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

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...

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Bibliographic Details
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
Description
Summary: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 ...

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