The seagrass Posidonia oceanica: ecosystem services identification and economic evaluation of goods and benefits
2015
Campagne, Carole Sylvie | Salles, Jean-Michel | Boissery, Pierre | Deter, Julie | Andromède Océanologie | Laboratoire Montpelliérain d'Économie Théorique et Appliquée (LAMETA) ; Université Montpellier 1 (UM1)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Centre National de la Recherche Scientifique (CNRS) | Agence de l'eau Rhône Méditérranée Corse | Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)
Posidonia oceanica is a marine angiosperm endemic from the Mediterranean. Despite their protection, its meadows are regressing. The economic valuation of ecosystem services (ES) assesses the contribution of ecosystems to human well-being and may provide local policy makers help in territorial development. To estimate the economic value of P. oceanica seagrass and the meadows that it forms to better account its presence in coastal development, identification and assessment of ES provided are first performed. Then goods and benefits (GB) and their economical values are estimated. In total, 25ES are identified and 7 GB are economically evaluated. The economic value of GB provided by P. oceanica ranges between 25.3 mil- lion and 45.9 million €/year which means 283–513 €/ha/year. Because of the lack of existing available data, only 7 GB linked to 11/25ES have been estimated. Despite this overall undervaluation, this study offers a value for coastal development policies to take into account.
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