The dataset contains sand and gravel extraction activity during 2016–2021. The dataset is based on data submitted by HELCOM Contracting Parties in response to a data call. The dataset contains active sand and gravel extraction sites as reported by Estonia, Finland and Germany. Attribute specification and units with predefined values specified from the data call Name: Name of the extraction site Area: Area where the activity is taking place in km2 amount2016 - 2021: Amount of extraction reported per year in tonnes or/and m3 Depth: Metres per event Category: Recurrence of the extraction (one-time, recurring event) Start_day: Start day of the dredging activity Start_mont: Start month of the dredging activity Start_year: Start year of the dredging activity End_day: End day of the dredging activity End_month: End month of the dredging activity End_year: End year of the dredging activity Sediment: Type of sediment extracted (mud, sand, hard substrate, mixed sand, other) Method: Method used in the extraction (digging/dredging device (open, enclosed), suction device, other) Notes: notes regarding the reported data

This core indicator evaluates the status of the marine environment based on the reproductive status of seals in the Baltic Sea. Quantitative thresholds are used to evaluate if core indicators status is Achieve, Fail or Not assessed. Good status is achieved when the annual reproductive rate (i.e. pregnancy/birth rate) is at least 90% for five years and older (harbour seals) and six years and older (grey and ringed seals). Currently, a full status evaluation has only been carried out for the grey seal based on Finish and Swedish data. The indicator is applicable for all species of seals and marine mammals that occur in the Baltic Sea, however the amount of data have so far been insufficient for an evaluation of other marine mammal species. This dataset displays the result of the indicator in HELCOM Assessment Scale 1 (Whole Baltic). Attribute information: "Species" = Species "CODE" = Code of the assessment unit "Assessment" = Assessment unit name "Threshold" = Threshold value of core indicator "Result value" = Result value of core indicator "Binomial proportion confidence interval" "Status" = Status for the whole indicator "Notes" = Additional information "AULEVEL" = Assessment unit level used for the indicator "ConfA" = Confidence of classification "ConfT" = Temporal confidence of classification "ConfS" = Spatial confidence of classification "ConfM" = Methodological confidence of classification

This dataset displays coastal fish monitoring points as defined by HELCOM FISH-PRO group and stored in HELCOM Coastal fish database (COOL). Monitoring of coastal fish contains two geometry types: Monitoring points for pointwise locations, where CPUE is reported per point and monitoring areas where CPUE is reported per monitoring area (ICES subdivision or square).

The dataset contains the number of hunted seals per species (ringed, harbour, and grey) per county/municipality as reported by the Contracting Parties for the period 2016-2021. The data was made available by HELCOM Contracting Parties in response to a data call. The data was reported by Denmark, Estonia, Finland, and Sweden. The activity was declared as not relevant in Germany, Latvia and Poland. Attribute specification and units: Area: Name of the area given by the national data provider DesArea: Unit area Grey_2016-Grey_2021: Number of individuals per year (2016 – 2021) for grey seals Harb_2016-Harb_2021: Number of individuals per year(2016 – 2021) for harbour seals Ring_2016-Ring_2021: Number of individuals per year (2016 – 2021) for ringed seals Notes: Notes regarding the data grey_avg: average of the number of individuals per year ringed_avg: average of the number of individuals per year harbo_avg: average of the number of individuals per year

Furcellaria areas of production remained the same since the HELCOM Second Holistic Assessment of the Ecosystem health of the Baltic Sea (HOLAS 2). The production figures were extracted from EUROSTAT. Data contain data for the period 2016-2020 for Estonia. Attribute specification and units: Dredged_ar: Furcellaria dredging area (km2, ND = no data available) Total: Amount (Sum) of dredged Furcellaria during the period (tonnes) Average: Calculated annual average of the amount of dredged Furcellaria (tonnes/year) Area_km2: Area (fishing area) within dredging occurs (km2), area do not represent actual dredging area. F2016 - F2020: Amount of dredged Furcellaria (tonnes / year)

Observations of Coregonus albula were collected from the Baltic Sea area for HELCOM Red List species list. The HELCOM Red List of Baltic Sea species in danger of becoming extinct (2013) is the first threat assessment for Baltic Sea species that covers all marine mammals, fish, birds, macrophytes (aquatic plants), and benthic invertebrates, and follows the Red List criteria of the International Union for Conservation of Nature (IUCN). Almost 2800 species were considered in the Red List assessment and about 1750 were evaluated according to the IUCN Red List criteria. Coregonus albula has been placed to the Red List category of Least Concern (LC) species. The map shows the sub-basins in the HELCOM area where the species is known to occur regularly and to reproduce (HELCOM 2012).

