4d319fab-02f5-46f1-bf85-da3fafaa82cd English HELCOM Secretariat data@helcom.fi 2023-03-18T03:50:01 EPSG:3035 Seasonal succession of dominating phytoplankton groups 2018 (HOLAS 2) 2018-06-28 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/4d319fab-02f5-46f1-bf85-da3fafaa82cd The indicator evaluates the coincidence of seasonal succession of dominating phytoplankton groups over an assessment period (commonly 5-6 years) using regionally established reference seasonal growth curves and wet weight biomass data. The indicator result value is based on the number of data points falling within the acceptable deviation range set for each monthly point of the reference growth curve and expressed as the percentage to the total number of data points. This result value is then compared to regionally relevant threshold values established to represent acceptable levels of variation. Strong deviations from the reference growth curves will result in failure to meet the thresholds set for acceptable variation, indicating impairment of the environmental status and a failure to meet good status. Seasonal succession of dominating phytoplankton groups displays the result of the indicator in HELCOM Assessment Scale 3 (Division of the Baltic Sea into 17 sub-basins and further division into coastal and offshore areas). Attribute information: "HELCOM_ID" = HELCOM ID of the HELCOM scale 3 assessment unit "country" = Country "level_2" = Name of HELCOM scale 2 assessment unit "level_3" = Name of HELCOM scale 3 assessment unit "Area (km2)" = Area of HELCOM assessment unit "Overall Score" = Indicator value or result "Info" = additional info "AULEVEL" = Assessment unit level used for the indicator "Status" = Status of the indicator (“Achieve”, “Fail” or “Not assessed”) "Assessment" = Assessment unit name "Reference period" = Reference period(s) "Threshold value" = Threshold value (overall) "Indicator cyanobacteria" = Indicator value for cyanobacteria "Indicator dinoflagellates" = Indicator value for dinoflagellates "Indicator diatoms" = Indicator value for diatoms "Indicator Mesodinium rubrum" = Indicator value for Mesodinium rubrum "Indicator green algae" = Indicator value for green algae HELCOM Secretariat data@helcom.fi Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS HOLAS2 2018 Core indicator Core indicator 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 (2018) Seasonal succession of dominating phytoplankton groups. Online. [Date Viewed], [Web link].” Access constraints: No limitations on public access. English environment 7.526438 33.796674 52.535858 66.424283 2011-01-01 2016-12-31 ESRI Shapefile 1.0 https://maps.helcom.fi/website/MADS/download/?id=4d319fab-02f5-46f1-bf85-da3fafaa82cd WWW:LINK-1.0-http--link Download dataset https://maps.helcom.fi/website/mapservice/?datasetID=4d319fab-02f5-46f1-bf85-da3fafaa82cd WWW:LINK-1.0-http--link Open in Map Viewer 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 The methods of collection, counting and identification should be unified between all laboratories sharing the same assessment area. Data has been collected directly from the persons responsible for phytoplankton monitoring, no common database was currently used. Currently the HELCOM COMBINE database hosted by ICES does not contain biomass values of dominating groups and is thus unsuitable. The indicator can be updated either annually or for specific periods (e.g. for certain 6-year assessment periods) to detect reliable trends in seasonal dynamics on dominant phytoplankton groups. Additional information: http://www.helcom.fi/baltic-sea-trends/indicators/seasonal-succession-of-dominating-phytoplankton-groups Link to metadata of dataset used for indicator calculation: http://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/70bbf55c-f227-423c-9f54-5f163b0ec239