Jeremy De Valck

Linking water quality impacts and benefits of ecosystem services in the Great Barrier Reef

Water quality degradation in the Great Barrier Reef, associated with increased loads of nutrients, sediments and pesticides from agriculture, has become a major concern. Improved management practices and water quality targets were set in the Reef Plan 2013, but with limited success. The causality between water quality degradation, ecosystem health and benefits to society remains poorly understood, questioning the relevance of current water quality targets. We argue that ecosystem service valuation may help identify the benefits generated by ecosystems and help prioritise further investments in water quality improvement. We estimate the loss of benefits to society resulting from water quality reduction, concentrating on the influence of pollutants on mangroves, seagrass and coral reefs. Our results suggest that failing to meet Governments water quality targets by 1% would result in losses between AU

Spatial Heterogeneity in Stated Preference Valuation: Status, Challenges and Road Ahead

22 k/year and AU

Benefits of clearing forest plantations to restore nature? Evidence from a discrete choice experiment in Flanders, Belgium.

6.9 M/year depending on the industry. We then discuss the implications stemming from these results for local policy-making.

Contrasting collective preferences for outdoor recreation and substitutability of nature areas using hot spot mapping

This paper reviews the progress made over the past few years in evaluating and controlling for spatial heterogeneity in stated preference valuation, focussing on applications to environmental valuation. Spatial heterogeneity can strongly impact value estimates, so failure to account for it can compromise their validity and reliability. Incorporating spatial factors into valuation studies not only helps to control for some potential biases, but also produces more precise evaluation of amenities that have mixed use and non-use values. For these reasons and considering the ever-growing need for non-market valuation studies, spatial heterogeneity deserves more attention in the stated preference valuation literature. In this review we discuss the current state-of-knowledge and identify some of the main issues that have been raised in the literature in relation to spatial heterogeneity in stated preference valuation, including distance-decay, substitution, embedding effects and scale factors. We present several techniques that have been used so far, mostly originating from spatial econometrics and spatial statistics, to control for spatial heterogeneity. Some of the ongoing challenges that require further attention are also highlighted. We conclude by suggesting potential directions for future research in light of recent progress made in related disciplines and the evolution of modern technologies.