That theory has yet to be scientifically proven. These old growth Sequoia forests, however, represent an ecological momet in time which may not be reproduced agains in many thousands of years. The old growth provides important habitat for wildlife, say scientists. In its forests, downed logs, snags or broken top trunks, beds of moss and lichen, towering canopies of branches and leaves, and cool streams provide homes for martens, fishers, coho salmon, marbled murrelet and northern spotted owl. And there is more subtle value, they say.
Fungi help the trees absorb nutrients and resist insects.
Decayed trunks build soil or hold water like a sponge. The tall trees trap and hold moisture. Branches and needles catch dust and dirt, thus cleansing the air. Plant photosynthesis removes carbon dioxide gas from the atmosphere. Roots bind soil against erosion.