61
5 Eutrophication of Lakes
Fig. 5.2 Percentage of organisms found in the main Ibirité
reservoir: 1, 2, and 4 are resistant
taxa, 3 are alien species, and 5
are typical organisms of lentic
environments
Fig. 5.3 Spatial distribution of
organisms sampled in the main
Ibirité reservoir: a Chironomidae,
b Oligochaeta, and c Melanoides
tuberculatus