Question

Differentiate between hydrosere and xerosere.

Answer 1

Sr. No.	Hydrosere	Xerosere
1.	Succession initiating in ponds, pools, lakes or elsewhere in water is called hydrosere.	Succession beginning on the bare rock or other places where there is an extreme deficiency of water is called xerosere.
2.	It starts in an aquatic environment.	It starts in a dry or extremely water-deficient area.
3.	Early colonizers are aquatic or marshy plants.	Early colonizers are lichens and mosses that can survive in dry conditions.
4.	The soil initially is submerged or waterlogged.	Soil formation begins slowly through the weathering of rocks.
5.	Progression leads to the establishment of terrestrial plants and a climax forest.	Progression leads to gradual soil development and finally vegetation like shrubs and forests.
6.	The process is also called hydrarch succession.	The process is also called xerarch succession.