Fig. 6
From: Open networks from within: input or output betweenness centrality of nodes in directed networks
Input betweenness centrality (IBC) a and Output betweenness centrality (OBC) b of each node in a food web of Florida bay are plotted against its out-degree and in-degree, respectively. The blue triangles are the average value over 1000 randomized networks with degree-preservation. The error bars represent the standard deviation. The red squares represent nodes whose IBC or OBC are judged to be significantly higher than those of the corresponding nodes in degree-preserving random networks by the procedure describe in the main text. The green points are the other non-significant nodes