the European side of the Arctic. However, this “Atlantification” has rarely been confirmed, as
long-term datasets on Arctic marine organisms are scarce. We present a 19-year time series
(1982–2016) of diet samples from black-legged kittiwakes as an indicator of the changes in
a high Arctic marine ecosystem (Kongsfjorden, Svalbard). Our results highlight a shift from
Arctic prey dominance until 2006 to a more mixed diet with high contribution of Atlantic …