Relationships between multibeam backscatter, sediment grain size, and Posidonia oceanica seagrass distribution (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Relationships between multibeam backscatter, sediment grain size, and Posidonia oceanica seagrass distribution (Articolo in rivista) (literal)

Anno

• 2010-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/j.csr.2010.09.006 (literal)

Alternative label

• De Falco G.; Tonielli R.; Di Martino G.; Innangi S.; Simeone S.; Parnum I.M.. (2010)
  Relationships between multibeam backscatter, sediment grain size, and Posidonia oceanica seagrass distribution
  in Continental shelf research
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• De Falco G.; Tonielli R.; Di Martino G.; Innangi S.; Simeone S.; Parnum I.M.. (literal)

Pagina inizio

• 1941 (literal)

Pagina fine

• 1950 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

• http://www.sciencedirect.com/science/article/pii/S0278434310002785 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 30 (literal)

Rivista

• Continental shelf research (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

• 10 (literal)

Note

• Scopu (literal)
• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Giovanni De Falco a, Renato Tonielli b, Gabriella Di Martino b, Sara Innangi b, Simone Simeone c, Iain Michael Parnum d a Istituto per l'Ambiente Marino Costiero, IAMC-CNR, UO Oristano, Localit?a Sa Mardini, 09072 Torregrande, Oristano, Italy b Istituto per l'Ambiente Marino Costiero, IAMC-CNR Sede, Calata Porta di Massa-Porto di Napoli, 80133 Napoli, Italy c Fondazione IMC, Centro Marino Internazionale ONLUS, Localit?a Sa Mardini, 09072 Torregrande, Oristano, Italy d Centre for Marine Science and Technology, Curtin University, GPO Box U1987, Perth, WA 6845, Australia (literal)

Titolo

• Relationships between multibeam backscatter, sediment grain size, and Posidonia oceanica seagrass distribution (literal)

Abstract

• The use of data, including bathymetry, backscatter intensity and the angular response of backscatter intensity, collected using multibeam sonar (MBS) systems to recognise seabed types was evaluated in the inner shelf of central western Sardinia (western Mediterranean sea), a site characterised by a complex seabed including sandy and gravelly sediments, Posidonia oceanica seagrass beds growing on hardgrounds (i.e. biogenic carbonates) and sedimentary substrates. A MBS survey was carried out in order to collect bathymetric and acoustic backscatter data. Groundtruth data in the form of grab samples and diver observations were collected at 57 stations, 41 of which were in non-vegetated sedimentary substrate and 16 of which were in P. oceanica beds. Sediment samples were analysed for grain size. Statistical comparison between MBS backscatter and grain size data showed that backscatter intensity is strongly affected by sediment grain size, being directly correlated to the weight percent of the coarse fraction (1-16 mm) and inversely correlated to weight percent of the finer sediments (0.016-0.5 mm). Factor analysis of grain size and acoustic data identified three sedimentary facies: sandy gravels (SG), gravelly sands (GS) and slightly gravelly muddy sands (SGMS). Each facies showed different acoustic responses in terms of backscatter intensity and shape of the angular response curves. Differences in backscatter intensity among five seabed types, including the three sediment types identified by factor analysis and P. oceanica beds, growing on hardgrounds and sedimentary substrates, were tested by analysis of variance. P. oceanica on hardgrounds, P. oceanica on sedimentary substrates and GS exhibited values of relative backscatter intensity within the same range and, consequently, it was not possible to distinguish Posidonia beds and gravelly sands only on the basis of backscatter data. The similarity of backscatter intensity from P. oceanica growing on different substrates suggests that the acoustic response is mainly linked to the leaf canopy rather than the substrate it is growing on. A map of seabed classification, including sediment types and seagrass distribution was produced through a combination of information derived from backscatter data and morphological features derived from multibeam bathymetry, which were validated by ground-truth data. (literal)

Prodotto di

• Studio e gestione degli habitat marino-costiero e delle specie protette (TA.P05.017.003) (Modulo)
• Ecofisiologia e comportamento di organismi marini (TA.P05.017.001) (Modulo)
• Institute for coastal marine environment (IAMC) (Istituto)

Autore CNR

• SARA INNANGI (Persona)
• GIOVANNI DE FALCO (Unità di personale interno)
• RENATO TONIELLI (Unità di personale interno)
• SIMONE SIMEONE (Persona)
• GABRIELLA DI MARTINO (Persona)

Insieme di parole chiave

• Parole chiave di "Relationships between multibeam backscatter, sediment grain size, and Posidonia oceanica seagrass distribution" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute for coastal marine environment (IAMC) (Istituto)
• Ecofisiologia e comportamento di organismi marini (TA.P05.017.001) (Modulo)
• Studio e gestione degli habitat marino-costiero e delle specie protette (TA.P05.017.003) (Modulo)

Autore CNR di

• RENATO TONIELLI (Unità di personale interno)
• GIOVANNI DE FALCO (Unità di personale interno)
• GABRIELLA DI MARTINO (Persona)
• SIMONE SIMEONE (Persona)
• SARA INNANGI (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Continental shelf research (Rivista)

Insieme di parole chiave di

• Parole chiave di "Relationships between multibeam backscatter, sediment grain size, and Posidonia oceanica seagrass distribution" (Insieme di parole chiave)