Fig. 4: Fertilization experiment.
From: Biogeochemical explanations for the world’s most phosphate-rich lake, an origin-of-life analog
Time series of chlorophyll a concentration during incubation in natural light following experimental amendment of a Goodenough Lake, and b Last Chance Lake water with no fertilizer (“control”), 100 µmol N L−1 of a 1:1 (NH4)2SO4 + NaNO3 mixed solution (“+nitrate + ammonium”), or a 100 µmol P L−1 of a Na3PO4 solution (“+phosphate”). Error bars indicate the standard deviation from replicate chlorophyll a analyses.
