Abundance of Cnidaria and Ctenophora taxa in the North Atlantic sampled during the G. O. Sars Cruise in May 2013


In recent years a global increase in jellyfish (i.e. Cnidarians and Ctenophores) abundance and a rise in the recurrence of jellyfish outbreak events have been largely debated, but a general consensus on this matter has not been achieved yet. Within this debate, it has been generally recognized that there is a lack of reliable data that could be analyzed and compared to clarify whether indeed jellyfish are increasing throughout the world ocean as a consequence of anthropogenic impact and hydroclimatic variability. During the G.O. Sars cruise jellyfish were collected at different depths in the 0-1000m layer using a standard 1 m**2 Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS) (quantitative data), Harstad and macroplankton trawls (qualitative data). The comparison of records collected with different nets during the G.O. Sars transatlantic cruise shows that different sampling gears might provide very different information on jellyfish diversity. Indeed, the big trawls mostly collect relatively large scyphozoan and hydrozoan species such as Atolla, Pelagia, Praya, Vogtia, while small hydrozoans (e.g. Clytia, Gilia, Muggiaea) and early stages of ctenophora are only caught by the smaller nets.

The research leading to these results received (partial/full) funding from the European Commission FP7 EURO-BASIN (European Basin-Scale Analysis, Synthesis, and Integration; Grant Agreement 264 933).

DOI https://doi.org/10.1594/PANGAEA.829702
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.829702
Creator Licandro, Priscilla; Aino, Hosia
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Contributor Sir Alister Hardy Foundation for Ocean Science
Publication Year 2014
Funding Reference Seventh Framework Programme, 264933
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Language English
Resource Type Dataset
Format text/tab-separated-values
Size 4559 data points
Discipline Earth System Research
Spatial Coverage (-46.193W, 59.380S, 5.071E, 68.790N); North Atlantic; Labrador Sea
Temporal Coverage Begin 2013-05-03T18:50:00Z
Temporal Coverage End 2013-05-20T18:34:00Z