Mappatura degli habitat bentonici dei canali di marea della Laguna di Venezia tramite strumenti acustici e tecniche di ground-truth

Lahami, Taha (2022) Mappatura degli habitat bentonici dei canali di marea della Laguna di Venezia tramite strumenti acustici e tecniche di ground-truth. [Laurea magistrale], Università di Bologna, Corso di Studio in Biologia marina [LM-DM270] - Ravenna, Documento full-text non disponibile
Il full-text non è disponibile per scelta dell'autore. (Contatta l'autore)


The Venice Lagoon is a complex, heterogeneous and highly dynamic system, subject to anthropogenic and natural pressures that deeply affect the functioning of this ecosystem. Thanks to the development of acoustic technologies, it is possible to obtain maps with a high resolution that describe the characteristics of the seabed. With this aim, a high resolution Multibeam Echosounder (MBES) bathymetry and backscatter survey was carried out in 2021 within the project Research Programme Venezia 2021. Ground-truthing samples were collected in 24 sampling sites to characterize the seafloor and validate the maps produced with the MBES acoustic data. Ground-truthing included the collection of sediment samples for particle size analysis and video footage of the seabed to describe the biological component. The backscatter data was analysed using the unsupervised Jenks classification. We created a map of the habitats integrating morphological, granulometric and biological data in a GIS environment. The results obtained in this study were compared to those collected in 2015 as part of the National Flagship Project RITMARE. Through the comparison of the repeated morpho-bathymetric surveys over time we highlighted the changes of the seafloor geomorphology, sediment, and habitat distribution. We observed different type of habitats and the presence of areas characterized by erosive processes and others in which deposition occurred. These effects led to changes in the benthic communities and in the type of sediment. The combination of the MBES surveys, the ground truth data and the GIS methodology, permitted to construct high-resolution maps of the seafloor and proved to be effective implement for monitoring an extremely dynamic area. This work can contribute not only to broaden the knowledge of transitional environments, but also to their monitor and protection.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Lahami, Taha
Relatore della tesi
Correlatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
Habitat mapping, Laguna di Venezia, Multibeam echo-sounder
Data di discussione della Tesi
14 Luglio 2022

Altri metadati

Gestione del documento: Visualizza il documento