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Fig. 2 | Environmental Microbiome

Fig. 2

From: Out of the blue: the independent activity of sulfur-oxidizers and diatoms mediate the sudden color shift of a tropical river

Fig. 2

Chemical characterization of filtered or precipitated materials from the water streams at the confluence that originate Río Celeste. a-f Scanning electron microscopy (SEM) images from different materials The atomic Al/Si ratios were obtained by EDS scans. a Filtered materials from Río Buenavista; the solids retained by the membranes are mainly frustule fragments. b Detail of a frustule fragment. c Filtered materials from Río Celeste; frustule fragments along with agglomerated particles are retained by the filter membranes. d Magnification showing a detail of the agglomerated filtered particles from Río Celeste. e Agglomerated particulate materials obtained by in vitro precipitation of a water sample from Quebrada Agria. f Magnification performed on the specimen in e, showing the agglomerated particles. g Fourier-transform infrared (FTIR) spectrum of the particles suspended in Río Celeste, the precipitates occurring downstream from ‘Teñidero’, and other minerals known to precipitate in similar settings, including hydroxyaluminosilicates (HAS)

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Environmental Microbiome

ISSN: 2524-6372