Fatty acid composition, ice chemistry and algae biomass during an Arctic sea ice algal bloom on landfast ice near the settlement of Svea, in Van Mijenfjorden, Spitsbergen ...

• Main Authors: Leu, Eva, Brown, Thomas A, Graeve, Martin, Wiktor, Jozef M, Hoppe, Clara Jule Marie, Chierici, Melissa, Fransson, Agneta, Verbiest, Sander, Kvernvik, Ane C, Greenacre, Michael J
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2020
• Subjects: bulk and compound-specific isotope analysis; fatty acid; highly branched isoprenoid HBI; H-Print; IP25; Lipid; stable isotope ratio; Trophic marker; FAABulous Future Arctic Algae Blooms and their role in the context of climate change FAABulous; Arctic; Svea; Van Mijenfjorden; Climate change; ice algae; Phytoplankton; Sea ice; Spitsbergen
• Online Access: https://dx.doi.org/10.1594/pangaea.925015; https://doi.pangaea.de/10.1594/PANGAEA.925015

The relative importance of sea ice algal-based production is often vital for studies about climate change impacts on Arctic marine ecosystems. The relevance of sea ice algal production for different parts of the polar ecosystem, ranging from key pelagic grazers to mammals and assessing the overall strength of sympagic-pelagic or sympagic-benthic coupling has been extensively studied. The key interest in all these studies is quantifying the relative importance of biomass produced by sea ice algae (as opposed to phytoplankton) for higher trophic level production. Different types of trophic markers are widely applied to analyse food web structure, based on numerous assumptions of how sea ice algae differ biochemically from phytoplankton. Several types of lipid biomarkers and stable isotope ratios are widely used for tracing sea ice associated (sympagic) vs. pelagic particulate organic matter (POM) in marine food webs. Beside the typical proximate data (POC, Chl-a, DIC, Biomass), we analysed fatty acids, highly ...