Fig. 4. Emergence of an r- and K-strategy along the ancestry of P9.

Over time, cell density (a) and symbiont number (b) have increased, but growth measured as invasion speed (c) and nutrient availability (d) have decreased. The final population resembles the most recent ancestor, but strains at high and low nutrient influxes have adapted to those specific environments. Diamonds depict the conditions in which the ancestor lived.