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Old Jan 29, 2017, 11:16 AM   #1
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Default Could it be?

I have been noticeing red pigmentation among some of the lichens that I have been observing and I am wondering what may be causing it? Is it:
  • pH of the substrate
  • Pollution
  • or none of the above but something peculiar to the lichen itself





Images: Meiji EMZ 13TR dissecting microscope with Sony DSC-W5 f/2.8 @ 1/2 sec. ISO 100 Illumination: fiber optic IR filtered halogen, 150W var.
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Old Jan 29, 2017, 4:36 PM   #2
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Default More "red stuff"

Another patch of pigmentation.
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Old Jan 29, 2017, 5:57 PM   #3
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Are these lichens growing on stone? I recall from a long time back, hearing that lichens which grew locally on granite, picked up some reddish coloring from iron compounds in the rocks.
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Old Jan 29, 2017, 6:11 PM   #4
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You know that would more than likely explain it all but these are growing on a smooth bark substrate, probably poplar. The sample was gathered up off the ground where poplars are dominant. Thanks
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