Figure 6: Kittiwake foraging hotspots.
From: Subglacial discharges create fluctuating foraging hotspots for sea birds in tidewater glacier bays
Foraging was recorded in 2015 in the Brepollen area, outlined as a red rectangle (a), for a sample of kittiwakes from a colony in Hornsund – yellow dot (a). Three foraging hotspots were recorded in Brepollen, where 36% of the kittiwakes’ foraging activity took place (b). The compactness of kittiwake distribution at the Storbreen ice face - magenta arrow at (b) - shows that foraging overlap more than 90% formed a hotspot about 40 m in radius (90% contour), while an overlap of over 50% covered an area with radius of about 100–200 m (50% contour) (c). (c) also shows the concentration of water contact points of Kittiwakes within the discharge plum. The maps were drawn in ArcGIS 10.3.1 for Desktop, Esri Inc., http://www.esri.com.
