Q. Find out the correct order of succession levels in xerarch.
A) Lichen, moss stage, annual herb stage, perennial herb stage, scrub stage, forest
B) Annual herb stage, perennial herb stage, lichen, moss stage, scrub stage, forest
C) Perennial herb stage, annual herb stage, lichen, moss stage, scrub stage, forest
D) Scrub stage, forest, annual herb stage, perennial herb stage, lichen, moss stage
Explanation
Succession levels in xerarch (xerosere/lithosere) are : (i) Lichen stage, e.g., Crustose lichens followed by foliose lichens. (ii) Moss stage, e.g., Tortula, Polytrichum (iii) Annual grass stage, e.g., Cymbopogon (iv) Perennial herb and shrub stage, e.g., Rubus, Capparis, Zizyphus. (v) Climax community, e.g., Forests with herbs, shrubs and trees.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.