Primary succession on bare rock would likely begin with which group?
Primary succession on bare rock begins where soil, organic matter, and an established biological community are absent. Lichens are effective pioneers because the partnership between a fungus and a photosynthetic alga or cyanobacterium can survive desiccation, temperature extremes, and low nutrient supply. The fungal component anchors to rock, retains water, and releases organic acids, while the photosynthetic partner supplies carbohydrates; cyanobacterial partners may also fix nitrogen. Physical and chemical weathering loosen mineral particles, and dead lichen material contributes organic matt
Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 20