Identification of Biotic Components - Evolutionary Biogeography - page 123

biota. On the basis of the seventy-two individual tracks of fig. 4.18 - 4.26
(Contreras-Medina and Eliosa-León 2001):
a. Obtain the generalized tracks, by overlapping the individual tracks, and
draw them on the map in fig. 4.27 .
b. Obtain the nodes, in the areas where different generalized tracks overlap,
and draw them on the map in fig. 4.27 .