Macrofauna and meiofauna food-web structure from Arctic fjords to deep Arctic Ocean during spring: A stable isotope approach

•In fjords benthos utilized a wide range of organic matter sources.•Arctic fjord and shelf benthos displayed a high degree of omnivory.•Feeding on higher trophic levels dominated in deep-sea benthos.•Macrofauna mainly relied on fresher organic matter arriving to the sea floor.•Meiofauna mainly relied on the reworked organic matter from the sediments.