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Long-term monitoring

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    The survey existed since 1968. It is carried out every 3 years in the north eastern Atlantic. The year after the Atlantic survey, a mackerel egg survey is conducted in the North Sea. The survey creates a basis for the stock assessment of Atlantic and North Sea mackerel and management plan for Atlantic horse mackerel. The historical MEGS data is expected to be uploaded in 2015-2016. The group responsible for the survey is WGMEGS.

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    Biodiversity of macrozoobenthos of German Baltic waters between Fehmarn and Usedem, literature data from 1839 to 2001

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    Data collected within various monitoring programmes and surveys. Standard zoobenthos techniques using benthic grabbers and species analyses for counts and weights on species level.

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    Long term measurements of phytoplankton composition in the Dutch national part of the North Sea. Samples were taken 12 - 24 times per year between 1990 and 1999 and analysed to the level of genus, species, or other taxon group. The dataset has been used for assessment of the marine environment and habitat quality in the scope of the OSPAR Quality Status Reports and the Marine Strategy Framework Directive. Currently, there are known issues concerning the quality of the data caused by changes in analytic procedures and labs. When more information is available, this will be published through EMODnet.

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    Zooplankton data from Polish Exclusive Economic Zone of the Baltic Sea collected in frame of the Polish Monitoring Programme. Data include information on species composition, abundance and biomass of zooplankton community for the period of 2002-2012.

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    Zoobenthos data from Polish Exclusive Economic Zone of the Baltic Sea collected in frame of the Polish Monitoring Programme. Data include information on species composition, abundance and biomass (wet and dry) of zoobenthos community for the period of 1979-2012.

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    Long term measurements of phytoplankton composition in the Dutch national part of the North Sea. Samples were taken 12 - 24 times per year between 2000 and 2018 and analysed to the level of genus, species, or other taxon group. The dataset has been used for assessment of the marine environment and habitat quality in the scope of the OSPAR Quality Status Reports and the Marine Strategy Framework Directive. Currently, there are known issues concerning the quality of the data caused by changes in analytic procedures and labs. When more information is available, this will be published through EMODnet. The monitoring is directed and the dataset is maintained by Rijkswaterstaat, the executing body of the Dutch Ministery for Infrastructure and Environment. Publication of the dataset has been facilitated by Deltares, The Netherlands.

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    Long term measurements of benthos composition in the Dutch national part of the North Sea. Samples have been taken by benthic sledge, box-corer, video and Hamon sampler. Samples were taken annually between 1991-2010, in 2012 and in 2015 and analysed to the genus or species level. For video sampling, coverage percentages were measured. The dataset has been used for assessment of the marine environment and habitat quality in the scope of the OSPAR Quality Status Reports and the Marine Strategy Framework Directive.

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    The dataset include Finnish zooplankton monitoring data from the Baltic Sea. The Finnish zooplankton monitoring program started in 1979 and is still ongoing. The sampling has normally taken place in late summer (August), but since 2014 sampling is also carried out in early summer (May-June).The zooplankton monitoring was performed by Finnish Institute of Marine Research until 2008, thereafter the Finnish Environment Institute is responsible for the monitoring program. Samples are taken using a WP-2 net (normally 2550 cm2 opening and 100 um mesh size). The monitoring follows the HELCOM COMBINE guidelines, but subsampling is done using Folsom splitter. The dataset is also accessible through the NOAA COPEPOD database.

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    The POHJE database includes data on benthic macrofauna, covering the Finnish coastal areas as well as the offshore areas of the Baltic Sea. The quantitative data mainly stem from the Finnish national monitoring program and statutory monitoring programs, but also data from surveys and research projects are included. In total the database contain aproximately 100 000 quantitative records including developmental stages, with a time span from 1965 to present. The database is regularly maintained and data is added continuously.