Dataset

Dutch long term monitoring of phytoplankton in the Dutch Continental Economical Zone of the North Sea

EurOBIS MeasurementOrFact Open in mapper Explore occurrences

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.

Citation: Ministery of Infrastructure and Environment, The Netherlands; (2020): Dutch long term monitoring of phytoplankton in the Dutch Continental Economical Zone of the North Sea

Published: September 17, 2025 at 10:13

URL: http://ipt.vliz.be/eurobis/resource?r=mwtl_phytoplankton

Ministerie van Infrastructuur en Waterstaat; Rijkswaterstaat
Ministerie van Infrastructuur en Waterstaat; Rijkswaterstaat

Willem Stolte
Deltares

148,530
occurrence records
168,318
measurements and facts
433
taxa
284
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 148,530
100.0%
maximumDepthInMeters 14,252
9.6%
minimumDepthInMeters 14,252
9.6%
scientificNameID 146
0.1%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
NO_ACCEPTED_NAME 22,468
15.1%
ON_LAND 18,123
12.2%
NO_DEPTH 14,252
9.6%
MARINE_UNSURE 10,571
7.1%
NOT_MARINE 742
0.5%
NO_MATCH 146
0.1%

Measurement types

DNA derived data