Working on a baseline for the Kongsfjorden food web: production and properties of macroalgal particulate organic matter (POM), supplementary material ...

• Main Authors: Buchholz, Cornelia Maria, Wiencke, Christian
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Sampling by diver; Kongsfjord*; Kongsfjorden
• Online Access: https://dx.doi.org/10.1594/pangaea.857530; https://doi.pangaea.de/10.1594/PANGAEA.857530

Macroalgae, in particular kelps, produce a large amount of biomass in Kongsfjorden, which is to a great extent released into the water in an annual cycle. As an example, the brown alga Alaria esculenta loses its blade gradually, 3 ± 0.8 % of the blade area per day (August 2012), thereby adding to the pool of particulate organic matter (POM) in the fjord. Upon release small thallus pieces are “aging” in that they are prone to leaching and serving as substrate for microorganisms, thus turning into palatable food for suspension and bottom feeders. In order to define a macroalgal baseline for the Kongsfjorden food web, stable isotopes d14C and d15N were measured in individuals of A. esculenta, Saccharina latissima and Laminaria digitata directly sampled after collection and in artificially produced POM (aPOM) of A. esculenta that was allowed to age under experimental conditions. In aPOM from this species sampled in August 2012 the C/N ratios decreased between d1 and d8 of a 14-day culture period in parallel to ... : Supplement to: Buchholz, Cornelia Maria; Wiencke, Christian (2015): Working on a baseline for the Kongsfjorden food web: production and properties of macroalgal particulate organic matter (POM). Polar Biology, 12 pp ...