Of all the plants, lichens are best adapted to survive in the harsh cold climates. Some lichens have even been found only about 600 miles from the South Pole. Lichens have even proliferated in Antarctica mainly because there is little competition from mosses or flowering plants and because of their high tolerance of drought and cold. The peculiarity of lichens is that they are not one homogeneous organism but a symbiosis of two different partners, a fungus and an alga. The fungus part supplies the plant with water and nutritious salt, meanwhile the alga part organic substance, like carbohydrate produce. With this ideal “job-sharing”, lichens can survive the hardest conditions. Lichens aren’t only frugal and robust, they jug out because of their very low sensibility against frost. Some lichens, in an experiment, survived a bath in liquid nitrogen at minus 195 degrees. Especially unfavorable conditions are in the “dry valley” of East Antarctica, where big coldness and low snowfall meet. But even there scientists have found a dark cover on the north side of some rocks, which prove to be lichens. Under the microscope it was shown that the lichens penetrate the upper coat of the rock. With the dark color the lichens absorb more light. This strategy enables the lichens to scrape a humble living in that harsh environment.
Roof Cleaner is a local company that uses soft-wash techniques to clean your roof of these black streaks without causing any damage to the shingles.