Figure 1. Inhibition of bacterial growth by differently concentrated Pleurozium schreberi solutions hosting different numbers of cyanobacteria and with that, different N₂ fixation rates (A–F).

These dose-response relationships were used to establish indices for toxicity (EC₅₀ values) that were used in subsequent analyses (Fig. 2). Data points are mean values±1 SE of two determinations, and the fitted logistic curves (see Material and Methods) are based on the eight moss-concentration levels (n = 8).