0a0b5bcc-d553-4529-88c0-02adafb1bed7 English dataset JNCC marine international evidence and advice queries jncc marine.international@jncc.gov.uk pointOfContact 2026-11-04 MEDIN 3.1.2 EPSG Geodetic Parameter Registry 2021-01-06 revision WGS 84 2026 Joint Nature Conservation Committee (JNCC) Data results from the assessment based on the indicator “Condition of Benthic Habitat Communities” in the Celtic Seas used in the UK Marine Strategy Part One 2026 update DASSHDT00000807 Data results obtained from the calculations of the Condition of Benthic Habitat Communities” indicator. The indicator is based on the Margalef diversity index (i.e., number of species corrected for their abundance) which is calculated at sample level and compared against reference values to obtain a Relative Margalef diversity index and assess the state of benthic habitats. Relative Margalef diversity ranges from 0 to 1, with higher values indicating higher diversity. The median of Relative Margalef diversity values for each assessment group is calculated as the indicator of benthic habitat quality status. Achievement of GES was based on median Relative Margalef diversity of ≥ 0.6, this threshold might be revised in future assessments as further evidence and testing of pressure state relationships become available JNCC marine international evidence and advice queries jncc marine.international@jncc.gov.uk owner JNCC marine international evidence and advice queries jncc marine.international@jncc.gov.uk custodian JNCC marine international evidence and advice queries jncc marine.international@jncc.gov.uk originator JNCC marine international evidence and advice queries jncc marine.international@jncc.gov.uk distributor unknown Marine Environmental Data and Information Network MEDIN metadata record availability 2026-11-04 revision Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2021-09-28 revision Biodiversity indices SeaDataNet Parameter Discovery Vocabulary 2021-09-28 revision otherRestrictions 'Available under Open Government Licence v3.0: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ otherRestrictions Data created by JNCC as part of indicator analysis. No restrictions apply to public access or use of these data. When using or reproducing the data, users should cite the source using the full citation provided in the UK Marine Online Assessment Tool (MOAT): https://moat.cefas.co.uk/biodiversity-food-webs-and-marine-protected-areas/benthic-habitats/relative-margalef-diversity-index/ English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 biota -9.400 -1.470 48.800 60.800 SeaVox salt and freshwater body gazetteer 2021-01-06 creation Celtic Sea 2009-01-01 2021-12-31 Database https://moat.cefas.co.uk/biodiversity-food-webs-and-marine-protected-areas/benthic-habitats/relative-margalef-diversity-index/ UKMS Part One 2026 Update –Assessment of Condition of Benthic Habitat Communities Assessment Report information dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication not evaluated This dataset contains • assessment results: showing Relative Margalef values at sample level and aggregated at broad-scale habitat level and associated diversity level and assessment confidence • supplementary material: including 1) estimated Margalef values at sample level in relation reference values 2) mapped results of Relative Margalef 3) analysis of significant differences in median relative Margalef between assessment periods 4) analysis of spatial representativity of monitored data • R scripts used for the analyses