Answers

Ashu bhat
Jul 25, 2020

(i) Lichens are the pioneer species on a bare rock.
(ii) The lichens secrete some acid to dissolve rock and help in weathering and soil formation.
(iii) Later, some small bryophytes invade and hold the small amount of soil.
(iv)The bryophytes are succeeded by herbs, shrubs and ultimately big trees.
(v) At last, a stable climax forest is formed.
(vi) Mesophytic climax community will be established from xerophytic habitat.