(Table 2) Stable carbon and nitrogen isotope ratios and molar C/N ratio for euchaetid and aetideid copepods during POLARSTERN cruise ANT-XXIII/5 ...

• Main Authors: Laakmann, Silke, Auel, Holger
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: AWI; Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; Station label; Species; Life stage; Depth, top/min; Depth, bottom/max; δ13C; δ15N; Carbon/Nitrogen ratio; Number of individuals; Multiple opening/closing net; Element analyser isotope ratio mass spectrometer EA-IRMS; ANT-XXIII/5; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; Southern Ocean; Antarc*; Antarctica; Sea ice; South Atlantic Ocean; Copepods
• Online Access: https://dx.doi.org/10.1594/pangaea.848509; https://doi.pangaea.de/10.1594/PANGAEA.848509

Stable isotope (SI) ratios of carbon (d13C) and nitrogen (d15N) were measured in omnivorous and carnivorous deep-sea copepods of the families Euchaetidae and Aetideidae across the Atlantic sector of the Southern Ocean to establish their trophic positions. Due to high and variable C/N ratios related to differences in lipid content, d13C was corrected using a lipid-normalisation model. d15N signals ranged from 3.0-6.9 per mil in mesopelagic species to 7.0-9.5 per mil in bathypelagic congeners. Among the carnivorous Paraeuchaeta species, the epi- to mesopelagic species Paraeuchaeta antarctica had lower d15N values than the mesopelagic P. rasa and bathypelagic P. barbata. The same trend was observed among omnivorous Aetideidae, but was not significant. In the most abundant species P. antarctica, individuals from the western Atlantic had higher d13C and d15N values than specimens at the eastern stations. These longitudinal changes in d13C and d15N values were attributed to regional differences in hydrography and ... : Supplement to: Laakmann, Silke; Auel, Holger (2009): Longitudinal and vertical trends in stable isotope signatures (d13C and d15N) of omnivorous and carnivorous copepods across the South Atlantic Ocean. Marine Biology, 157(3), 463-471 ...