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Table 2 Effects of different concentrations of heavy metals and pentachlorophenol (Pent.) on the compensation points (CP, μmol m-2 s-1) of photosynthesis in C. reinhardtii after 24 h exposure.

From: Effects of Cu2+, Ni2+, Pb2+, Zn2+ and pentachlorophenol on photosynthesis and motility in Chlamydomonas reinhardtii in short-term exposure experiments

Concentration, Substances
mg l-1 Copper Nickel Lead Zinc Pent.
0.0 118 118 118 118 118
0.1 162 126 61 88 19
0.5 366 165 48 85 48
1.0 579 132 48 98 29
1.5 579 192 38 83  
2.0 579 105 98 108  
5.0      21
10.0      31
R 0.87   0.45 0.58  
  1. R - coefficient of correlation between increasing concentrations of the substances tested and the CPs. Absolute values of R below 0.15 are not shown.