These bacteria decompose the organic matter formed in the top layers, and thus recycle the biomass. Underneath the colored bands the sand turns grey due to a chemical formation of pyrite. You are welcome to download the images. Annotations are included. If you want to see them first, click on ann .
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The same view after illumination with green light. Some more filamentous cyanobacteria from the green layer of a microbial mat from the Great Sippewissett Saltmarsh. MBL A short fragment of the cyanobacterium Spirulina spec . Autofluorescence of the same view after illumination with green light. The weak fluorescence of the diatom due to its chlorophyll a cannot be seen.