Fig. 3
Diversity assessments for apteronotids by stream order support the Riverine Network Hypothesis. (a) Alpha diversity by SO. Orange = alpha diversity. Blue = alpha diversity/river length (km); (R2 = 0.45, p = 0.03). (b) Proportional diversity by SO. Black = beta diversity \({(\beta }_{W})\). Blue = alpha diversity / river length (km). (c) Pairwise species turnover matrix of \({\beta }_{A}\) values by river segments. Beta diversity values below and proportional values above diagonal. Note in A highest alpha in SO7 and highest proportional alpha in SO10, in B highest beta in SO5, and in C highest species turnover among SO between medium and largest rivers (SO 4 and 9), and most shared species in largest rivers.
