ALGAE Adaptations facilitating take-off into the air are unknown in the algae, though some of the simpler types of algal cells get into the air regularly. Pettersson (194o) suggested that Clilamydomonas nivalis is carried away from its habitat on snow-fields and glaciers in melt-water and becomes airborne by splash in mountain torrents. Lichen soredia may possibly aid the dispersal of algae when they become grounded in a habitat moist enough for the algal component to dominate the fungus, and where the resulting colony will be an alga instead of a lichen. Again, some terrestrial and epiphytic algae may crumble and blow away.