Sulfolobus. Image provided by Mark Young and Sue Brumfield, Montana State University. Thin sections photographed using an electron microscope and subsequently been colourised.
This bacterium occurs in very large numbers and gives certain regions of water deriving from the spring a very bright red colour. The colour comes from the rhodopsin pigment. Phase contrast microscopy.
This image is of a small sample from a region of water that had a bright red colour. The rod shaped bacteria are the Halobacterium, but other species are present. The small refractile globules are sulphur droplets. Phase contrast microscopy.
