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Stellenangebotsbeschreibung: BackgroundGlobal warming causes changes to the Arctic sea-ice habitat with yet uncertain consequences for the structure and functioning of complex marine food webs. Currently, the Central Arctic Ocean (CAO) is primarily covered by a perennial ice sheet, which is predicted to shrink and thin dramatically in the decades to come. Pelagic food webs in the CAO can be highly dependent on ice-associated (sympagic) food sources, but how prevailing trophic structures will change with ice retreat remains unclear.The main research goals of the PhD project are to i) quantify the trophic dependency of the CAO food web on ice-associated vs. pelagic microalgae and ii) elucidate the transfer of these carbon sources from zooplankton to commercially important fish species to ass...