Assessing the ecological status of an estuarine ecosystem: linking biodiversity and food-web indicators

TitleAssessing the ecological status of an estuarine ecosystem: linking biodiversity and food-web indicators
Publication TypeJournal Article
Year of Publication2019
AuthorsLe Guen, C, Tecchio, S, Dauvin, J-C, De Roton, G, Lobry, J, Lepage, M, Morin, J, Lassalle, G, Raoux, A, Niquil, N
JournalEstuarine, Coastal and Shelf Science
KeywordsBiodiversity, bioindicator, community composition, ecological approach, ecological modeling, ecosystem function, ecosystem health, environmental assessment, estuarine ecosystem, food web, France, habitat management, health status, human activity, Le Havre, Normandie, Seine Estuary, Seine Maritime

During the last decades, the highly-anthropized Seine estuary has been impacted by modification of its habitats (building of a major extension of Le Havre harbour, i.e. Port2000) and a significant natural decrease in freshwater discharge. A Before/After analysis, using a toolbox of indicators, was applied to characterize the effects of both events on the estuarine ecosystem status. We selected from existing tool boxes several indicators derived from food web modelling or community composition data, such as biodiversity indicators, a guild-based index (i.e. Estuarine and Lagoon Fish Index ELFI) and ecological network analysis (ENA) indices. ENA and biodiversity indicators were applied on six spatial boxes describing the Seine estuary and its outlet. Results showed an increase in taxonomic and functional richness over time, mainly due to marinisation, and significant changes in food-web properties in relation to Port2000. ENA indices appeared as a promising method in ecological status assessment, especially for estuaries considered as inherently disturbed. © 2019 Elsevier Ltd

Catégorie HCERES
ACL - Peer-reviewed articles
Publication coopération et recherche SUD