conventional resource use: no conservation Conservation with payment for service Payment Conservation without payment Minimum payment willing to receive to change damaging behaviour to ecosystem Maximum payment willing to pay to reduce environmental damage Source: Adapted from World Bank 2002
In practice, not so simple…
In practice not so simple… Complex biophysical linkages (Brand 2003)
In practice still not so simple…valuing effects of change in ecosystem conditions on agricultural production
Use-and non use- of economic valuation to design payments for ecosystem services Public payments Costa Rica: $20-44/ha/yr for forest conservation- based on old subsidy based on opportunity cost of land use change USA (Conservation Reserve Program): $50/ha/yr. Opportunity cost and cost of conservation measures Ecuador: municipal water and electrical utility companies each donate 1% of total revenues for watershed protaction (oroginally 5% had been proposed by TNC) Brazil – a water utility in the city of Sao Paulo pays 1% of total revenues ($2,500 per month) for the restoration and conservation of the Corumbatai watershed. Funds are used to establish tree nurseries and for reforestation along riverbanks. Payment is outcoem of political negotiation.
Use-and non use- of economic valuation to design payments for ecosystem services Private payments France: US$320/ha/year for 7 years, equivalent to 75% of farm income Opportunity cost and actual cost of switching agricultural technology Costa Rica: a hydropower company pays US$10 per ha/year to a local conservation NGO for hydrological services in the Peñas Blancas watershed Australia: Since 1999, farmers in the Murray Darling watershed pay $AUD 85/ha/yr for forest conservation for 10 years or $AUD 17 per million liters of transpired water. Based on increase in marginal benefits due to reduced soil salinity resulting of 100 ha of reforested area.
Applicability and limitations of economic valuation Economic valuation highlights costs and benefits and cost bearers and beneficiaries that in the past have been ignored But for policy makers it may not, and probably will not be, the most important factor. Ecosystem valuation only provides a set of tools with which to make better and more informed decisions and is not a stand alone exercise. Valuation is out of necessity partial. Case studies underestimate ecosystem values at larger scale because the larger scale the more difficult it is to replace the ecosystem goods and services and interactions are too complex to understand impacts of alternatives. Some ecosystems will never be measurable or quantifiable because we do not have the necessary scientific, technical or economic data.
Applicability and limitations of economic valuation When ecosystem benefits that relate to attributes such as human life, cultural or religious significance, economic valuation raises serious ethical questions. Ecosystem valuation may be dangerous when it focuses only on financial or cash benefits at the expense of other types of values that cannot-or should not-be valued. Results of ecosystem valuation studies are not definitive, and transferable between groups and locations. They are generally based on the perception of a particular group at one point in time and is not universally valid. There is no garantee that the findings of economic valuation will support the wise use and management of ecosystems and their services. In fact the use of valuation studies to identify and promote new ways of capturing ecosystem values through markets or PES, can be a double-edged sword.
Key Messages It is easy to spend tons of money on valuation. It is easy to value everything, yet the results of valuation are not always useful or correct. Info on total benefit flows, even if correct, cannot provide guidance on specific conservation decisions which are about making incremental changes in these flows.
More key messages 1 st. step: ask yourself what is the purpose of the analysis, who should take its results into account 2 nd. step: what is your budget, can it be adjusted, what capacity is available, which time frame? 3rd. step: which process? Process may be as important as the result. Consider stakeholders, including policy makers, participation into the study.
And more… In designing PES, the most appropriate method to value an ecosystem service is the production function analysis-yet it is rarely done Be pragmatic, learn and adapt: most payments based on OC to service provided, not on marginal benefit to beneficiary. Payments need not be cast in stone but adapted as more is learned about the system, especially biophysical relationships. Economic valuation will only address equity issue if this is designed into the valuation study from the start. Hence back to step 1!
For further information: IUCN economic valuation products Working Papers & Policy Briefs Toolkit Case Studies
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