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Swinging boat moorings: Spatial heterogeneous damage to eelgrass beds in a tidal ecosystem ArchiMer
Ouisse, Vincent; Marchand-jouravleff, Irina; Fiandrino, Annie; Feunteun, Eric; Ysnel, Frederic.
Seagrass meadows are currently known to be subjected to huge physical disturbances including boat moorings in shallow bays. We aimed to identify the impact of permanent swing mooring on the fast-growing seagrass Zostera marina in a mega-tidal area. Coupling the hydrodynamic MARS3D model to simulate mooring chain movements and in situ measurements of plant traits, we analyzed the structural responses of the eelgrass bed to scraping disturbance in the western English Channel (France). A comparison of the results with a reference site without any permanent swing boat mooring showed a significant impact on eelgrass structure (shoot density, leaf size, leaf dry weight), depending on the direction and distance from the mooring. Zostera marina was absent close to...
Tipo: Text Palavras-chave: Boat mooring; Zostera marina; Seagrass ecology; Anthropogenic disturbances; SCUBA-Diving; Modeling approach.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00599/71151/69553.pdf
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