Like plants, some bacteria and algae can get their energy from sunlight. They all have certain preferences for the color of light, some like blue, others red light. They take on the color and therefore you can see red glaciers. And that’s why they have different color-particles (pigments), which can be seen in the microscope.
„Ancylonema“, this alga only grows on glacial ice. They color the ice surface light-grey.
Phototrophic bacteria &
Phototrophic bacteria and algae occur in alpine lakes, as well as on glacier-surfaces. Their preferences for light of different wavelengths expresses in different pigmentations. One idea is to use a prism to create a colorful projection on the surfaces which stimulates the growth of different bacteria / algae species. Presentation of Engelmann’s bacterial experiment for the photosynthesis of algae-filaments.
Institute of Botany (Kranner), Institute of Microbiology (Wagner)