Fig. 3

Dendrogram of Chile’s current freshwater fish taxa (x-axis) presence (black area) and absence data (light-grey area) distributed among six biotic units ordered from north to south (y-axis: U1 Titicaca, U2 Atacama, U3 Central, U4 South-Central, U5 South, U6 Patagonia). Two clusters (I y II) can be identified that are separated by a white vertical line. Native and alien (non-native) taxa have been suffixed with “N” and “A,” respectively