Long description

Figure 6 shows three circles representing clean waters, organically polluted water and water suffering eutrophication. The proportions of producers, consumers and decomposers in each are shown by means of slices (as in a pie) as follows (approximately):

Clean waters Organically polluted waters Waters showing eutrophication
Producers 80 15 87
Consumers 13 5 4
Decomposers 7 80 9