These data were collected in the framework of a PhD thesis. The main aim of this study was to get a better insight in the nematode fauna living in the Southern North Sea, with an emphasis on morphological, systematic and ecological aspects.

Dataset on meiobenthos densities and biomass of nematode genera for 2 stations (North Sea and Westerschelde) sampled on 22June 1993 and 31March 1994. The data were digitized by VLIZ from the original report: Tuhumury, S.F. (1995). Vertical distribution of meiofauna related to biogeochemistry: a case study from one station in the North Sea and one station in the Westerschelde estuary. MSc Thesis. RUG: Gent. 102 pp.

Data collected from this PhD study form part of a global research project, aiming to evaluate the effect of the Delta works on the Dutch Delta ecosystem.

Data were collected in the framework of a multidisciplinary project ECOFLAT, which aims to study the ecometabolism of the Molenplaat (SW Netherlands).

Firstly, one wanted to analyse the response of nematode biomass spectra (NBS) to three distinct stressors upon the sediment habitat and secondly, analysing the NBS in different ways to be able to discuss the advantages and disadvantages of various methods.

Monitoring of free-living nematodes at the C1-LTER station (Gulf of Trieste, northern Adriatic Sea), seasonal frequency from 07-2010 to 07-2012. The sampling was carried out by a KC Haps bottom corer with polycarbonate sample tubes (12.7 cm I.D. with a sample area of 127 cm2).

The abundance, community composition and species diversity of the nematode community at a station on the Belgian Continental Shelf is documented on a monthly basis. This study was carried out as part of a PhD thesis

Free-living nematodes of the Mar Piccolo of Taranto (Ionian Sea, southern Italy), 2013-2014 in the framework of the Italian flagship project RITMARE. In June 2013 and April 2014, sampling was carried out at four sites by scuba divers who collected five virtually undisturbed sediment cores using polycarbonate sample tubes (12.7 cm I.D. with a sample area of 127 cm2). In laboratory, one sediment core was subsampled by means of 3 cut-off plastic syringes (2.7 cm I.D., surface area of 5.72 cm2, 0-10 cm top sediment) in order to obtain three pseudoreplicates.

The principle aim of this research was to investigate the morphometry of nematode communities as triggered by a phytoplankton spring bloom deposition in a well oxygenated North Sea sampling station. Length and width measurements are available together with densities.

The nematode communities from 102 stations in the Southern Bight of the North Sea, sampled between 1972 and 1984, are examined. On the whole, 456 species, belonging to 159 genera and 37 families were found.