0e879921-850a-4fd4-894f-90ce568a2b66 English HELCOM Secretariat data@helcom.fi 2025-10-20T10:21:51 EPSG:3035 Benthic species 2016-2021 (HOLAS 3) 2023-02-14 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/0e879921-850a-4fd4-894f-90ce568a2b66 Data represent the presence/absence distribution of Benthic species in the Baltic Sea in 1x1km grid. Map is based on data submitted for the HOLAS3 data call and complemented with data from HOLAS2 and HELCOM Biodiversity databases. All datasets are first aggregated to a 5x5km grid and areas deeper than 10m are excluded. For the 5 new species in HOLAS3 (Potamogeton, Myriophyllum, Najas marina, Fontinalis, Callitriche, Zanichellia) only data reported for HOLAS3 and data in the biodiversity database were used. For Mytilus no filtering with depth was made. HELCOM Secretariat data@helcom.fi Habitats and biotopes Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme environment GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS3 ecosystem component benthic species Use constraints: Data can be used freely given that the source is cited (following creative commons license CC-BY). The source should be cited as: “HELCOM HOLAS 3 Dataset (2023). Access constraints: No limitations on public access. English environment biota 7.530661 33.849351 52.45589 66.438436 2016-01-01 2021-12-31 ESRI Shapefile 1.0 https://maps.helcom.fi/website/MADS/download/?id=biodiversity126 WWW:LINK-1.0-http--link Download Charophyte distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity126 WWW:LINK-1.0-http--link View Charophyte distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity127 WWW:LINK-1.0-http--link Download Fucus distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity127 WWW:LINK-1.0-http--link View Fucus distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity128 WWW:LINK-1.0-http--link Download Furcellaria lumbricalis distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity128 WWW:LINK-1.0-http--link View Furcellaria lumbricalis distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity129 WWW:LINK-1.0-http--link Download Mytilus distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity129 WWW:LINK-1.0-http--link View Mytilus distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity130 WWW:LINK-1.0-http--link Download Zostera marina distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity130 WWW:LINK-1.0-http--link View Zostera marina distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity131 WWW:LINK-1.0-http--link Download Potamogeton distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity131 WWW:LINK-1.0-http--link View Potamogeton distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity132 WWW:LINK-1.0-http--link Download Myriophyllum distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity132 WWW:LINK-1.0-http--link View Myriophyllum distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity133 WWW:LINK-1.0-http--link Download Najas marina distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity133 WWW:LINK-1.0-http--link View Najas marina distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity134 WWW:LINK-1.0-http--link Download Fontinalis distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity134 WWW:LINK-1.0-http--link View Fontinalis distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity135 WWW:LINK-1.0-http--link Download Callitriche distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity135 WWW:LINK-1.0-http--link View Callitriche distribution https://maps.helcom.fi/website/MADS/download/?id=biodiversity136 WWW:LINK-1.0-http--link Download Zanichellia distribution https://maps.helcom.fi/website/mapservice/?datasetID=biodiversity136 WWW:LINK-1.0-http--link View Zanichellia distribution 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 All data reported for HOLAS3 (points, polygon and the raster presenting predicted presence of eelgrass in the Estonian waters) were generalized to 5km x 5km grid cells. Data were reported by Denmark, Germany, Estonia and Finland. Same methodology was used for HELCOM biodiversity database data, and years 2000-2021 were selected. For HOLAS2 datasets detailed descriptions can be found in HELCOM Metadata Catalogue. For depth the Emodnet bathymetry 2020 data with resolution 100x100m was used. The original data was transformed to 1x1km grid so that if one 100x100m cell within the 1x1km grid was shallower than 10m, the whole grid cell was indicated as shallower than 10m. Raster datasets were made of all 3 different data sources and summed together. Finally the datasets were filtered with the 10m depth layer.