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Resilience indicators support valuation of estuarine ecosystem restoration under climate change

Ecosystem Health and Sustainability 2017年第4期3卷 15-33页

作者： L.A.Wainger D.H.Secor C.Gurbisz W.M.Kemp P.M.Glibert E.D.Houde J.Richkus M.C.Barber Chesapeake Biological Laboratory University of Maryland Center for Environmental ScienceP.O.Box 38SolomonsMaryland 20688 USA Horn Point Laboratory University of Maryland Center for Environmental ScienceP.O.Box 775CambridgeMaryland 21613 USA National Socio-Environmental Synthesis Center 1 Park PlaceSuite 300AnnapolisMD 21401 USA RTI International 70113th St.NWSuite 750WashingtonD.C.20005 USA

Economic valuation of ecological restoration most often encompasses only the most tangible ecosystem service benefits,thereby omitting many difficult-to measure benefits,including those derived from enhanced reliability of ecosystem *** climate change is likely to impose novel ecosystem stressors,a typical approach to valuing benefits may fail to capture the contribution of ecosystem resilience to sustaining long-term ***,we generally lack predictive probabilistic models that would enable measurement and valuation of ***,alternative measures are needed to complement monetary values and broaden understanding of restoration *** use a case study of Chesapeake Bay restoration(total maximum daily load)to show that ecosystem service benefits that are typically monetized leave critical information *** address these gaps,we review evidence for ecosystem services that can be quantified or described,including changes in harmful algal bloom *** further propose two integrative indicators of estuarine resilience-the extent of submerged aquatic vegetation and spatial distribution of *** aquatic vegetation extent is indicative of qualities of ecosystems that promote positive feedbacks to water *** distributed fish populations reduce risk by promoting diverse responses to spatially heterogeneous *** synthesis and new analyses for the Chesapeake Bay suggest that resilience metrics improve understanding of restoration benefits by demonstrating how nutrient and sediment load reductions will alleviate multiple sources of stress,thereby enhancing the system’s capacity to absorb or adapt to extreme events or novel stresses.

关键词： benefit-relevant indicators climate change economic valuation ecosystem services non-monetary benefit indicators resilience total maximum daily load water quality.

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