Details of Cymodocea nodosa in the slovenian coastal area


Dataset identification

Title of datasetCymodocea nodosa in the slovenian coastal area
Narrative summary of datasetIn the Mediterranean region Cymodocea nodosa is widely distributed throughout shallow sites. Therefore, a correct assessment of the status of its meadows is of great importance for the implementation of the Water Framework Directive (WFD), the Marine Strategy Framework Directive (MSFD), and the Habitat Directive (HD), especially for areas where Posidonia oceanica meadows (the most frequently used indicator in the Mediterranean Sea) are rare or not present. The previously proposed index for the evaluation of the status of C. nodosa meadows (CymoSkew) is based on ln-transformed relative frequencies of photosynthetic leaf lengths, which we believe is statistically questionable. Therefore, we further improved the methodology and developed a new index named MediSkew, where ln-transformation is applied to raw data of leaf lengths. More specifically, the index is a combination of two metrics, both based on C. nodosa leaf length: deviation from the reference median length (Medi-) and skewness of the length frequency distribution (-Skew), though greater importance was assigned to the first. To develop the classification criteria for the assessment of the status, also a Pressure Index for Seagrass Meadows (PISM), for the evaluation of pressure–impact relationships, was developed. The MediSkew is meant to be a rapid screening method for wide areas, therefore the index should be tested for the assessment of the status of C. nodosa meadows throughout Mediterranean coastal waters. Martina Orlando-Bonaca, Janja Francé, Borut Mavric, Mateja Grego, Lovrenc Lipej, Vesna Flander-Putrle, Milijan Šiško, Annalisa Falace, A new index (MediSkew) for the assessment of the Cymodocea nodosa (Ucria) Ascherson meadow's status, Marine Environmental Research, Volume 110, 2015, Pages 132-141, ISSN 0141-1136, (
Start date2009-06-11
End date2010-06-24

Responsible organisations

Organisation nameNational Institute of Biology, Marine Biology Station
Role of organisationDataset Holding Organisation
Organisation nameNational Institute of Biology, Marine Biology Station
Role of organisationOriginator of Dataset

Dataset availability

Original dataset download link
Date of original dataset publication2019-03-29
Dataset formatDocuments
Public accessNo limitations
License for usePDDL
Link to dataset after processing by data centre


Latitude north boundary45.59415
Longitude east boundary13.71988333
Latitude south boundary45.48201667
Longitude west boundary13.5682
Coordinate reference systemWorld Geodetic System 84
Sea areaAdriatic Sea

Data types, collection and processing

Observation typeHabitat
Macroalgae and seagrass
Biota abundance, biomass and diversity
ParameterMacroalgae and seagrass taxonomy-related counts
Biodiversity indices
Habitat characterisation
Instrument typemanual biota samplers
Platform typeresearch vessel
Platform nameSagita

Process information

Submitting organisationNational Institute of Biology, Marine Biology Station
Submission identifier (UUID)41c19e24-23fc-4cb0-ab2f-419c9b30ff39
Date of dataset creation2019-03-26
Date of metadata creation2019-03-28
Date of metadata latest revision2019-03-28
Date of publishing2019-03-29
Date of processed dataset publication2020-02-19
Processing data centreNational Institute of Biology, Marine Biology Station
Summary record-ID443