Details of Seagrass Meadows in The Greek Seas


Dataset identification

Title of datasetSeagrass Meadows in The Greek Seas
Narrative summary of datasetCombined use of optical (satellite imagery), and acoustic (sidescan sonar) remote sensing techniques, as well as in situ methodologies (visual census; SCUBA diving, Towed Underwater Cameras, and Remotely Operated Vehicles) was employed to map the spatial distribution of seagrass habitats in the coastal waters of the Hellenic territory. Seagrass meadows were recorded at approximately 70% of the Hellenic coastline (Eastern Ionian, Aegean and Levantine Seas), and their surface area exceeded 2,673.1 km2. Posidonia oceanica is -by far- the dominant seagrass species of the Hellenic seas, covering the vast majority of seabed at depths between the shoreline and 25 – 30 m (or deeper in insular areas), followed by the species Cymodocea nodosa, Zostera noltei, and Halophila stipulacea, which, however, presenting local presence and limited areal extent. Habitat suitability in terms of the seabed spatial extent that is available for the growth of seagrass meadows (i.e., the spatial extent of coastal areas between the shoreline and the isobath of 20m) and the seawater clarity conditions are highlighted as the critical factors for the formation of well-structured and extensive meadows. The results of this study are of great importance and usefulness for the effective management and conservation of valuable marine ecosystems. Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.
Start date2000-01-01
End date2021-01-01

Responsible organisations

Organisation nameIfremer, Scientific Information Systems for the sea
Role of organisationDataset Holding Organisation
Organisation nameSEA scieNtific Open data Edition
Role of organisationPublisher
How to citePanayotidis Panayiotis, Papathanasiou Vasillis, Gerakaris Vasilis, Fakiris Elias, Orfanidis Sotiris, Papatheodorou Georgios, Kosmidou Maria, Georgiou Nikos, Drakopoulou Paraskevi, Loukaidi Vasiliki (2022). Seagrass Meadows in The Greek Seas. SEANOE.

Dataset availability

Original dataset download link
Dataset formatGeographic Information System
Public accessNo limitations
License for useCC-BY 4.0
Link to dataset after processing by data centre


Latitude north boundary41.845115
Longitude east boundary29.188957
Latitude south boundary34.443272
Longitude west boundary19.301261
Sea areaMediterranean Sea, Eastern Basin
Ionian Sea
Aegean Sea

Data types, collection and processing

Observation typeHabitat
Macroalgae and seagrass
ParameterHabitat extent
Seabed photography
Side-scan sonar
Instrument typesidescan sonars
Platform typeorbiting satellite

Process information

Submitting organisationHellenic Centre for Marine Research, Institute of Oceanography
Submission identifier (UUID)a53ad03f-3837-8373-3737-000000087740
Date of dataset creation2022-04-19
Date of dataset revision2022-04-28
Date of metadata creation2022-5-9
Date of metadata latest revision2022-06-10
Date of publishing2022-06-26
Date of processed dataset publication2023-04-03
Processing data centreHellenic Centre for Marine Research, Hellenic National Oceanographic Data Centre
Summary record-ID1066