Economics of HABs: Benefits and Costs of Prevention Presentation prepared for the "Global Solutions to Regional Problems: Collecting Global Expertise to.

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Presentation transcript:

Economics of HABs: Benefits and Costs of Prevention Presentation prepared for the "Global Solutions to Regional Problems: Collecting Global Expertise to Address the Problem of Harmful Algal Blooms" Presented by Cathy Kling April 14, 2015 In addition funding from the USDA-NIFA, Award No , “Climate Change, Mitigation, and Adaptation In Corn- Based Cropping Systems,” additional support was provided by USDA-NIFA Award No and from the National Science Foundation, Awards No. DEB and WSC Fish out of water

Environmental economics Nutrients leaving fields and entering waterways are a classic “externality” Externality = unintended side effect of production that imposes costs on others Overall, people are not as well off as they would be if these effects were incorporated in decision making Can be thought of as "missing market"

Role of environmental economics Demand: benefits of avoiding nutrient over- enrichment Supply: costs of avoiding nutrient over- enrichment Policy Design: design and evaluate policies tol bring these costs and benefits into decisions

Fundamentally interdisciplinary 1.Demand (benefits) come from reducing impacts to ecosystem services: ecological sciences 2.Supply (costs) come from changes in land use and agricultural production: agronomic sciences, hydrology, agricultural engineering, etc. 3.Good policy design depends on physical processes of both prevention methods and ecosystem impacts

Outline 1.Discuss three areas, emphasize role of natural scientists 2.Questions for you that are important for our work 3.Examples of policies implemented 4.Some background on agriculture

Action Taken on Land Change in Water Quality Change in Ecosystem Services Change in Value Action Taken on Land Fertilizer quantity and timing Wetlands, saturated buffers Bioreactors Cover Crops, perennials, etc. Change in Water Quality Nitrogen Phosphorus Sediment Change in Ecosystem Services Fishing, boating, nature viewing Drinking water, swimming Navigation Nonwater related services (carbon, etc.) Change in Value Willingness to Pay (if monetizable) Physical units (if not)

Relationships between water quality change, multiple ecosystem goods and services, and associated changes in values. Bonnie L. Keeler et al. PNAS 2012;109: ©2012 by National Academy of Sciences Demand, benefits Supply, costs Natural Sciences Economic Sciences

Costs of Achieving HAB reductions What are the lowest cost ways to reduce nutrients coming from row crop agriculture? Costs = direct out of pocket expenses + lost yield – lower input costs + increased management time + increased risk + aesthetics

Approaches to Reduce Nutrient Runoff Reduce application/change timing Reduce tillage Buffers Denitrification, controlled drainage Cover crops, rotation changes Wetlands Land retirement (CRP) New technologies?

Tile Drain Landscapes Lowell Busman and Gary Sands

Photos: Matt Helmers Tile drains: Is this a point source? Photo: USDA-ARS

Tile Drainage: A game changer in movement of nutrients from the land to the waterways Source: 2012 US Census of Agriculture

Saturated Buffer Tile drainage into buffer

Land Retirement Panoramic view of gamma grass-big blue stem planting

Optimization of the landscape to achieve specific goals for sediment, nutrients, other a d b a b c a d a b a a a 13 Fields, 4 land use/abatement options: a, b, c, d SWAT: N, P, and Sediment

Solutions mapped in “decision space” Rabotyagov et al. PNAS, Dec 2014

Demand Benefits from Reduced HABs

Value from Ecosystem Services Concept of “Economic Value” applies to all goods – Private, public, nonmarket, market, environment, etc. – Marshall (1890, “Principles of Economics) Premise: people take their personal resources (time, income) and allocate it to make themselves and families as well off as possible – They consider their likes, time, concern for nature, altruism etc. – To do this, they make trade-offs Economic value of a good measures how much people are willing to give up to of other goods to attain or keep the good in question

Methods for Empirically Measuring the Value of Changes in Ecosystem Services 1.Revealed Preference Studies Look for behavior and changes in behavior that reveal tradeoffs Recreation demand studies House prices related to ecosystem amenities Wage studies 2.Stated Preference Studies Direct questioning about tradeoffs Contingent Valuation Choice Experiments

Using Travel Patterns to Reveal Valuation

Stated Preference Question: Would you be willing to pay $25/year in property taxes to support a project to improve the conditions of Storm Lake to those described below?

Ecosystem Services Economists have methods to incorporate the value of these services into Benefit-Cost Analysis Critically depends on natural science, ability to characterize and roughly measure ecosystem services

Ecosystem Service Questions What do nutrients do to other ecosystem services: wildlife? Commercial and recreational fisheries? Mix of species? Flora impacts? Are there potential irreversibilities in the system?

