Fig. 1

Example diagrams showing the 7 patterns revealed for the growth of algal strains on solid media under atmospheres of elevated CO₂ concentrations in air. Bold numbers, general patterns of mean growth (see text). The graph shows the mean growth from 3 replicate experiments in relation to controls under ambient CO₂. Arrows mark examples for the different relations, i.e., 1, no change; > 1, enhanced growth; < 1 decreased growth; blue, example diagrams for the new terrestrial green algal isolates (see Table 1); green, examples diagrams for the 4 strains selected for further testing (see text)