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. 2020 Feb 3;101(3):e02951. doi: 10.1002/ecy.2951

Figure 6.

Figure 6

Competition between the marine cyanobacteria Prochlorococcus and Synechococcus. (A) Absorption spectra of Prochlorococcus and Synechococcus. The spectrum of Prochlorococcus shows absorption peaks of divinyl‐chl a (440 and 675 nm) and divinyl‐chl b (470 and 650 nm), whereas Synechococcus shows absorption peaks of chl a, phycourobilin (PUB, at 495 nm) and phycoerythrobilin (PEB, at 545 nm). (B) Model predictions of competition between Synechococcus (red line) and Prochlorococcus (green line), as function of the relative contribution of blue (450 nm) and green (550 nm) light. Solid lines show the outcome of competition; dashed lines indicate the steady‐state biomass in monoculture. The spectrum of Prochlorococcus was obtained from a field sample of the deep chlorophyll maximum at station ALOHA, north of the island of Oahu, Hawaii, USA, collected by M. Stomp, L. J. Stal, and J. Huisman. The spectrum of Synechococcus WH7803 was kindly provided by L. Garczarek.