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Assessing the coastal protection services of natural mangrove forests and artificial rock revetments

Strain, EMA ORCID: 0000-0003-2165-9544, Kompas, T, Boxshall, A, Kelvin, J, Swearer, S and Morris, RL 2022 , 'Assessing the coastal protection services of natural mangrove forests and artificial rock revetments' , Ecosystem Services, vol. 55 , pp. 1-10 , doi: 10.1016/j.ecoser.2022.101429.

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Abstract

Coastal flooding and erosion cause significant social and economic impacts, globally. There is a growing interestin using natural habitats such as mangroves to defend coastlines. The protective services of mangroves, however,have not been assessed in the same rigorous engineering and socio-economic terms as rock revetments, andtherefore are often overlooked by coastal managers. We used field measurements, a social science survey andeconomic valuation to compare the coastal protection services of mangroves and rock revetments, at five locationsacross Victoria, Australia. The results showed, in sheltered locations, both mangroves and rock revetmentsattenuated waves, however, the wave attenuation (per metre) of rock revetments was greater than mangroves, attwo of the five locations. Only a small proportion of the survey respondents had observed flooding or erosion intheir suburb but most agreed that mangroves provide important coastal protection benefits. Coastal landownersvisited areas with mangroves more often than the public but were less likely to worry about the links between climatechange and coastal erosion and flooding, or to agree that the coast was well protected with existing artificialcoastal infrastructure, than other respondents. There were much higher up-front costs associated with buildingrock revetments, than planting mangroves, but rock revetments required less land than mangroves. Mangrovescovered a larger area and averted more damages than rock revetments. Coastal managers and policy makerswill have more success in advocating for nature-based solutions for coastal protection, if they are implementedin locations where they are eco-engineering and socio-economically acceptable options for climatechange adaptation.

Item Type: Article
Authors/Creators:Strain, EMA and Kompas, T and Boxshall, A and Kelvin, J and Swearer, S and Morris, RL
Keywords: mangroves, rock revetments, multi-disciplinary, Avicennia marina, coastal infrastructure, coastal protection, eco-engineering, social science, economic valuation
Journal or Publication Title: Ecosystem Services
Publisher: Elsevier Science Bv
ISSN: 2212-0416
DOI / ID Number: 10.1016/j.ecoser.2022.101429
Copyright Information:

© 2022 Elsevier B.V. All rights reserved.

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