Seabird fertilisation stable isotope data
C and N stable isotope data from a study on seabird fertilisation in the Baltic Sea.
Steps to reproduce
Sediment and biological (bird faeces and chironomid larvae) samples were freeze dried, grinded, homogenized and weighed in tin capsules. Analyses on biological samples were performed with a PDZ Europa ANCA-GSL elemental analyzer connected to a PDZ Europa 20-20 isotope ratio mass spectrometer (IRMS, Sercon Ltd.), while those of sediment samples were analyzed on an Elementar Vario EL Cube elemental analyzer (Elementar Analysensysteme GmbH) connected to the same IRMS system. Isotopic compositions were reported using the conventional δ notation, which reports the isotopic composition of a sample as the ‰ deviation of a sample relative to VPDB (δ13C) and atmospheric N2 (δ15N). Samples were regularly interspersed with two different laboratory standards, which were previously calibrated against NIST Standard Reference Materials (IAEA-600, USGS-40, USGS-41, USGS-42, USGS-43, USGS-61, USGS-64 and USGS-65). Based on the analyses of these standards the analytical precision was ± 0.2 ‰ for 13C and ± 0.3 ‰ for 15N.