Policy Design Taxes Subsidies Voluntary approaches (not subsidized) Regulations (required practices) Standards (tradable permits) Conservation compliance

Taxes On what? Fertilizer inputs, water quality? Fertilizer taxes – Historically small, used for revenue generation – Much larger would be needed to alter quantity Effectiveness depends on answers tonatural science questions

Subsidies On what? Practices, reductions in pollutants? Major federal subsidy programs (practices) Conservation Reserve Program Wetlands Reserve Program EQIP (working lands) Conservation Security Program EPA 319 funding Lots of state programs

Voluntary Approaches Encouragement of use of BMPs Ex: State Nutrient Reduction Strategies developed under Hypoxia Taskforce – Infield options will only reduce nutrients in water by less than 10% – 90+ percent of crop acreage will need to be treated with cover crops, wetlands, bioreactors or other

Environmental Regulations in Agriculture Nonpoint Sources exempt from Federal Clean Water Act, but states can regulate Winter bans on manure spreading: Vermont, Maine, others NOW Ohio Vegetative buffer requirements: Minnesota, agricultural areas near waterways require 50’ buffer strips --- EWG identified lack enforcement California: zoning and more

Maryland: Chesapeake Bay Spring 2013 All farmers must incorporate organic nutrients into the soil within 48 hours of application. Fall 2013 Farmers are required to plant cover crops when applying organic nutrient sources to fallow ground in the fall. New limits for fall nitrogen applications on small grains take effect for all farmers. January 1, 2014 A 10 to 35 ft. “no fertilizer application zone” must be in place adjacent to surface waters and streams. Pasture management practices must be installed to protect streams. July 1, 2016 Nutrient applications are prohibited between Nov 1 and March 1 for Eastern Shore farmers and between Nov15 and March 1for Western Shore

BMPs: Everglades Agricultural Area Everglades Regulatory Program – goal 25% P reduction overall – mandatory BMPs, 1995 – Implemented via points flexibility in BMPs, 25 points/farm expert judgment set point values must implement and monitor WQ Wikipedia

Natural science questions Which nutrient needs to be reduced, N, P, or both? How much? What time of year? Can we achieve reductions in HABs with reduced application/timing alone? What other conservation actions (BMPs) keep N and P out of waterways? Are there likely to be new conservation actions that can achieve reductions?

Natural science questions How important is it to pay attention to differences across watersheds? Especially heavily tiled? How extensively do these practices need to be implemented to achieved desired reductions

Questions about nutrient reductions critical for policy design Can disproportionate gains accrue from placement of these practices on landscape (geographic targeting)? Will practices that achieve reductions in N and P produce other ecosystem services? What are they? What is their magnitude?

In addition funding from the USDA-NIFA, Award No , “Climate Change, Mitigation, and Adaptation In Corn- Based Cropping Systems,” additional support was provided by USDA-NIFA Award No and from the National Science Foundation, Awards No. DEB and WSC

Some References Champ, Boyle, and Brown. A Primer on Nonmarket Valuation: the Economics of NonMarket Goods and Resources, Kluwer, 2003 Arrow et al. Report of the NOAA Panel on Contingent Valuation, Federal Register 58, 10, January 1993 Batemen and Willis. Valuing Environmental Preferences: Theory and Practice of the Contingent Valuation Method in the US, EU, and Developing Countries. 1999, Oxford Valuing the Protection of Ecological Systems and Services: a Report of the EPA Science Advisory Board, 2009 Carson and Hanemann. “Contingent Valuation,” in Handbook of Environmental Economics, 2005

Carson, bibliography of over 2000 contingent valuation/stated preference studies Haab and McConnell, 2002 Valuing Environmental and Natural Resources, Elgar National Research Council, Valuing Ecosystem Services: Toward Better Environmental Decision-making, National Academies Press Freeman, A. Myrick III, Joseph A. Herriges and Catherine L. Kling. The Measurement of Environmental and Resource Values: Theory and Methods, Third edition, RFF Press, 2014

Maximum Willingness-to-Pay (WTP) Economic Value of a good or service = maximum amount an individual is willing to pay for a good or service – Do people want to pay this? No, but they would rather pay it than be forced to live without the good – Do they have to pay it? No, but would be willing to rather than be forced to do without the good – If they get it for less, then they get surplus. Asides on WTP – Anthropocentric – Values are not intrinsic to a good Units of “energy” or “species richness” intrinsic to a good doesn’t work unless they translate into something valuable to people this DOES NOT mean mere existence preservation of natural world is not valuable (I value it, do you?)