Figure 4
From: Antarctic food web architecture under varying dynamics of sea ice cover
Benthic food web structure in Terra Nova Bay, Antarctica: BEFORE (a) and AFTER (b) sea-ice break up. Each node represents one Isotopic Trophic Unit (ITU) in the community. Isotopic Trophic Units (ITUs) i.e. squares having 1 × 1‰ ranges of δ15N and δ13C values, were defined as groups of individuals occupying the same position in the δ13C-δ15N niche space. Arrows point from a resource to its consumer. Nodes containing basal food sources are highlighted in different colours: green = sympagic algae, brown = organic matter in sediments, pink = plankton, violet = macroalgae. Letters and numbers identify each node as displayed in Fig. 2 and Fig. S1. The food web graphs were developed using Cytoscape software. For the list of taxa in each ITU please refer to Table S2.
