Assessing and forecasting the effects of submersion on biodiversity. A method to implement an ecological-quality indicator in a context of coastal realignment and rising sea levels - BRGM - Bureau de recherches géologiques et minières Access content directly
Journal Articles Ecological Indicators Year : 2022

Assessing and forecasting the effects of submersion on biodiversity. A method to implement an ecological-quality indicator in a context of coastal realignment and rising sea levels

Marianne Debue
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  • PersonId : 1232220
Lucille Billon
Rémy Poncet
Yorick Reyjol
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  • PersonId : 1264155

Abstract

In the context of climate change and sea-level rise, coastal realignment consists in reopening polders to marine waters to favor 'nature-based' mitigation measures. Such operations have consequences on biodiversity, which vary depending on the parameters studied and site features. In this study, a multimetric indicator aiming to evaluate and predict the potential ecological quality of sites undergoing a realignment operation was developed. This indicator is based on the combination of two tools, (i) a biological-capacity matrix to assess the importance of different habitats of a defined typology for taxonomical, patrimonial and functional parameters; (ii) habitat maps obtained by photointerpretation for past habitats, by machine learning using space-borne imagery for present habitats and by forecasting using submersion models for future habitats. The indicator is presented in the form of a radar chart, with each axis corresponding to one parameter of the biological-capacity matrix and highlighting its different values for different coastal-realignment scenarios or different time horizons.
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Dates and versions

hal-03844486 , version 1 (08-11-2022)

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Attribution - NonCommercial - NoDerivatives

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Marianne Debue, Lucille Billon, Olivier Brivois, Rémy Poncet, Yorick Reyjol. Assessing and forecasting the effects of submersion on biodiversity. A method to implement an ecological-quality indicator in a context of coastal realignment and rising sea levels. Ecological Indicators, 2022, 142, pp.109216. ⟨10.1016/j.ecolind.2022.109216⟩. ⟨hal-03844486⟩
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