Observations of Entelurus aequoreus were collected from the Baltic Sea area for HELCOM Red List species list. The HELCOM Red List of Baltic Sea species in danger of becoming extinct (2013) is the first threat assessment for Baltic Sea species that covers all marine mammals, fish, birds, macrophytes (aquatic plants), and benthic invertebrates, and follows the Red List criteria of the International Union for Conservation of Nature (IUCN). Almost 2800 species were considered in the Red List assessment and about 1750 were evaluated according to the IUCN Red List criteria. Entelurus aequoreus has been placed to the Red List category of Least Concern (LC) species. The map shows the sub-basins in the HELCOM area where the species is known to occur regularly and to reproduce (HELCOM 2012).

This dataset describes fishing intensity for OT MIX CRU DMF mobile bottom contacting gear in 2010 based on VMS/Log book data processed by ICES Working Group on Spatial Fisheries Data (WGSFD). ICES secretariat collected during 2017 relevant VMS and logbook data for 2009-2016 to produce, as a technical service to HELCOM, updated spatial data layers on fishing intensity/pressure. Improved data quality control checks were implemented. Submitted data across the HELCOM area have improved in quality compared to previous data 2009-2013 published in 2015. Standardized methods were used to produce the requested data layers. The code used to create the data products is available here: https://github.com/ices-eg/wg_WGSFD For further technical information on the advice request, see http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2017/Special_requests/helcom.2017.18.pdf HELCOM secretariat did the following processing to the shapefile provided by ICES: - Conversion to ETRS89LAEA coordinate system - Added feature and attribute "Reported" to display unreported areas. Dataset attribute information: c-square: Unique reference of the c-square polygon Year: Year of fishing activity mid_lat: latitude coordinate of the centroid of c-square inWGS84 decimal degrees mid_lon: longitude coordinate of the centroid of c-square inWGS84 decimal degrees SurfaceSAR: Surface area ratio (Swept area, < 2 cm penetration depth of the gear components) Subsurface: Subsurface area ratio (Swept area, subsurface =>2 cm penetration depth of the gear components) totweight: Total Weight (kg) totvalue: Total value (Euros) Kw Fishing Hours: (Kw*h) Fishing hours: (h) Reported: Yes=Reported data. No= No reported data (area that does not contain effort/intensity value due to lack of reported data). Please note that this dataset was updated (v2) in January 2019, see further details below in the lineage section.

This dataset represents the underlying data on core indicator Zooplankton mean size and total stock (MSTS). The core indicator evaluates zooplankton community structure to determine whether it reflects good environmental status. The dataset contains following attributes: "Country" = Country "Assessment" = Name of HELCOM Level 2 assessment unit "Year" = Year of observation "Station" = Sampling station name "Latitude" = Latitude (WGS84 deicmal degrees) "Longitude" = Longitude (WGS84 deicmal degrees) "Sampling_t" = Sampling date and time "Mean_size" = Mean size (microg / individual) "Total_biom" = Total biomass (mg/m3) "Data_origi" = Data source organization "National_m" = National monitorig data (Yes/No) "Use_restri" = Data use restrictions (Yes/No)

This dataset describes fishing intensity for surface mobile bottom contacting gear in 2013 based on VMS/Log book data processed by ICES Working Group on Spatial Fisheries Data (WGSFD). ICES secretariat collected during 2017 relevant VMS and logbook data for 2009-2016 to produce, as a technical service to HELCOM, updated spatial data layers on fishing intensity/pressure. Improved data quality control checks were implemented. Submitted data across the HELCOM area have improved in quality compared to previous data 2009-2013 published in 2015. Standardized methods were used to produce the requested data layers. The code used to create the data products is available here: https://github.com/ices-eg/wg_WGSFD For further technical information on the advice request, see http://www.ices.dk/sites/pub/Publication%20Reports/Advice/2017/Special_requests/helcom.2017.18.pdf HELCOM secretariat did the following processing to the shapefile provided by ICES: - Conversion to ETRS89LAEA coordinate system - Added feature and attribute "Reported" to display unreported areas. Dataset attribute information: c-square: Unique reference of the c-square polygon Year: Year of fishing activity mid_lat: latitude coordinate of the centroid of c-square inWGS84 decimal degrees mid_lon: longitude coordinate of the centroid of c-square inWGS84 decimal degrees SurfaceSAR: Surface area ratio (Swept area, < 2 cm penetration depth of the gear components) Subsurface: Subsurface area ratio (Swept area, subsurface =>2 cm penetration depth of the gear components) totweight: Total Weight (kg) totvalue: Total value (Euros) Kw Fishing Hours: (Kw*h) Fishing hours: (h) Reported: Yes=Reported data. No= No reported data (area that does not contain effort/intensity value due to lack of reported data). Please note that this dataset was updated (v2) in January 2019, see further details below in the lineage section.