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Fig. 3 | Environmental Microbiome

Fig. 3

From: Microbial community dynamics and coexistence in a sulfide-driven phototrophic bloom

Fig. 3

Spectral Absorbance. a Sample spectra for each depth at the three sites and five different time points. Each spectrum represents the average of at least three replicate spectral analyses per sample. Confidence bands along the spectra indicate standard deviation (bands are mostly smaller than the center line and thus not visible). Green and purple vertical bands indicate major absorbance peaks of photopigments characteristic for the GSB group (Prosthecochloris and Chlorobaculum, 720–760 nm) and the PSB group (Allochromatium and Halochromatium, 790–810 nm and 845–865 nm), respectively, highlighting the transient appearance, succession and overall importance of these anoxygenic phototrophs over the course of the experiments. Also indicated is the general phototroph absorbance peak at 425–465 nm as a light gray vertical band. Cyanobacterial photopigments have distinct absorbance peaks in the 500–700 nm range that are not prominent in the sample spectra except for the characteristic 670–685 nm peak (light brown vertical band) reflecting the presence but likely minor role of these taxa during the experiment. b Photopigment absorbance spectra from pure culture representatives of major phototrophic lineages. Vertical bands are, as in panel A, highlighting diagnostic absorbance peaks of GSB (in green), PSB (in purple), Cyanobacteria (in brown) and phototrophs in general (in gray). All absorbance spectra were normalized to the respective highest peak

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