Examples of three types of intertidal biofilms observed at study sites with varying pigmentation

Examples of three types of intertidal biofilms observed at study sites with varying pigmentation. (a) Dark gray-greens are indicative of cyanobacteria; (b) Golden brown is indicative of diatoms; (c) Bright green is indicative of chlorophytes. From the study Multi-Scale Spectroscopy to Map Intertidal Microbial Biofilm Community and Trait Diversity.