TABLE 2. PRIMARY PRODUCTION AND DESTRUCTION IN PHYTOPLANKTON 



SAMPLES (BLUE-GREEN + DIATOM) UNDER THE ACTION OF HEAVY 



METALS. VALUES INDICATED AS PERCENT OF THE CONTROL 



Concentration 



of Ions, mg/1 Photosynthesis Destruction 



1.10" 2 10.6 38.8 



5.10" 1 17.3 20.0 



.10" 1 4.2 11.1 



.10" 3 58.7 120.0 



.TO" 2 116.0 180.0 



.lO' 1 102.0 550 



.0 31.4 450.0 



105 



