Mesozooplankton abundances at timeseries station Helgoland Roads, in 2019


Samples to detemine zooplankton abundance were collected as part of the Helgoland Roads long-term data series in 2019. Zooplankton were sampled at the "Kabeltonne" site (54°11.3′N, 7°54.0′E) using an oblique haul with a 150µm hand net (Apstein, Hydrobios, Kiel) and preserved in 4% formaldehyde (buffered with Borax) to allow for storage and later examination. Sampling volume was calculated with a mechanic flowmeter (Hydrobios, Kiel). Samples were counted either as whole or as subsamples depending on the density. However, at least 60 individuals of each key species were counted per subsample to ensure counting of a representative part of the sample. Species were identified to the lowest possible taxonomic level using a stereomicroscope (Leica M205C). If identification to the species level was not possible, the next identifiable taxonomic category was assigned.

The data provided here represents a summary of species and taxonomic groups. Species and groups added together are shown in the parameter comments (see "Further Details").Empty cells = taxon was not investigated in this sample.

Related Identifier
Metadata Access
Creator Boersma, Maarten (ORCID: 0000-0003-1010-026X); Renz, Jasmin
Publisher PANGAEA
Publication Year 2024
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints);
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 3828 data points
Discipline Biospheric Sciences; Ecology; Geosciences; Natural Sciences
Spatial Coverage (7.900 LON, 54.188 LAT); German Bight, North Sea
Temporal Coverage Begin 2019-01-04T09:30:00Z
Temporal Coverage End 2019-12-30T00:00:00Z