Consider this northern site of primary succession following the retreat of a glacier. Plant species at location B. would eventually change to the species seen at location C. because of what factor? A) being shaded out by taller species B) competition for water resources C) competition for root space D) pathogens and disease
The answer is A, being shaded out by taller trees.
Explanation:
Low growing shrubs and small trees eventually give way to larger tree species. Notice there is little under story (lower level) because of light restrictions.
